Many organisms regulate gene transcription via sunlight. In plants, phototaxis, flowering and germination all are light dependent processes. Circadian rhythms in many species is entrained by light. Light-activated transcription is achieved through a variety of mechanisms. Some of these mechanisms may be usable as a powerful tool to control gene expression in selected cells with high spatial and temporal resolution. When paired with other optical tools, such as genetically-encoded calcium indicators or channelrhodopsins, this technique would give unprecedented specificity in recording and manipulating brain activity. In this journal club, I review two major systems for photoactivateable transcription and their prospects for application in mammalian systems.
[…] involved in aerobic respiration (and similar in structure to the phytocyanobilins discussed in our Photoactivated Transcription journal club post). Biliverdin is non-fluorescent in solution, but when bound to IFP, it is rigidized and becomes […]
[…] field of photoactivated transcription. Unlike the fully genetically-encoded systems reviewed in a Journal Club, this uses a hybrid genetic and small molecule approach. In Doxycycline-dependent photoactivated […]
[…] protein interactions 16 09 2009 A fully genetically-encoded approach to light-activated transcription is getting closer now that a generalizable method of light-switchable protein interactions has been […]