Curated Optogenetic Publication Database

Search precisely and efficiently by using the advantage of the hand-assigned publication tags that allow you to search for papers involving a specific trait, e.g. a particular optogenetic switch or a host organism.

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Genetically encoded photoswitching of actin assembly through the Cdc42-WASP-Arp2/3 complex pathway.

red PhyB/PIF3 in vitro
Proc Natl Acad Sci USA, 26 Aug 2008 DOI: 10.1073/pnas.0801232105 Link to full text
Abstract: General methods to engineer genetically encoded, reversible, light-mediated control over protein function would be useful in many areas of biomedical research and technology. We describe a system that yields such photo-control over actin assembly. We fused the Rho family GTPase Cdc42 in its GDP-bound form to the photosensory domain of phytochrome B (PhyB) and fused the Cdc42 effector, the Wiskott-Aldrich Syndrome Protein (WASP), to the light-dependent PhyB-binding domain of phytochrome interacting factor 3 (Pif3). Upon red light illumination, the fusion proteins bind each other, activating WASP, and consequently stimulating actin assembly by the WASP target, the Arp2/3 complex. Binding and WASP activation are reversed by far-red illumination. Our approach, in which the biochemical specificity of the nucleotide switch in Cdc42 is overridden by the light-dependent PhyB-Pif3 interaction, should be generally applicable to other GTPase-effector pairs.
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