Team:Grenoble-EMSE-LSU/Documentation/Biobricks

From 2013.igem.org

(Difference between revisions)
Line 3: Line 3:
<html>
<html>
-
<head>
+
<head>
-
<title>Grenoble-EMSE-LSU, iGEM</title>
+
<title>Grenoble-EMSE-LSU, iGEM</title>
-
<meta http-equiv="content-type" content="text/html;charset=utf-8" />
+
<meta http-equiv="content-type" content="text/html;charset=utf-8" />
-
<meta name="generator" content="Geany 0.19.1" />
+
<meta name="generator" content="Geany 0.19.1" />
-
</head>
+
</head>
-
+
-
+
-
<!-- Chargement CSS -->
+
-
<link rel="stylesheet" href="https://2013.igem.org/Team:Grenoble-EMSE-LSU/Design/Content?action=raw&ctype=text/css" type="text/css" />
+
-
<div class="back" id="doc">
+
<!-- Chargement CSS -->
-
<ul class="texte">
+
<link rel="stylesheet" href="https://2013.igem.org/Team:Grenoble-EMSE-LSU/Design/Content?action=raw&ctype=text/css" type="text/css" />
-
<li id="titre">
+
-
<h1>Biobricks</h1>
+
-
<p></p>
+
-
</li>
+
-
+
-
<li>
+
-
<h2>KillerRed</h2>
+
-
<!-- J'écris ce document avec le balisage HTML déjà mis en place mais vu mon absence d'expérience avec ce language, ne pas hésiter à corriger les erreurs et les lourdeurs qui vont sans doute apparaître. Désolé du bordel! Je sais même pas identer mon code... -->
 
-
<p>KillerRed is a key protein in our bacterial density control system. It represents the light-sensitive element that allows the cells to receive signals from the control device.</p>
+
<div class="back" id="doc">
-
<br />
+
<ul class="texte">
 +
<li id="titre">
 +
<h1>Biobricks</h1>
 +
<p></p>
 +
</li>
 +
 +
<li>
 +
<h2>KillerRed</h2>
 +
 
 +
<!-- J'écris ce document avec le balisage HTML déjà mis en place mais vu mon absence d'expérience avec ce language, ne pas hésiter à corriger les erreurs et les lourdeurs qui vont sans doute apparaître. Désolé du bordel! Je sais même pas identer mon code... -->
-
<h3> Main Functions </h3>
+
<p>KillerRed is a key protein in our bacterial density control system. It represents the light-sensitive element that allows the cells to receive signals from the control device.</p>
-
<br />
+
<h3>Main Functions</h3>
 +
<p>KillerRed is a red fluorescent protein, meaning that by illuminating it with wavelengths from a certain portion of the visible spectrum, it re-emits light in another portion with longer (less energetic) wavelengths. Below is the absorption and emission spectra for the KillerRed protein:<br><br>
 +
INSERT ABSORPTION/EMISSION SPECTRA<br><br>
 +
From the emission and absorption spectra, we can determine that the protein absorbs in the green portion of the spectrum with a peak at 585 nm and emits in the red portion of the spectrum with a peak at 610 nm, hence the name "KillerRed".<br>
 +
Emitted light from bacteria is proportional to the amount of protein in the cells. This allows for measuring protein concentration in a cell culture.<br><br>
 +
The second function of the protein is emission of ROS (Reactive Oxygen Species) when fluorescing.<br>
 +
ROS are highly unstable and react chemically with many substrates including proteins, lipids and DNA. These reactions are oxidative and damage the affected molecules, making ROS toxic to the cell. With sufficient amounts of ROS, a cell's essential components can be damaged beyond repair, and the cell killed. Thus illuminating KillerRed-expressing cells with light in the green portion of the visible spectrum kills them, a mechanism that we use to control cell density in a culture.
 +
</p>
-
<p>KillerRed is a red fluorescent protein, meaning that by illuminating it with wavelengths from a certain portion of the visible spectrum, it re-emits light in another portion with longer (less energetic) wavelengths. Below is the absorption and emission spectra for the KillerRed protein:</p>
+
<h3>Structure</h3>
-
<br />
+
<p>Below is an image of KillerRed's structure as can be seen on the rscb protein data bank:<br><br>
-
<p>INSERT ABSORPTION/EMISSION SPECTRA</p>
+
IMAGE OF THE PROTEIN 3D STRUCTURE FROM PDB HERE<br><br>
-
<br />
+
KillerRed is a 240 amino acid protein with a 3D structure similar to other fluorescent proteins, with an eleven-strand beta-barrel surrounding an alpha-helix containing the chromophore, source of the protein's optical properties.<br>
-
<p>From the emission and absorption spectra, we can determine that the protein absorbs in the green portion of the spectrum with a peak at 585 nm and emits in the red portion of the spectrum with a peak at 610 nm, hence the name "KillerRed".</p>
+
KillerRed has a DsRed-type chromophore formed with residues 67Q (glutamine), 68Y (tyrosine), and 69G (glycine), to make QYG. The corresponding coding sequence can be found at the code segment CAGTACGGC.<br><br>
-
<br />
+
The interesting properties of the protein are directly related to a unique structural difference among fluorescent proteins, consisting in an open channel linking the chromophore to the environment outside the protein. According to litterature, this is the reason KillerRed is able to produce 1000-fold more reactive oxygen species compared to EGFP which is another ROS-producing fluorescent protein.
-
<p>Emitted light from bacteria is proportional to the amount of protein in the cells. This allows for measuring protein concentration in a cell culture.</p>
+
</p>
-
<br />
+
-
<p>The second function of the protein is emission of ROS (Reactive Oxygen Species) when fluorescing.</p>
+
<h3>origin</h3>
-
<br />
+
<p>KR was originally engineered from the anm2CP anthomedusa chromoprotein by individual amino acid mutations in order to obtain fluorescence and an open channel linking the chromophore to the environment.
-
<p>ROS are highly unstable and react chemically with many substrates including proteins, lipids and DNA. These reactions are oxidative and damage the affected molecules, making ROS toxic to the cell. With sufficient amounts of ROS, a cell's essential components can be damaged beyond repair, and the cell killed. Thus illuminating KillerRed-expressing cells with light in the green portion of the visible spectrum kills them, a mechanism that we use to control cell density in a culture.</p>
+
</p>
-
<br>
+
</li>
-
<h3> Structure </h3>
+
<li>
-
<br>
+
<h2></h2>
-
<p>Below is an image of KillerRed's structure as can be seen on the rscb protein data bank:</p>
+
<p></p>
-
<br>
+
</li>
-
<p>IMAGE OF THE PROTEIN 3D STRUCTURE FROM PDB HERE</p>
+
</ul>
-
<br>
+
</div>
-
<p>KillerRed is a 240 amino acid protein with a 3D structure similar to other fluorescent proteins, with an eleven-strand beta-barrel surrounding an alpha-helix containing the chromophore, source of the protein's optical properties.</p>
+
-
<br>
+
-
<p>KillerRed has a DsRed-type chromophore formed with residues 67Q (glutamine), 68Y (tyrosine), and 69G (glycine), to make QYG. The corresponding coding sequence can be found at the code segment CAGTACGGC.</p>
+
-
<br>
+
-
<p>The interesting properties of the protein are directly related to a unique structural difference among fluorescent proteins, consisting in an open channel linking the chromophore to the environment outside the protein. According to litterature, this is the reason KillerRed is able to produce 1000-fold more reactive oxygen species compared to EGFP which is another ROS-producing fluorescent protein.</p>
+
-
<br>
+
-
<h3>origin</h3>
+
-
<br>
+
-
<p>KR was originally engineered from the anm2CP anthomedusa chromoprotein by individual amino acid mutations in order to obtain fluorescence and an open channel linking the chromophore to the environment.</p>
+
-
+
-
<li>
 
-
<h2></h2>
 
-
<p></p>
 
-
</li>
 
-
                        </ul>
 
-
                </div>
 
</html>
</html>

Revision as of 09:41, 30 August 2013

Grenoble-EMSE-LSU, iGEM


Grenoble-EMSE-LSU, iGEM

Retrieved from "http://2013.igem.org/Team:Grenoble-EMSE-LSU/Documentation/Biobricks"