Exeter/19 September 2013

From 2013.igem.org

(Difference between revisions)

Revision as of 14:53, 29 September 2013

OutPut Bricks formed using IDT gBlocks

The gBlocks for our output brick were ligating using the Gibson Assembly protocol. The output brick is responsive to red light, as it contains the specific promoter (BBa_R0082) for the Red Light Module (see our theory page).

The structure of the output brick is such; the specific promoter to correspond to the Red Light Module, a restriction site for the enzyme BglII, an RBS, the coding region for GFP, a restriction site for the enzyme BamHI and a series of STOP codons to act as a terminator. A simple diagram is given below.

(insert diagram)

The gBlocks were ligated and transformed on a previous day; this morning we looked at the liquid cultures we had made of them and noticed that, after centrifuging the cultures in preparation for Miniprepping, some of the cultures had a blue/green tinge. We exposed them to UV light; they were fluorescing green with varying shades of brightness. As the construct is formed from two gBlocks, with the cut between the two some way into the coding region for GFP, this shows that the gBlocks have correctly ligated as GFP is clearly being expressed.

This response, however, is not light-dependant. We should only be getting GFP when the cells are not exposed to red light, but as these cultures were grown in white light (which includes red light) and expressing GFP, this isn't happening. This is because we have transformed the gBlocks into regular competent cells (XL1 or DH5α) which produce the protein which switches on the promoter in front of GFP as part of their normal cellular functions (see our theory page for a more in-depth description of the Red Light Module).

@@ Line 1: / Line 1: @@
 == OutPut Bricks formed using IDT gBlocks ==
-The gBlocks for our output brick were ligating using the Gibson Assembly method. The output brick is responsive to red light, as it contains the specific promoter ([http://parts.igem.org/Part:BBa_R0082?title=Part:BBa_R0082 BBa_R0082]) for the Red Light Module (see our [https://2013.igem.org/Team:Exeter/Theory theory] page).
+The gBlocks for our output brick were ligating using the Gibson Assembly protocol. The output brick is responsive to red light, as it contains the specific promoter ([http://parts.igem.org/Part:BBa_R0082?title=Part:BBa_R0082 BBa_R0082]) for the Red Light Module (see our [https://2013.igem.org/Team:Exeter/Theory theory] page).
-The structure of the output brick is such; the specific promoter to correspond to the Red Light Module, a restriction site for the enzymes <i>BglII</i>, an RBS, the coding region for
+The structure of the output brick is such; the specific promoter to correspond to the Red Light Module, a restriction site for the enzyme <i>BglII</i>, an RBS, the coding region for [http://parts.igem.org/wiki/index.php?title=Part:BBa_E0040 GFP], a restriction site for the enzyme <i>BamHI</i> and a series of STOP codons to act as a terminator. A simple diagram is given below.
+(insert diagram)
+The gBlocks were ligated and transformed on a previous day; this morning we looked at the liquid cultures we had made of them and noticed that, after centrifuging the cultures in preparation for Miniprepping, some of the cultures had a blue/green tinge. We exposed them to UV light; they were fluorescing green with varying shades of brightness. As the construct is formed from two gBlocks, with the cut between the two some way into the coding region for GFP, this shows that the gBlocks have correctly ligated as GFP is clearly being expressed.
+[[File:1231686 710878485592782 109932996 n.jpg|right||300px|Image: 300 pixels|Functioning GFP in our output brick.]]
+This response, however, is not light-dependant. We should only be getting GFP when the cells are <i>not</i> exposed to red light, but as these cultures were grown in white light (which includes red light) and expressing GFP, this isn't happening. This is because we have transformed the gBlocks into regular competent cells (XL1 or DH5α) which produce the protein which switches on the promoter in front of GFP as part of their normal cellular functions (see our [https://2013.igem.org/Team:Exeter/Theory theory] page for a more in-depth description of the Red Light Module).