• Training
• Wiki

Training

We started a discussion of our sub-projects, doing some research into project presentation including: wiki layout, t-shirt design and possible team logos. We looked at precedents for inspirational ideas.

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We then learnt about Computational Modelling and BioBrick concepts. Decided to start with biophysical modelling of the lipid membrane of Bacillus subtilis and modelling of lipid synthetic pathway. Later in the day, the entire team met to discuss aims and progress of our work.

Wiki

Initial designs for the wiki have been created and uploaded. Currently all style sheets and javascript pages are stored externally until the design has been ratified by the team. Front-page image carousel has been created and initialised with blank colours to demonstrate what it shall look like until actual photographs have been taken and edited.

• Modelling Training
• Wiki

Modelling Training

We started off working on a Modelling Exercise to identify components and species of the subtilin biosynthesis pathway. We also sketched down some potential logo ideas and created a shortlist of favorites.

We then went on to learn about the differences and similarities between stochastic and deterministic modeling. We also used rule based modeling such as RuleBender and BioNetGen. Using the Michaelis-Menten kinetics model as an example, we alter the parameters and rates of reaction to observe the effects.

Wiki

The wiki design was agreed upon and further developed. A front-page image display has been created, developed and set up with dummy text and placeholder images. Discussions have been held over the layout for the calendar, the general consensus being that as few a clicks as possible should be needed to switch between and overall summary of what was done and the more detailed view. Designs are started with the idea being to create a large calendar holding daily headlines that spawn a non-obtrusive pop-up window containing more detail.

• Modelling Training
• GUS cloning strategy

Modelling Training

Today we continued learning about stochastic and deterministic modelling and looked at converting the rate parameters in RuleBender. We continued working on the design of our logo.

GUS cloning strategy

We began work on the GUS cloning strategy which we plan to use to create Beta-glucuronidase producing L-forms to grow and visualise L-forms in plants. The β-glucuronidase produced by the L-forms will cleave the colourless substrate 5-bromo-4-chloro-3-indolyl-β-D-glucuronide (X-Gluc) to produce a blue product allowing the L-form distribution in plant tissue to be observed. This would involve inserting [http://parts.igem.org/Part:BBa_K330002 part:BBa_K330002] into our bacteria. We also started a rough design of the BioBrick, selecting a promoter, Ribosome binding site and antibiotic marker.

• Basic Lab Skills

Basic Lab Skills

On our first day in the lab, we were briefed on various lab health and safety policies to ensure we maintained a safe working environment. We were then led by our supervisors on a tour around the lab to inform us about the layout. Once we were familiarised with everything, we officially started our first lab session.

We started by callibrating our pipettes and learning how to operate them, then we were shown how to innoculate bacteria to a liquid culture. After this we prepared bacteria streak plates.

In the afternoon, we extracted GFP and RFP bricks from the iGEM 2013 biobrick plate and transformed it into pre-prepared Escherichia coli competent cells. These procedures were performed using the protocol received by our supervisor E.coli Transformation. We then plated those cells onto LB with 5ug/ml chloramphenicol plates.

• Basic Lab Skills
• Wiki

Basic Lab Skills

When we first arrived in the lab, we checked on our plates to see if anything grew. The RFP plates showed a lot of collonies, while the GFP plates did not work as expected. The next thing we did was too view the plates under the fluorescent inverted microscope. In the afternoon,we had an introductory lecture on basic molecular biology and biobrick design.

Wiki

The calendar has now been created, with the emphasis on both user interaction (simple and obvious to use) as well as ease of editing (the members of the team not familiar with HTML and JQuery should easily be able and add to the calendar). A rough JQuery script has been written to convert standard wiki MediaWiki code into the format used by the Calendar. This will need extensive debugging before the Calendar can be put into use.

• Wiki

Wiki

The Calendar was fully debugged and deployed over the weekend whilst no one was in the lab. This means that as of tomorrow the entire team will be able to edit and add to the calendar with ease. A brief document has also been written that will provide details on how to edit some of the more complex sections of the wiki. This document will be added to as more and more functionality is added into the wiki.

• Basic Lab Skills
• BioGame
• HBsu BioBrick clonning strategy

Basic Lab Skills

The first thing we did was to transfer collonies of bacteria into LB. Then we extracted the plasmids via (plasmid prep) protocol, and check the concentration of plasmids through the use of nanodrop spectrophotometry. Next,we prepared 1% Agarose and whilst waiting for it to set we performed a single digest with (Xbal or Pstl) and double digest with both restriction digest. Finally, we load our samples to the gel in addition with DNA ladder and control.

BioGame

Work began on the BioGame. Largely contained to simply choosing the best method of implementation for the game. Considered where:

• Android SDK (with no game engine/plug ins)
• LibGDX
• OpenGL
• LWJGL

Ultimately the choice was made to use LibGDX due to the documentation available on it, the ease at which games can be developed and the consistent structure it provides with standard gaming development. After this decision was made, a series of tutorials were found and followed to provide a base of knowledge going into developing the application itself.

HBsu BioBrick Cloning Strategy

The team has been looking in literature for a protein that binds non-specifically to DNA. This will aid the visualization of Genome Shuffling among L-forms by enabling the team to see sections of DNA that have come from two different Bacteria. The decision was made to use the HBsu protein which is encoded by the hbs gene in B.subtilis because it is well characterised and should remain associated with the DNA for a long period of time. The HBsu will be conjugated with a Florescent Protein such as GFP and RFP.

• Wiki work
• HBsu BioBrick Cloning Strategy

Wiki work

We came up with a script, story board and a list of materials needed for the introductory video on our wiki. We had fun learning to crochet in order to create characters for the video. Furthermore, we updated the team profile page on the wiki by adding individual pictures of all team members.

HBsu BioBrick Cloning Strategy

An initial design for the BioBrick has been created. It includes Kanamycin resistance cassette [http://parts.igem.org/Part:BBa_P1003 BBa_P1003], a lacI Promoter under a strong RBS [http://partsregistry.org/Part:BBa_B0034 BBa_B0034], the BioBrick and a double terminator. Golden Braid assembly is planned to be used to create the HBsu BioBrick.

• Gus Reporter BioBrick
• BioGame
• HBsu BioBrick Cloning Strategy

Day Overview

The group started thinking about their cloning strategies for each theme of the project. We also discussed idea for human practices and came up with the idea of an educational game based on synthetic biology. At the end of the day we had a group meeting to discuss our progress and our ideas for the modelling workshop for the UCL meet up.

Gus Reporter BioBrick

We began working on the method for creating our construct. This would involve the use of restriction enzymes, primer design and gibson assembly. We also began creating a protocol for introducing our L-forms into plants.

BioGame

Today the game project was set up, created using the LibGDX-setup GUI in order to make projects for Android, Desktop and HTML deploym ent, all utilising LibGDX's built in features to run off a single "core" project. This was a big deciding factor in the choice to go with LIBGdx for developing the game as it allows us to quickly deploy across multiple platforms should we wish to do so. With the project set up, we have started to create assets such as textures and fonts to be loaded in and used within the game.

HBsu BioBrick Cloning Strategy

Plan to clone it into [http://parts.igem.org/wiki/index.php/Part:pSB1C3 pSB1C3] then PCR the insert before integrating it into the amyE integration plasmid (pSB_Bs1C). Discovered that the Kanamycin resistance is an E.coli version and wouldn't work in the B. subtilis. Work is also being put into finding different antibiotic markers that would work in B.subtilis.

• GUS Cloning Strategy
• BioGame
• HBsu BioBrick Cloning Strategy

GUS Cloning Strategy

We continued work on the cloning strategies as well as starting modelling the gus reporter system using BioNetGen. We produced a preliminary model of the gus reporter system. However, this model needs to be modified by adding parameters. We have also looked through some papers to find parameters required for the model.

BioGame

The Asset class has been created and all currently designed assets loaded into the game. A very simple (and temporary) cartoon bacteria has been loaded in and displayed on the screen along with the team logo. The pre-loading screen itself has not yet been developed but all constructs to create it are now in place. The percentage of loading done is simply outputted to the Java console for debugging purposes..

HBsu BioBrick Cloning Strategy

Designed Primers to be used in the Golden Braid assembly, and checked the melting temperature and self-annealing to make sure they work perfectly. Uses RFP (BBa_E1010) and GFP (BBa_E0040) to conjugate it to the HBsu protein in order to observe the recombination. Get a PCR protocol and Gel extraction protocol.

• GUS Cloning strategy
• HBsu BioBrick Cloning Strategy

GUS reporter gene Cloning strategy

We further developed our cloning strategies and decided on the basic design of our construct. We made a preliminary design of the construct using Gene Designer to give a visual representation of how our construct should look like. From this image, we could see the positioning of all the parts, which will be more convenient for us when we want to devise a method to produce this.

We also improved the logo so it's ready for T-shirt printing.

HBsu BioBrick Cloning Strategy

A discussion with a supervisor revealed that the assembly system might be very time consuming. Ultimately, the decision was made to use DNA 2.0 to synthesis the HBsu BioBrick.

• Groningen plasmid Mini-prep
• BioGame
• HBsu BioBrick Cloning Strategy

Groningen plasmid Mini-prep

We performed a mini prep of the Groningen 2012 integration plasmid DNA grown in E.coli overnight at 37 degrees. The purity was tested using a NanoDrop. Introduction to microfluidics. Start work on designing Master Molds. Check the extracted pDNA to confirm the outcome of the purification of plasmid using the electrophoresis.

The plasmid has been cut with fast digest XbaI and BamHI to confirm the presence of the plasmid in the purified pDNA. Plasmid which has been cut by XbaI or BamHI only gives a linear piece of DNA. The gel shows that well with the DNA cut with both enzymes contains two pieces of DNA. One - plasmid backbone and the other - RFP reporter gene previously inserted into the plasmid. This confirms its identity.

BioGame

Further work on the game architecture has been done today. The main BioBrick class been created to provide common methods that all BioBricks will use. A very basic BioBrick has been created, and can be added upon touch to the Bacteria. This is simply to demonstrate what will happen when a BioBrick is added and the possibilities therein.

HBsu BioBrick Cloning Strategy

Due to the high cost of sequencing, the integration method of the HBsu BioBrick is now to clone the gene construct into the pMutin4 plasmid and use a single cross-over via the amyE gene to integrate it into the bacteria genome. Also the antibiotics marker and promoter is no longer being used because after SCO the whole plasmid will be integrated and as such will contain the promoter Pspac and Kanamycin cassette.

• Preparation for UCL
• B.subtilis Transformation
• Microfliuidics Introduction
• HBsu BioBrick Cloning Strategy

Preparation for UCL

We started preparing for our project presentation at UCL, and we have also started to prepare a presentation for our workshop about BioNetGen modelling.

B.subtilis Transformation

A single colony of B. subtilis strain 168 was picked and transferred into MM media and left to grow at 37oC overnight.

Microfluidics Introduction

Our iGEM team attended a talk about microfluidics given by Sunny Park. Microfluidics is vital to some of our sub-projects, therefore we looked into mechanism of operation and possible used including creation of designs for master moulds on the silicon wafer.

HBsu BioBrick Cloning Strategy

Sent the HBsu-GFP and HBsu-RFP BioBricks off for synthesis. Then, created an overnight liquid culture of LR2 rod B.subtilis cells into NB/MSM media to be used for creating L-form plates and getting microscopic pictures.

• Preparation for UCL
• Transformation

Preparation for UCL

The team continued work on our modelling presentation for the UCL meetup. We added information about ordinary differential equation vs stochastic modelling and about Markov chain.

Transformation

We transferred 1ml of the B.subtilis str. 168, from the previous day, into fresh MM media we then tranformed the bacteria with the Groningen plasmid following the B.subtilis str. 168 transformation protocol. We also made some frozen competent B.subtilis str. 168 in glycerol.

• Preparation for UCL
• Transformation Prep

Preparation for UCL

We began brainstorming what we should cover in our modelling workshop presentation for the YSB 1.0. We decided to first describe biological modelling and talk about stochastic vs differential models. Before introducing BioNetGen,talking about it's benefits and covering the basics of this language.

Transformation Prep

Unfortunately the results of the Wednesday transformation have shown no growth on the chloramphenicol plates apart from a single colony which might be just background growth.

• Transform B.subtilis 168 with Groningen 2012 plasmid and RFP

Groningen plasmid characterisation

In attempts to characterise the [http://parts.igem.org/wiki/index.php?title=Part:BBa_K818000 Groningen 2012 integration plasmid] we tried to transform B.subtilis 168 once again to check for integration at the SacA gene. The transformation was done using the protocol for competent Bacillus subtilis with positive control using the pGFPrrnB plasmid and negative control with the water. We then plated the transformants into LB + 5ug/ml Chloramphenicol plates.

• Grow B.subtilis 168 for transformation
• Set up the sucrose test

Sucrose Test

To check whether the colony on the Cm plate with B.subtilis 168 containing Groningen 2012 integration plasmid actually contained transformant cells rather than a random mutant/contaminant we have decided to perform a sucrose metabolic test, by transferring the culture of into LB + 1% sucrose media and leaving it to grow over night.

Prep for Transformation

In case if the transformation did not work,we decided to Innoculated 5 ml of freshly prepared MM media with B.subtilis str.168 colonies to grow overnight.

• Transforming B.subtilis 168
• Results of sucrose test

Sucrose Test

We have checked the pH of the solution of cells from the Cm plate with Groningen 2012 integration plasmid incubated in sucrose rich media overnight to check for presence of acidic metabolites of sucrose and hence the activity of AmyE. The results were not comforting, the pH of the both samples we have prepared was the same as the pH of the +ve control (i.e. Bacillus 168 cells): 4.7, 4.8, 5.04.

Transformation

We have finished transforming B.subtilis 168 cells with Groningen 2012 integration plasmid and with pGMP (+ve control) and no plasmid at all (-ve control). Plated the colonies out according to the protocol and left to grow over night.

• Check the results of transformation
• Set up the test for Amylase

Transformation Results

Amylase Test

Just to make sure that the pGMP plasmid was integrated in all of the colonies, we have transferred a few colonies onto a freshly made LB + Starch agar plates for tomorrow, to check the amylase function using the iodine test for starch.

• Modelling Presentation
• Checking starch plates

Modelling Presentation

We made a few changes to our modelling presentation and practised our delivery in preparation for the presentation to members of the school of bioinformatics.

Checking Starch Plates

The starch plates were checked from yesterday and it was found that they were overgrown. So more starch agar plates were made including the antibiotic chloramphenicol (Cm) in the media. After these plates were made, colonies were transferred directly onto the plates and were left overnight.

• Workshop Practice Presentation
• Starch test

Workshop Practice Presentation

We gave a workshop practice presentation to members of the school of bioinformatics. It was decided that we shouldn't talk about the subtilin two-components system model, because it might be too complex for our workshop. It was suggested that our workshop needed to be a little less like a presentation, with more interaction for the participants.

Starch test

The starch plates were checked and a lawn of bacteria was found. The starch test was done anyway using vaporised iodine. The test showed a positive result for pGFP as it turned black showing no amylase was present and there for it had transformed. The B.subtilis (positive control) did not go black because the starch was consumed by the bacteria as expected. Also E.coli was left with the Groningen plasmid in 10ml of LB over the weekend for purification. This was done because stocks of the Groningen plasmid were running low.

• Updated SGM tutorial
• Finalized workshop presentation

SGM tutorial

We incorporated a section in the SGM tutorial about modelling. It is difficult deciding what information is best to include, and what to leave out. We were also thinking about using same exercises we are going to use in the workshop.

UCL Presentation Practice

We went through the UCL presentation with everyone on the team. After the presentation, everyone on the team gave feedback on how to improve certain slides and made note of what changes to make.

Workshop presentation

The slides for the workshop were edited accounting for Friday's feedback, and the finishing touches made. We also began producing a handout with exercises to complete during the workshop.

We incorporated our modelling into the SGM tutorial

• Modelling Workshop
• Plasmid mini prep

Modelling Workshop Feedback Form

We produced a feedback form for attendees of our Workshop. This will be useful to access our workshops success and to improve its content for any future occasions we deliver a modelling workshop.

Plasmid mini prep

The Groningen plasmid was purified using plasmid mini prep of previously prepared E.coli. The purity was checked using the NanoDrop and a result of 183.7 was obtained meaning the DNA was usable in subsequent protocols. Also preparation for B.subtilis transformation was carried out; 5 ml of freshly prepared MM media was inoculated with B.subtilis 168 colonies to grow overnight.

• B.subtilis transformation
• Receiving L-form Strain

B.subtilis transformation

The B.subtilis transformation was carried out again to see if it would successfully integrate the Groningen plasmid when a lower concentration of Cm antibiotic is used in the plates. The plates used include:

• B.subtilis transformed with 10µl Groningen plasmid on 5µg/ml Cm, 12.5µg/ml Cm, Amp and LB
• B.subtilis transformed with 20µl Groningen plasmid on 5µg/ml Cm and 12.5µg/ml Cm
• B.subtilis transformed with 10µl pGFP (positive control) on 5µg/ml Cm, 12.5µg/ml Cm
• B.subtilis with water (negative control) on 5µg/ml Cm, 12.5µg/ml Cm and Amp

Receiving B.subtilis L-Form

Today we received two plates of B.subtilis L-Form on a LB + 0.8% Xylose plate, courtesy of Dr. Ling Juan Wu, which contains the original switch brick(BioBrick incompatable). One of the L-form has a GFP marker on its genome, and the other contain RFP. We also received the sequence of this strains genome.

• Making sucrose and glucose agar
• Chromosomal Extraction

Making sucrose and glucose agar

The transformation plates were checked. Both sucrose and glucose agar was made, left to cool, plated and left to set. Then the colonies from the transformation plates were plated out onto the agar that was made. Both B.subtilis with the Groningen plasmid and B.subtilis alone (negative control) were put onto both sucrose and glucose plates.

Extracting Chromosome from the B. subtilis received

Using the protocol and kit supplied by Qiagen, we extracted the chromosome out of the B. subtilis that contain the Switch Brick in it. The spec reading showed that the DNA is actually present and to prevent the chromosome to be degraded it was stored in -20oC.

• YSB 1.0 Conference
• Modelling Workshop

YSB 1.0 Conference

The team travelled down to London for the Young Synthetic Biologists conference with the other UK iGEM teams. On arrival at the conference, the team put up their poster for display and proceeded to listen to other teams giving presentations about their projects. After lunch Yana, Geoff, Justas and James gave a modelling workshop on Rule Based Modelling with BioNetGen. During this time other team members attended various workshops about BioArt and public engagement. Discussions were ongoing throughout the day regarding teams posters and our own project.

More details can be found on the YSB1.0 page.

• YSB 1.0 Conference
• Presentation

YSB 1.0 Conference

On arrival at the second day of the conference the team had the opportunity to view the posters and projects of other teams. A 10 minute presentation about our project was also given, followed by 5 minutes of questions. The presentation was very well received, resulting in many interesting questions and generating a lot of interest for the project. The entire conference split into groups after the presentations to discuss topics including modelling, wiki design, parts characterisation, human practices and SynBioSoc.

More details can be found on the YSB1.0 page.

• Sequence Analysis
• Primer design

Switch Brick Sequence Analysis

We looked through the chromosomal sequence of the L-form B.subtilis we acquired from Dr. Ling Juan Wu, and locate the region (ranging from the pbpb upto the murE gene) and sequence of Switch Brick. Inside the strain that we received, the Pxyl and the Chloramphenicol resistance gene were already present in the region so it saved us a bit of work not needing to clone it in. However, the sequence contains multiple illegal restriction sites for BioBrick (EcoRI and PstI). To fix this issue, we decided to alter the sequence where the restriction sites is into a synonymous changes (no AA changes). The Switch Brick sequence is then sent off to DNA 2.0 for synthesis. Whilst waiting for the synthesis BioBrick to arrive, we will be using the current Switch BioBrick which contain EcoRI and PstI in it for our experiment.

Primer design for switch BioBrick

We designed primers to clone out and amplify the switch BioBrick from the strain that we received.

The primers were as follows:

BBa_K1185000_1_Forward Primer 5’ AAATTCTAGAGCAAAAGAAAGCAAAAGAGGA 3’ consist of (20bp + XbaI tag + 'AAA')

BBa_K1185000_1_Reverse Primer 5’ AAATACTAGTATTGTCCCTGTTATCCCAAT 3’ (19bp + SpeI tag + 'AAA')

• Making Plant Agar Plates
• Sucrose test set up

Making Agar Plates for our Plants

Today, we made up some Murashige and Skoog Medium (M&S Medium). This medium was ordered in powder form and water had to be added to it to be made into a solution. The solutions were then autoclaved to be used to make the agar for growing plants. After the solutions are done autoclaving, we made some agar with the M&S Medium. We weighed out 3.0g of agar no.2 into 2x500mL bottles. 250mL of M&S Medium was then added and mixed. The agar was then autoclaved and then cooled at 50 degree Celsius. When it is ready to be poured, we poured the agar onto 25 plates and left it to set.

Sucrose test set up

The plates from Thurs 11th were checked and inconclusive results were found as the agar was cloudy and individual colonies were not clear. For this reason a sucrose test was set up to see if the cells containing the Groningen plasmid from the plates (from Thurs) had integrated the plasmid, consequently interrupting the sacA gene and so failing to metabolise sucrose and showing as more basic. For a positive control we used B.subtilis and sucrose (this was expected to be acidic) and our negative control was LB and sucrose (this was expected to be more basic as no metabolism). These cultures were left overnight.

• Sucrose test
• Transformation preparation
• Planting Seeds
• Shape-shifting modelling

Sucrose test

The sucrose test was carried out on the overnight cultures using a PH meter. The results observed were as follows:

• LB + sucrose + B.subtilis = 5.15
• LB + B.subtilis = 6.77
• LB + Groningen plasmid + sucrose = 4.23
• LB + Groningen plasmid = 6.75
• LB + sucrose = 7.07

These results show that cells with the Groningen plasmid had functional sucrase showing the plasmid has not been integrated so colonies must have been contaminants.

Transformation preparation

Preparation for B.subtilis transformation was carried out; 5 ml of freshly prepared MM media was inoculated with B.subtilis 168 colonies to grow overnight. Also E.coli with Groningen plasmid was put in LB media and left to grow overnight.

Planting Seeds

We washed and planted cabbage and french dwarf bean seeds in preparation for the introduction of L-forms into seedlings following the Production of L-form containing Plants protocol up to and including step four. The seeds were planted in Murishage and Skoog containing petri dishes and placed in a dark cupboard to germinate.

Shape-Shifting modelling

Modelling tasks for the shape-shifting team were identified:

1. Model cell shape using cytoskeleton structure
2. Model cell growth
3. Limit the growth of the cell by a certain shape (star or triangle)
4. OPTIONAL Change the membrane rigidity parameters and run the simulation again.

The shape of the cell is influenced by membrane fluidity and structure of the cytoskeleton. As cytoskeleton is present in both eukaryotic and prokaryotic cells. The former cells have no cell wall, so it is reasonable to assume that the shape of the L-form cell would obey similar rules as eukaryotic cell would. It has been determined that cytoskeleton behaves as an isotropic fluid. Therefore it's realsonable to rely on two-phase flow modelling frame (Holmes, Edelstein-Keshet, 2012).

• Innoculating Plants with L-forms
• Groningen Plasmid Mini-prep
• B.subtilis Transformation

Innoculating Plants with L-forms

We checked the seeds we planted yesterday and observed that the cabbage seeds had begun to germinate. This meant that they were ready to absorb L-forms. We soaked 5 cabbage seeds for 3 hours in 5ml of L-form solution and another 5 seeds in 5%(w/v) mannitol solution to act as a control. The seeds were then washed with distilled water (to lyse extracellular L-forms) and replated on Murishage and Skoog agar plates. This was done following the Production of L-form containing Plants protocol from stage five onwards.

Groningen Plasmid Mini-prep

We performed a mini prep of the Groningen 2012 integration plasmid DNA grown in E.coli overnight at 37 degrees. This was done in 8 micro centrifuge tubes. The purity of each was tested using a NanoDrop.The average purity of the 8 tubes was 324ng/µl.

B.subtilis Transformation

The B.subtilis transformation was carried out again to see if it would successfully integrate the Groningen plasmid when a higher concentration of the plasmid was used. The plates used include:

• pGFP (positive control)on 5µg/ml Cm and 12.5µg/ml Cm

• Groningen plasmid 30 µl on 5µg/ml Cm and 12.5µg/ml Cm

• Groningen plasmid 45 µl on 5µg/ml Cm and 12.5µg/ml Cm

• Groningen plasmid 60 µl on 5µg/ml Cm and 12.5µg/ml Cm

• Water (negative control) on 5µg/ml Cm and 12.5µg/ml Cm

• Check the Transformation Plates
• Modelling

Transformation results (Groningen plasmid)

The results of the last transformation of B.subtilis with Groningen 2012 integration plasmid look promising. Everything has worked as expected. The insignificant difference in the number of colonies grown on plate with cells inoculated with different amount of plasmid indicates that the transformation occurred as efficiently as it could at around 9ug of DNA per reaction tube. The reason why nothing grew on the plates with 12.5ug/ml of chloramphenicol may be the inefficiency of the promoter used. The colony counts are recorded in a table below.

To confirm the integration of the plasmid the test for sucrose metabolism will be carried out on Monday.

Modelling

Preparation work for modelling, learning to use VCell software. We started working our way through simple tutorials to get more familiar with the program before doing "real work".

Cell Shape model 

The structure and function of cytoskeleton were studied. The cell behaves like an isotropic fluid in terms of shape and movement, therefore some of the factors which influence the shape could be identified: Cell Volume, surface area, surface tension, hydrostatic pressure.

It turns out that eukaryotic cytoskeleton is characterised as a two-phase viscous, responsive and contractile liquid. If bacterial cytoskeleton is similar, it would complicate the modelling by a fair bit. More insight into the structure and physical properties of bacterial cytoskeleton is needed. In terms of cell growth and division it will be useful to look into the properties of FtsZ and MreB as well as properties of the vesicular membrane and physical triggers of the process of 'blebbing'. So that's a job for Monday.

• Made SMM media
• Made sucrose and glucose agar
• Creating L-forms
• BioGame

Made SMM media

More SMM media was made, in order to make the sucrose and glucose plates which will be used to test if the Groningen plasmid has been integrated.

First trial on creating B.subtilis L-form

We created L-forms using the plate of B.subtilis rod cells (containg the switch BioBrick) that Dr. Ling Juan Wu provided us on the 15th July. This was carried out using two different methods; Direct Method and Protoplasting to generate L-form. Both protocols were successful in creating L-forms.

Made sucrose and glucose agar

Both sucrose and glucose agar was made, and sent for auto claving

BioGame

Work restarted on the BioGame. The Sprite class has been extended to cope with both static and animated Sprites utilising Sprite Sheets. An animated background has been created for the game and further work is planned on the user interface in the coming days.

• Tested the Lysozyme Protoplast Formation Protocol
• Sucrose and Glucose test
• Improving the poster design

Tested the Lysozyme Protoplast Formation Protocol

The rest of the team members tested the protocol and further suggestions for improvement were made. Despite the suggestion, all teams were successful in creating L-forms. (microscope picture)

Sucrose and Glucose test

The agar was melted on a heat plates for half an hour, left to cool, plated and left to set in the fume cupboard. Then the colonies from the transformation plates were plated out onto the agar. Both B.subtilis with the Groningen plasmid at concentrations of 30, 45 and 60 µl and B.subtilis alone (negative control) were put onto both sucrose and glucose plates.

Improving the poster design

Progress on the poster design was made by thinking of different alterations to the layout to make the poster more readable. The favorite was selected as a starting point for the final design.

• Sucrose and Glucose plates
• Poster design
• Wiki
• BioGame

Sucrose and Glucose plates

Both the Sucrose and Glucose plates overgrew which means that the Groningen plasmid is not integrated. our next step is to consider whether to sequence the plasmid using the BioBrick primers.

Poster Design

Today, the layout was developed further and shown to the group. The next steps would be to introduce the text, logos and illustrations.

BioGame

A loading bar has now been added for the BioGame, providing the user graphical representation of how long they will be waiting for the game to load. This then opens into the main game screen where your Bacterium can be seen. The next stage is to add the User Interface allowing the user to "take care" of their Bacterium and install BioBricks.

• PCR Switch BioBrick
• Planting Seeds

PCR Switch BioBrick

The Primers ordered to clone the Switch BioBrick arrived. Using the chromosome extracted from the B. subtilis which contain the Switch BioBrick we perform PCR to amplify the BioBrick. The spectophotometer reading for the PCR product showed good results, however when running it on agarose gel to check for the size it didn't show (expected product around 2,666bp).

Planting Seeds

We washed and planted chinese cabbage seeds in preparation for the introduction of L-forms into seedlings following the Production of L-form containing Plants protocol up to and including step four. The seeds were planted in Murishage and Skoog containing petri dishes and placed in a dark cuboard to germinate.

• Cloning Switch Brick via PCR
• Travel Arrangements
• L-form culture contaminate
• Treating Plants with L-forms

PCR Switch Brick

We performed another round of PCR to amplify the Switch BioBrick from the extracted chromosome. The spec reading show good results, and we run an agarose gel to confirm its present. From the gel we can see a ban around 2,000-3,000bp region, and our BioBrick is around 2,600bp this conclude that we have successfully amplified our BioBrick.

Travel Arrangements

Research was done into the most convenient way to travel to the regional jamboree in Lyon in October. A spread sheet was made of the different travel options so a balance could be found between cost and time efficiency. This included timings, prices and duration of trains, flights and buses.

CONTAMINATION by Staphylococcus aureus

We checked our stocks L-form culture under the inverted microscopes and found out that all of the culture have been contaminated by S. aureus.

Treating Plants with L-forms

The above mentioned S. aureus contamination means we do not have any L-forms to wash our seedlings in and so cannnot continue with the Production of L-form containing Plants protocol. We will have to grow new seedlings once we have some L-forms free from contamination.

• Creating L-form
• MM media innoculation
• Cell wall synthesis modelling

Creating L-form culture

Using the Protoplasting protocol, we converted both of the L-form strains we possess (GFP and RFP marker) into L-form. We left them to grow for 2 days in 30oC incubator.

Preparation for B. subtilis Transformation

Innoculate 10ml of MM medium with B.subtilis str.168 and left to grow overnight in 37oC for preparation of Transformation.

Cell wall synthesis modelling

Found a model of Peptidoglycan biosynthesis in B.subtilis on the BioModels Database. Generated automatically from the Kegg pathway, so the model is quite complicated and unclear. We plan on converting the SBML to bngl (i.e. useable in BioNetGen and adding the ability to switch the cell wall on and off- simulating our main BioBrick

• Tranforming with Switch BioBrick
• Cell Shape Model

Cell Shape Model

Substantial progress was made towards the understanding of fundamental approaches to mathematical modelling. Dr. David Swailes from the Department of Mechanical Engineering has kindly agreed to help us with our task. It was thought sensible to divide the project into three parts. First model the growth of the vesicle which is not limited by anything, then model the process of growth in a confined environment from the time just after the vesicle grows to touch the sides of the chamber, followed by a model of the transition between the two phases. Tasks for Wednesday: research more on the physiology of the vesicle growth.

B. subtilis transformation

Using the overnight B.subtilis strain.168 grown in MM media we carried out the transformation protocol and transformed them with our naked PCR switch brick product and pGFPrrnb (as a control). We then plated the B.subtilis transformed with pGFPrrnb onto LB agar + Chloramphenicol (5ug/ml) plates, and plated out the B.subtilis with the switch brick onto LB agar + Chloramphenicol (5ug/ml) + Xyl 0.8% plates.

• Checking results of Transformation
• Visualising L-forms under Microfluidics
• Translating the cell wall model

Transformation Results

As it turns out the naked PCR product Switch BioBrick failed to be transformed, whilst the possitive control worked. We found out that the efficiency and probability of transformation to works with just naked PCR product is very low. So, we then planned to clone it into a plasmid first before transforming it into our Bacillus subtilis.

Visualising L-forms under Microfluidics

We created a silicon wafer of the mother machine using the master mold courtesy of Sunny Park. Once the wafer set we removed any impurities using a combination of dd.H2O, acetone, and isopropanol. In order to let the silicon wafer hold together we heated with plasma under vacuum condition. We then load L-forms with two different tags on them (GFP and mCherry expression). The results showed potential endosymbiosis or cell fusion between the L-forms.

Cell wall modelling

Opened the peptidoglycan biosynthesis model in copasi, to try and understand what was happening. The species names were particularly complicated so we attempted to simplify them, whilst making clear what was being referred to. There are 54 species so this took some time.

• Plasmid (pGFPrrnb) amplification
• L-Form simulation

Plasmid (pGFPrrnb) Amplification

We transformed the competent E.coli strain DH5alpha with plasmid pGFPrrnB taken from the spring 2013 BioBrick distribution kit using the [E.coli transformation protocol]. We then innoculated B. subtilis, from the yesterdays transformation plate, which contained pGFPrrnb into LB + Chloramphenicol (5ug/ml).

L-Form simulation

Started working on Java based application to simulate L-form behavior. Current goal is to make something simple, maybe moving circles?

• L-Form simulation
• E.coli Innoculation
• Cloning switch brick

L-Form simulation

Started programming L-form genomic fusion simulation using Java. So far everything went smoothly, we have some bacteria basic movement mechanics, and soon will be looking into how to make two bacteria fuse when they meet together.

E.coli Innoculation

We innoculated the transformed E.coli (pGFPrrnb) that we did yesterday into LB.

Cloning switch brick

We extracted our pSB1C3 plasmid from the BioBrick distribution kit. Through the use of restriction enzymes (XbaI and SpeI) we cut out the RFP insert from the MCS of the plasmid. We ran the digested product on a 0.8% agarose gel and purified the DNA (plasmid backbone) through the use of [gel extraction purification].

We checked the concentration of the purified DNA through nanodrop (spectrophotometer)and it turned out that no DNA was present in the solution. This was due to too much elution buffer that was added to elute the DNA. THis resulted in a very low concentration, and we will not be able to continue the [ligation protocol]. This protocol will need to be repeated the next day.

• Cloning Switch Brick
• Transforming HBsu-(x)fp BioBrick
• BioGame

Cloning Switch Brick

We started off by extracting the [http://parts.igem.org/wiki/index.php/Part:pSB1C3 pSB1C3] plasmid with RFP marker through Miniprep from the E.coli liquid broth. We performed a double digest using XbaI and SpeI to isolate the insert from the plasmid backbone. We then ran the digested sample through gel electrophoresis to separate out the different parts. Through the use of gel extraction kit and protocol, we cut out the band of interest which was around 2000bp (the backbone). We then ligate the backbone with predigested switch brick through the use of T4 ligase via sticky end ligation in a 1:3 ratio. We left the ligated product in the 4 degree fridge.

Transforming HBsu-(x)fp BioBrick

The synthesised construct arrived fully cloned into the pMutin4 plasmid from DNA2.0 and we rehydrated the DNA by adding 10ul of elution buffer. We transformed the plasmid into competent E.coli DH5-alpha and plated it out on LB + Amp plate.

BioGame

Work recommenced on the BioGame with the beginning of the User Interface creation for the main game screen. This began by simply designing some basic sprite sheets for the button states, and then moved on to creating the button class. The button class started off by extending my own Sprite class, choosing to not use LibGDX's built in sprite or button class. I feel this would give me more control over the functionality of the objects, also as some of the documentation on the built in button class is a little light, it means I know exactly what it is doing.

• Amplifying Switch Brick
• E. coli inoculation
• BioGame
• L-Form simulation

Amplifying Switch Brick

We transformed the pre-prepared competent E. coli DH5α cells with the Switch Brick that we have cloned in to the psB1C3 plasmid yesterday. These were then plated on to LB+chloramphenicol 5μm/ml and incubated at 37°

E. coli incoluation

We took E. coli DH5α that has been transformed with HBsu-GFP/HBsu-RFP BioBrick from the plate that was made yesterday and inoculated them onto LB to let them grow before extracting the plasmid out.

BioGame

Further work has gone into developing the buttons, having now written the code for hit testing the clicks on the button. This code is a little buggy but will be improved as the program is progressed. Started to create the sub-menu that will appear when the "Install BioBrick" button is clicked. Currently this is just a blue box that will eventually contain a list of installable BioBricks.

L-Form simulation

It's starting to look good, as a base for our L-Form simulation Ball game [http://www.ntu.edu.sg/home/ehchua/programming/java/J8a_GameIntro-BouncingBalls.html tutorial] was used. We managed to get couple balls moving around and colliding with each other.

• HBsu-(x)FP BioBrick Extraction
• Cloning HBsu-(x)FP BioBrick into psB1C3 Plasmid
• B. subtilis str.168 Competent Cell Prep
• BioGame

HBsu-(x)FP BioBrick Extraction

Using the QIAgen Mini-Prep protocol we extracted the HBsu-RFP & HBsu-GFP BioBricks from the E. coli. We checked the concentration & quality of the plasmid using a spectophotometer, it showed a good quality (HBsu-GFP: 67.5 ng/μl, HBsu-RFP: 55.5 ng/μl).

Coloning HBsu-(x)FP BioBrick into psB1C3 Plasmid

Our HBsu-(x)FP BioBrick was initially cloned into the pMutin4 plasmid, in order to submit this BioBrick to the iGEM repository it needs to be cloned into a psB1C3 plasmid. In aid of this, we cut our BioBrick and the linearised psB1C3 plasmid from iGEM using EcoRI and PstI. We then attempted to purify the BioBrick using the gel extraction protocol, however we couldn't see any bands. So because of this we'll have to reattempt the protocol tomorrow.

B. subtilis str.168 Competent Cell Prep

Detail needed!!

Planting Seeds

We washed and planted chinese cabbage seeds in preparation for the introduction of L-forms into seedlings following the Production of L-form containing Plants protocol up to and including step four. The seeds were planted in Murishage and Skoog containing petri dishes and placed in a dark cuboard to germinate.

BioGame

Upon adding buttons into the Install BioBrick sub-menu, it was noted that any button placed over the top of the clicked button on the parent menu is started off in the "over" position and as such is automatically registering a hit. To solve this the hit test code as been completely refactored for a more accurate hit test. To aid this, ActionListeners have been added into the Button class so as to handle the desire events upon click. This will enable coders to write anonymous classes for attaching to individual buttons.

• Inoculating Plants with L-forms
• B. subtilis Transformation of HBsu-(x)FP
• Digest pMutin4 HBsu-GFP and HBsu-RFP

B. subtilis Transformation of HBsu-(x)FP

We followed the bacillus transformation protocol to transform B. subtilis HBsu-GFP and HBsu-RFP into pMutin4. We then plated it out on LB + ery (5ug/ml) plates that were made earlier today.

Plates:

HBsu-GFP on LB + ery (5ug/ml) plates x2

HBsu-RFP on LB + ery (5ug/ml) plates x2

rrnB on LB + ery (5ug/ml) plates x2 (positive control)

Water on LB + ery (5ug/ml) plates x2 (negative control)

Cell in LB x2 (to check viability of cells)

Digest pMutin4 HBsu-GFP and HBsu-RFP

We digested the pMutin4 HBsu-GFP and HBsu-RFP by fast digest from promega. The reaction we ran was:

45ul DNA

1ul 10x fast digest buffer

1ul PstI

1ul EcoRI

2ul Water

Total: 50ul

We left this at 37 ̊C for 3 hours.

Then we also cut the linearised pSB1C3 backbone that was sent from iGEM using the same restriction enzyme. The reaction used is:

4ul of DNA (25ng/ul)

4ul of master mix (Contains restriction enzyme EcoRI and PstI)

After the digest we kept it in the -20 ̊C freezer.

Inoculating Plants with L-forms

We checked the seeds we planted yesterday and observed that the chinese cabbage seeds had begun to germinate. This meant that they were ready to absorb L-forms. We soaked 20 cabbage seeds for 3 hours in 5ml of L-form solution and another 20 seeds in 5%(w/v) mannitol solution to act as a control. The seeds were then washed with distilled water (to lyse extracellular L-forms) and replated on Murishage and Skoog agar plates. This was done following the Production of L-form containing Plants protocol from stage five onwards.

• L-form Protocol
• Transformation of HBsu-(x)fp
• Plant Microscopy
• Project Description Due

Wiki

We finalized the project description and put it onto the wiki page.

L-form Protocol

We did the L-form protocol to create more L-forms. Using this protocol, we created 4 flasks of L-forms which has HBsu-GFP tag on them.

Transformation

The transformation conducted yesterday did not work after checking the plates. Only thing that grew was control in normal LB.

Plant microscopy

Today we viewed the seedlings, that we had washed with L-forms yesterday,using bright field and fluorescence microscopy. When viewing an L-form washed seedling using fluorescence microscopy we noticed clearly defined green circles in several different areas of the plant. These were of the correct size (about 0.5um) to correspond to our GFP labelled L-forms. No such green circles were found in our control that had been washed in mannitol solution instead of L-form solution. These results are encouraging as they indicate we may have successfully inoculated plants with L-forms, although more evidence is needed. We also decided that when we next grow L-forms in plants, we should wash some seedlings in a solution of bacteria with cell walls to see if these can be taken up by plants.

• Preparing Competent Cells
• L-form Growth Curve
• Planting Seeds
• L-Form simulation

Preparing Competent Cells

Prepared competent cells by putting B. subtilis 168 in 10ml MM Media and left it to grow overnight

L-form Growth Curve

We started doing the L-form growth curve. Initially we took OD reading of the L-form we grew over the weekend with a spectrophotometer. The OD obtained was 0.246. We then diluted the solution down to get an OD of 0.05. That solution was then used to create the L-form growth curve. The initial readings of the two L-form samples were 0.05 and 0.046.

Planting Seeds

We washed and planted chinese cabbage seeds in preparation for the introduction of L-forms into seedlings following the Production of L-form containing Plants protocol up to and including step four. The seeds were planted in Murishage and Skoog containing petri dishes and placed in a dark cuboard to germinate.

L-Form simulation

In last couple days we tried adding fusion, which was kind of hard to do, but in the end we succeeded doing that(although it still has couple of bugs, we will fix them asap).

• B. subtilis transformation protocol
• Cloning HBsu-GFP and HBsu-RFP into pSB1C3
• Inoculating Seeds
• L-form Growth Curve
• Anything

B. subtilis transformation protocol

We followed the B. subtilis transformation protocol.

Plates:

HBsu-GFP on LB + ery (5ug/ml) plates x2

HBsu-RFP on LB + ery (5ug/ml) plates x2

rrnB on LB + ery (5ug/ml) plates x2 (positive control)

Water on LB + ery (5ug/ml) plates x2 (negative control)

Water on LB + Cm (5ug/ml) plates x2 (negative control)

Cell in LB x2 (to check viability of cells)

Digest pMutin4 HBsu-GFP and HBsu-RFP

We digested the pMutin4 HBsu-GFP and HBsu-RFP by fast digest from promega.

The reaction we ran was:

45ul DNA

1ul 10x fast digest buffer

1ul PstI

1ul EcoRI

2ul Water

Total: 50ul

We left this at 37 ̊C for 3 hours.

After we linearized the plasmid, we ran a gel to confirm the size. We cut out the fragment of interest of HBsu-RFP and HBsu-GFP using the transilluminator and performed the gel extraction protocol. After this was conducted we checked the nanodrop reading to find out the concentration of DNA which turned out to be for 20ng/ul HBsu-RFP and 17 ng/ul for HBsu-GFP). We then ligated them to the cut backbone that was done on the august 17th. Using the T4 ligase we ran a 1:1, 1:3, 1:5 and control for each sample. We then let it react in the thermocycler at 22 ̊C for an hour and stored at 4 ̊C overnight.

Inoculating Plants with L-forms

We checked the seeds we planted yesterday and observed that the chinese cabbage seeds had begun to germinate. This meant that they were ready to absorb L-forms. We soaked 20 cabbage seeds for 3 hours in 5ml of L-form solution and another 20 seeds in 5%(w/v) mannitol solution to act as a control. We also created another control by soaking 20 seeds in B. subtilis rod cells. The seeds were then washed with distilled water (to lyse extracellular L-forms) and replated on Murishage and Skoog agar plates. This was done following the Production of L-form containing Plants protocol from stage five onwards.

L-form Growth Curve

We took the OD reading of the samples and an OD of 0.08 and 0.09 was obtained

• Transformation
• Competent Cells Preparation
• L-form Growth Curve
• Plant Confocal Microscopy

Transformation

The transformation conducted on August 13th worked. We took some colonies and plated it on a starch plate we made earlier so the iodine test could be performed to confirm that HBsu-RFP and HBsu-GFP has integrated into the amyE region.

Plates:

HBsu-RFP

HBsu-GFP

168 BSB1 (negative control)

pGFP-rrnB (positive control)

Competent Cells Preparation

We inoculated some XL1-B in 10ml of LB overnight to use in the next day to prepare competent E.coli cells.

L-form Growth Curve

We took the OD reading of the samples and an OD of 0.1 and 0.12 was obtained

Plant Confocal microscopy

Today we viewed our plants using confocal microscopy to try and detect any GFP-labelled bacteria. After viewing a few seeds washed in L-form solution under the microscope, we found a green fluorescing dot in the correct size range to be an L-form. No green dots were found in the rod cell or mannitol controls. Following these results we have decided to use confocal microscopy four days after washing our plants in L-form solution, rather than after one. As this co-insides with when [http://www.ncbi.nlm.nih.gov/pubmed/12859751 Tsomlexoglou et al.] used PCR to detect L-forms in their chinese cabbage.

Figure 1. Possible L-form inside Chinese cabbage. The bright green dot is the correct size to be an L-form. The green fluorescence image used to detect the L-form is superimposed onto a bright-field image of plant matter.

Figure 2. L-forms from the solution used to wash the Chinese cabbage.

• Iodine Test
• Making Competent E.coli
• Preparation of IPTG reaction and B. subtilis Transformation
• L-form Growth Curve

Iodine Test

We conducted the iodine test on the starch plates that was produced yesterday.

Observations:

B. Subtilis 168 (Negative control): Halo

B. Subtilis BSB1 (Negative control): Halo

pGFP rrnB (Positive control): No Halo

HBsu-RFP: No Halo

HBsu-GFP: No Halo

When a halo is found, this shows that amyE is functional as it digests the starch around it. When a halo is not found, this means the amyE is non-functional. In this case, it means that the gene fragment has integrated into the amyE region causing it to be non-functional.

Making Competent E.coli

We followed the Competent E. coli protocol and yielded around 200 aliquots of E. coli competent cells.

Preparation of IPTG reaction and B. subtilis Transformation

We inoculated 2ml NB with B. subtilis 168 that is tagged with HBsu-GFP and another 2ml of NB with B. subtilis that is tagged with HBsu-RFP. This is then incubated at 37 ̊C to use for IPTG reaction. We also prepared 10ml of MM media and inoculated it with some B. subtilis 168.

L-form Growth Curve

We took the OD reading of the samples and an OD of 0.06 and 0.07 was obtained

• Transformation of Switch Brick
• L-form Growth Curve
• L-Form simulation

Transformation of B. subtilis

We transformed the switch biobrick into Bacillus subtilis 168 strain. We followed the B. subtilis transformation protocol and plated it out on LB + Cm (5ug/ml) + Xyl (0.8%) plates that were made earlier today.

Plates:

Switch BioBrick on LB + Cm (5ug/ml)+ Xyl (0.8%) plates x1

rrnB on LB + Cm (5ug/ml)+ Xyl (0.8%) x1 (positive control)

168 +Water on LB + + Cm (5ug/ml)+ Xyl (0.8%) plates x1 (negative control)

Cell in LB x1 (to check viability of cells)

We left the plates to grow over the weekend.

L-form Growth Curve

We took the OD reading of the samples and an OD of 0.03 and 0.05 was obtained

L-Form simulation

After fixing bugs with L-Form fusion, simulation is starting to look very good. Next step would be to add L-Form division, which might get complicated, because we will need to have additional objects which would serve as another L-Form.

• Transformation Results
• L-form Growth Curve
• Lyon Presentation
• Planting Seeds

Transformation Results

We checked the transformation plate and it worked as expected.

Switch BioBrick on LB + Cm (5ug/ml)+ Xyl (0.8%) plates x1: Colonies Found

rrnB on LB + Cm (5ug/ml)+ Xyl (0.8%) x1 (positive control): Colonies Found

168 +Water on LB + + Cm (5ug/ml)+ Xyl (0.8%) plates x1 (negative control): No Colonies Found

Cell in LB x1 (to check viability of cells): Colonies Found

This was done to confirm the characterization of our BioBrick.

L-form Growth Curve

We took the OD reading of the samples and an OD of 0.008 and 0.005 was obtained

Lyon Presentation

Started working on the presentation layout for Lyon using [http://www.http://prezi.com/ Prezi]. The team feels this will enable us to create a much more visually appealing presentation, giving us not only the best chance of captivating our audience and conveying our findings, but also winning at the Jamboree.

Initial design ideas have begun along the line of a microfluidics chip being used as a back-drop, with chambers used to contain relevant information (acting as "slides" as such). Along with the design ideas we have also started to compile a list of what information we want to have in the presentation, and how best to present this.

Planting Seeds

We washed and planted chinese cabbage seeds in preparation for the introduction of L-forms into seedlings following the Production of L-form containing Plants protocol up to and including step four. The seeds were planted in Murishage and Skoog containing petri dishes and placed in a dark cupboard to germinate.

• Lyon Presentation
• Inoculating Plants with L-forms
• L-form Growth Curve
• L-Form simulation

Lyon Presentation

The presentation team has started getting to grips with Prezi and trying to find out exactly what it is capable of. We have discovered that the easiest way of creating animations is to create .swf files using Adobe Flash which, luckily, one of our members has a decent amount of experience with. Unfortunately it has also come to light that Prezi does not handle interactive animations well, meaning that animations will work much better if they loop endlessly. Whilst it is possibly to build simply interactivity into the animation, it requires and ActionScript 3.0 "hack" that could result in some unpredictable behavior. In the interest of reliability and owing to not wanting any unexpected events whilst giving the presentation, the interactive elements have been dropped out of the design.

Due to this the microfluidics theme has come under question, as the complexity of it may outweigh the overall result. One team member has, as such, come up with a preliminary design along a different theme. This can be seen in the image below and also by clicking [http://prezi.com/4jcdd8as8qrm/?utm_campaign=share&utm_medium=copy this link].

Inoculating Plants with L-forms

We checked the seeds we planted yesterday and observed that the chinese cabbage seeds had begun to germinate. This meant that they were ready to absorb L-forms. We soaked 20 cabbage seeds for 3 hours in 5ml of L-form solution. We created 5%(w/v) mannitol, B. subtilis rod and E.coli rod controls. The seeds were then washed with distilled water (to lyse extracellular L-forms) and replated on Murishage and Skoog agar plates. This was done following the Production of L-form containing Plants protocol from stage five onwards.

L-form Growth Curve

We took the OD reading of the samples and an OD of 0.00 and 0.00 was obtained. For unknown circumstances, the L-form growth curve instead of increasing steadily throughout the week, it increased during the first 48hrs and then decreased throughout the rest of the week. We will reattempt to construct the L-form growth curve again at a later date.

L-Form simulation

Last couple days were quite busy in terms of L-Form simulation, was trying different ways to make L-Forms divide. Found a quite neat solution which required me to create another list, with empty objects (when L-Forms fuse, 1 of the previous L-Forms become redunandt), but using this method number of L-forms in simulation won't exceed initial number of balls.

• Characterisation of Switch Brick
• Cloning of HBsu-(x)fp pSB1C3 into E. coli XL1-B
• Lyon Presentation

Characterization of switch brick

For the characterization of switch brick, we took some colonies that grew on the 19th and put it in NB/MSM + xyl. We altered the xylose concentration between the range of 0-0.8% by increments of 0.2%. We then left it to grow for 12 hours before checking them under the microscope.

Cloning of HBsu-(x)fp pSB1C3 into E.coli XL1-B

We cloned the ligation product that was obtained from August 13th into competent E.coli XL1-B that was prepared on the August 15th.

Plates:

XL1B + 1:1 HBsu-GFP pSB1C3 on LB + Cm (5ug/ml)

XL1B + 1:3 HBsu-GFP pSB1C3 on LB + Cm (5ug/ml)

XL1B + 1:5 HBsu-GFP pSB1C3 on LB + Cm (5ug/ml)

XL1B + 1:1 HBsu-RFP pSB1C3 on LB + Cm (5ug/ml)

XL1B + 1:3 HBsu-RFP pSB1C3 on LB + Cm (5ug/ml)

XL1B + 1:5 HBsu-RFP pSB1C3 on LB + Cm (5ug/ml)

XL1B + No insert pSB1C3 on LB + Cm (5ug/ml)

Lyon Presentation

The design idea created yesterday has been scrapped to further pursue the microfluidics theme less the abundance of animation & interactivity. Designs are currently being worked on.

• Characterization of Switch Brick Results
• Cloning of HBsu-(x)fp pSB1C3 into E.coli XL1-B Results

Characterization of Switch Brick Results

We checked the samples from August 21st that was growing for 12 hours under the microscope.

No xylose: All L-forms

0.2 xylose: Most L-forms but a few rod cells

0.4 xylose: Few L-forms more rod cells

0.8 xylose: All rod cells

From this result, we can tell that our switch brick works as expected. When xylose is not present, almost all cells are L-forms. When more xylose is present, more rod cells survive.

Cloning of HBsu-(x)fp pSB1C3 into E.coli XL1-B Results

We checked the plates from August 21st where we cloned competent E.coli cells with HBsu-(x)fp pSB1C3. There were colonies for all of the plates except for the negative control. We then inoculate one colony from each sample in to LB and let it grow overnight in order to harvest the plasmid. With the amplified plasmid we could then check that it is the correct size and confirm that cloning has worked.

Figure 1: XL1B + 1:1 HBsu-GFP pSB1C3 on LB + Cm (5ug/ml)

Figure 2: XL1B + 1:3 HBsu-GFP pSB1C3 on LB + Cm (5ug/ml)

Figure 3: XL1B + 1:5 HBsu-GFP pSB1C3 on LB + Cm (5ug/ml)

Figure 4: XL1B + 1:1 HBsu-RFP pSB1C3 on LB + Cm (5ug/ml)

Figure 5: XL1B + 1:3 HBsu-RFP pSB1C3 on LB + Cm (5ug/ml)

Figure 6: XL1B + 1:5 HBsu-RFP pSB1C3 on LB + Cm (5ug/ml)

Figure 7: XL1B + No insert pSB1C3 on LB + Cm (5ug/ml)

• Lyon Jamboree Attendance Fee Due
• Plant Confocal Microscopy

Safety Form

We worked on the safety form that was due in for August 30th. To complete the safety forms, we referred back to some COSHH forms and BioCOSHH forms of the lab for help. We also had to look up some of the bacterial strains we were using. This was to confirm the risk group and possible threats it may pose to the members of the lab, environment, general public and security through misuse. For more information on the safety form please refer to the following link.

Plant Confocal Microscopy

We viewed 7 different Chinese cabbage seedlings washed with L-forms under the confocal microscope. In three of these plants we found clusters of green fluorescent dots about 0.5µm in diameter. We found no clusters of green fluorescent dots in three seedlings soaked in the mannitol control.

Figure 1. Cluster of L-forms inside a Chinese cabbage seedling.

Figure 2. Image of mannitol-soaked control exhibiting faint green auto-fluorescence, allowing us to see the outline of plant cells.

• Planting Seeds
• Miniprep on XL1-B cells with clone product

Miniprep on XL1-B cells with clone product

We conducted a miniprep on XL1-B cells containing the clone product from August 22nd. The spectrophotometer readings were:

HBsu-GFP pSB1C3: 80.7ng/ul

HBsu-RFP pSB1C3: 95.6ng/ul

We then digest the plasmid using EcoRI and PstI fast digest on a 10ul reaction.

8ul of DNA

0.5ul of PstI Fast Digest

0.5ul of EcoRI Fast Digest

1ul of 10x Fast Digest Buffer

Total: 10ul

We let the reaction run at 37 ̊C for 2 hours and ran the digest on a 0.7% agarose gel. After the gel has finished running, we viewed the gel under the transilluminator to check the size of the fragments. The fragments were all of the correct sizes so the cloning was successful.

Planting Seeds

We washed and planted chinese cabbage seeds in preparation for the introduction of L-forms into seedlings following the Production of L-form containing Plants protocol up to and including step four. The seeds were planted in Murishage and Skoog containing petri dishes and placed in a dark cuboard to germinate.

• L-Form simulation
• Characterisation of the HBsu-(x)fp
• Preparation for B. subtilis Transformation

L-Form simulation

Simulation is nearly done, just giving finishing touches. One of them is improving movement of L-forms, so it's more realistic. Although it took a while to figure out the best movement algorithm, at first we tried doing it completely random, but it didn't work out quite well, so in the end we decided it to make not as random. So what we did is that let's say L-form moves 1px in x and y axis per second, so our algorithm would then generate random number from [-2;2] and then would add it up to the current speed. But, because of nature of randomness balls would move too fast or too slow, so we had to make "limits" so it doesn't get too fast or too slow.

Characterisation of the HBsu-(x)fp

We used the B. subtilis 168 strain that has been transformed with HBsu-GFP and HBsu-RFP inoculated on the 15th to characterise the HBsu-(x)fp biobrick. From our cloning strategy, we planned to conduct a single cross over so the whole pMutin4 plasmid including the insert is integrated into the B. subtilis chromosomal DNA. After it has been integrated, our biobrick will be under the control of Pspac promoter. Pspac promoter is an IPTG inducible promoter. In order to characterise the biobrick, we varied the concentration of IPTG from a range of 0.05 – 0.8 mM to observe the conditions that yield the maximum concentration of product. We checked the fluorescence of this fusion protein at 10mins, 30mins, 60mins and 120mins after addition of IPTG to see how long it takes to get the maximum signal. The results of this first trial were not very conclusive as there was cross contamination between sample with IPTG and the control.

Preparation for B. subtilis Transformation

Inoculate the MM Media with B. subtilis that was transformed with HBsu-GFP and HBsu-RFP and was left to grow overnight at 37 ̊C. This is to prepare for transformation with switch brick the next day.

• Transforming Switch BioBrick into HBsu-(x)fp B. subtilis
• Safety Page

Transforming Switch BioBrick into HBsu-(x)fp B. subtilis

We transformed the switch biobrick into Bacillus subtilis 168 strain which already has the HBsu-(x)fp. We followed the B. subtilis transformation protocol and plated it out on LB + Ery (5ug/ml)+ Cm (5ug/ml) + Xyl (0.8%) plates that were made earlier today.

Plates: 168 HBsu-RFP + Switch BioBrick on LB + Ery (5ug/ml)+ Cm (5ug/ml) + Xyl (0.8%) plates x1

168 HBsu-GFP + Switch BioBrick on LB + Ery (5ug/ml)+ Cm (5ug/ml) + Xyl (0.8%) plates x1

168 HBsu-RFP + water on LB + Ery (5ug/ml)+ Cm (5ug/ml) + Xyl (0.8%) plates x1

168 HBsu-GFP + water BioBrick on LB + Ery (5ug/ml)+ Cm (5ug/ml) + Xyl (0.8%) plates x1

168 HBsu-RFP + Switch BioBrick on LBx1

168 HBsu-GFP + Switch BioBrick on LB x1

We left the plates to grow for the next two days.

Safety Page

Having completed the safety form on August 23rd, we started to work on the safety page of the wiki. On the safety page, we included everything in the safety form but in more detail. We also included a detailed account of the lan training program and safety precautions. For more detail, please visit the safety page

• Transforming Switch BioBrick into HBsu-(x)fp B. subtilis Results
• Part submission

Transforming Switch BioBrick into HBsu-(x)fp B. subtilis Results

We checked the transformation that we did previously and the results are the following:

Plates: 168 HBsu-RFP + Switch BioBrick on LB + Ery (5ug/ml)+ Cm (5ug/ml) + Xyl (0.8%) plates x1: Colonies

168 HBsu-GFP + Switch BioBrick on LB + Ery (5ug/ml)+ Cm (5ug/ml) + Xyl (0.8%) plates x1: No Colonies

168 HBsu-RFP + water on LB + Ery (5ug/ml)+ Cm (5ug/ml) + Xyl (0.8%) plates x1: No Colonies

168 HBsu-GFP + water BioBrick on LB + Ery (5ug/ml)+ Cm (5ug/ml) + Xyl (0.8%) plates x1: No Colonies

168 HBsu-RFP + Switch BioBrick on LBx1: Colonies

168 HBsu-GFP + Switch BioBrick on LB x1: Colonies

To check that the transformation with the switch brick works we inoculate some of the cells on the plate into NB/MSM + xyl (0.8%) and NB/MSM only.

Part submission

We worked on submitting three of our BioBrick to the iGEM registry. We put all the basic information about the part including the sequences. Here are the parts: [http://parts.igem.org/Part:BBa_K1185000 Switch BioBrick] [http://parts.igem.org/Part:BBa_K1185001 HBsu-GFP] [http://parts.igem.org/Part:BBa_K1185002 HBsu-RFP]

• Important Deadlines

Team rosters, track selection and project name + abstract are due

• BioBrick DNA Due

The DNA of our BioBricks needs to be submitted to the registry by this date.