6t73

New antiparallel dimer of aureochrome 1a LOV domain mutants from Phaeodactylum tricornutum

spinqualitylabelsall models 6t73, resolution 3.44Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6t73 is a 3 chain structure with sequence from Diatom. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CL, FMN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Control of cellular events by optogenetic tools is a powerful approach to manipulate cellular functions in a minimally invasive manner. A common problem posed by the application of optogenetic tools is to tune the activity range to be physiologically relevant. Here, we characterized a photoreceptor of the light-oxygen-voltage domain family of Phaeodactylum tricornutum aureochrome 1a (AuLOV) as a tool for increasing protein stability under blue light conditions in budding yeast. Structural studies of AuLOV(wt), the variants AuLOV(M254) and AuLOV(W349) revealed alternative dimer association modes for the dark state, which differ from previously reported AuLOV dark state structures. Rational design of AuLOV-dimer interface mutations resulted in an optimized optogenetic tool that we fused to the photoactivatable adenylyl cyclase from Beggiatoa sp.. This synergistic light-regulation approach using two photoreceptors resulted in an optimized, photoactivatable adenylyl cyclase with a cyclic AMP production activity that matches the physiological range of Saccharomyces cerevisiae. Overall, we enlarged the optogenetic toolbox for yeast and demonstrated the importance of fine-tuning the optogenetic tool activity for successful application in cells. An optogenetic tool for induced protein stabilization based on the Phaeodactylum tricornutum aureochrome 1a LOV domain.,Hepp S, Trauth J, Hasenjager S, Bezold F, Essen LO, Taxis C J Mol Biol. 2020 Feb 24. pii: S0022-2836(20)30192-3. doi:, 10.1016/j.jmb.2020.02.019. PMID:32105734 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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