2pd7
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2.0 Angstrom Crystal Structure of the Fungal Blue-Light Photoreceptor Vivid
OverviewOverview
The Neurospora crassa photoreceptor Vivid tunes blue-light responses and, modulates gating of the circadian clock. Crystal structures of dark-state, and light-state Vivid reveal a light, oxygen, or voltage Per-Arnt-Sim, domain with an unusual N-terminal cap region and a loop insertion that, accommodates the flavin cofactor. Photoinduced formation of a, cystein-flavin adduct drives flavin protonation to induce an N-terminal, conformational change. A cysteine-to-serine substitution remote from the, flavin adenine dinucleotide binding site decouples conformational, switching from the flavin photocycle and prevents Vivid from sending, signals in Neurospora. Key elements of this activation mechanism are, conserved by other photosensors such as White Collar-1, ZEITLUPE, ENVOY, and flavin-binding, kelch repeat, F-BOX 1 (FKF1).
About this StructureAbout this Structure
2PD7 is a Single protein structure of sequence from Neurospora crassa with as ligand. Full crystallographic information is available from OCA.
ReferenceReference
Conformational switching in the fungal light sensor Vivid., Zoltowski BD, Schwerdtfeger C, Widom J, Loros JJ, Bilwes AM, Dunlap JC, Crane BR, Science. 2007 May 18;316(5827):1054-7. PMID:17510367
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