1np7

Crystal Structure Analysis of Synechocystis sp. PCC6803 cryptochromeCrystal Structure Analysis of Synechocystis sp. PCC6803 cryptochrome

Structural highlights

1np7 is a 2 chain structure with sequence from Synechocystis sp. PCC 6803. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.9Å
Ligands:	,
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

CRYD_SYNY3 May have a photoreceptor function. Binds DNA; represses transcription of at least 8 genes, including slr0364 and slr1866. Does not encode a DNA photolyase function. Its disruption does not affect circadian rhythm.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Cryptochrome flavoproteins, which share sequence homology with light-dependent DNA repair photolyases, function as photoreceptors in plants and circadian clock components in animals. Here, we coupled sequencing of an Arabidopsis cryptochrome gene with phylogenetic, structural, and functional analyses to identify a new cryptochrome class (cryptochrome DASH) in bacteria and plants, suggesting that cryptochromes evolved before the divergence of eukaryotes and prokaryotes. The cryptochrome crystallographic structure, reported here for Synechocystis cryptochrome DASH, reveals commonalities with photolyases in DNA binding and redox-dependent function, despite distinct active-site and interaction surface features. Whole genome transcriptional profiling together with experimental confirmation of DNA binding indicated that Synechocystis cryptochrome DASH functions as a transcriptional repressor.

Identification of a new cryptochrome class. Structure, function, and evolution.,Brudler R, Hitomi K, Daiyasu H, Toh H, Kucho K, Ishiura M, Kanehisa M, Roberts VA, Todo T, Tainer JA, Getzoff ED Mol Cell. 2003 Jan;11(1):59-67. PMID:12535521^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Brudler R, Hitomi K, Daiyasu H, Toh H, Kucho K, Ishiura M, Kanehisa M, Roberts VA, Todo T, Tainer JA, Getzoff ED. Identification of a new cryptochrome class. Structure, function, and evolution. Mol Cell. 2003 Jan;11(1):59-67. PMID:12535521

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OCA

[1] Brudler R, Hitomi K, Daiyasu H, Toh H, Kucho K, Ishiura M, Kanehisa M, Roberts VA, Todo T, Tainer JA, Getzoff ED. Identification of a new cryptochrome class. Structure, function, and evolution. Mol Cell. 2003 Jan;11(1):59-67. PMID:12535521

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