Revision as of 13:08, 5 August 2009

Blue light Sensor

Overview

The purpose of the sensor is to offset the wanted vanillin concentration. Under influence of the intencity of blue light transcription of the RIBOKEY occurres. The wavelength of the light used to preforme the test is 470nm.

The biology works as follows, YcgF protein is believed to dimerize upon photo-excitation. The YcgE protein is a repressor for the transcription of the mRNA_RIBOKEY, only the dimer form of YcgF is capable of interacting with the operator-bound YcgE, to release it from the DNA and by doing that, starting transcription.

The entire network of interactions is visualized in the diagram below

Models

Regulation of the production of mRNA key by incident blue light

Reactions

Dimerization of YcgF

"Transient Dimerization and Conformational Change of a BLUF Protein: YcgF", [http://pubs.acs.org/doi/full/10.1021/ja065682q]

Sensor interface

"Light Induced Structural Changes of a Full-length Protein and Its BLUF Domain in YcgF(Blrp), a Blue-Light Sensing Protein That Uses FAD (BLUF)" [http://pubs.acs.org/doi/abs/10.1021/bi051820x]

"Influence of a Joining Helix on the BLUF Domain of the YcgF Photoreceptor from Escherichia coli" [http://www3.interscience.wiley.com/cgi-bin/fulltext/121407023/PDFSTART]

YcgF - YcgE interaction

"The BLUF-EAL protein YcgF acts as a direct anti-repressor in a blue-light response of Escherichia coli" [http://genesdev.cshlp.org/content/23/4/522.full.pdf+html]

Transcription of the RIBOKEY

https://2008.igem.org/Team:KULeuven/Model/Filter

Degradation of the RIBOKEY

https://2008.igem.org/Team:KULeuven/Model/Filter

References

[1] Natalia Tschowri, Susan Busse and Regine Hengge, "The BLUF-EAL protein YcgF acts as a direct anti-repressor in a blue-light response of Escherichia coli"

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 The entire network of interactions is visualized in the diagram below
-[[Image:Biologie_blue_light.png|center]]
 ==Models==

Team:KULeuven/Modelling/Blue Light Receptor

From 2009.igem.org