2dyr: Difference between revisions

Revision as of 01:38, 4 May 2008

Bovine heart cytochrome C oxidase at the fully oxidized state

OverviewOverview

All 13 lipids, including two cardiolipins, one phosphatidylcholine, three phosphatidylethanolamines, four phosphatidylglycerols and three triglycerides, were identified in a crystalline bovine heart cytochrome c oxidase (CcO) preparation. The chain lengths and unsaturated bond positions of the fatty acid moieties determined by mass spectrometry suggest that each lipid head group identifies its specific binding site within CcOs. The X-ray structure demonstrates that the flexibility of the fatty acid tails facilitates their effective space-filling functions and that the four phospholipids stabilize the CcO dimer. Binding of dicyclohexylcarbodiimide to the O(2) transfer pathway of CcO causes two palmitate tails of phosphatidylglycerols to block the pathway, suggesting that the palmitates control the O(2) transfer process.The phosphatidylglycerol with vaccenate (cis-Delta(11)-octadecenoate) was found in CcOs of bovine and Paracoccus denitrificans, the ancestor of mitochondrion, indicating that the vaccenate is conserved in bovine CcO in spite of the abundance of oleate (cis-Delta(9)-octadecenoate). The X-ray structure indicates that the protein moiety selects cis-vaccenate near the O(2) transfer pathway against trans-vaccenate. These results suggest that vaccenate plays a critical role in the O(2) transfer mechanism.

About this StructureAbout this Structure

2DYR is a Protein complex structure of sequences from Bos taurus. Full crystallographic information is available from OCA.

ReferenceReference

Structures and physiological roles of 13 integral lipids of bovine heart cytochrome c oxidase., Shinzawa-Itoh K, Aoyama H, Muramoto K, Terada H, Kurauchi T, Tadehara Y, Yamasaki A, Sugimura T, Kurono S, Tsujimoto K, Mizushima T, Yamashita E, Tsukihara T, Yoshikawa S, EMBO J. 2007 Mar 21;26(6):1713-25. Epub 2007 Mar 1. PMID:17332748 Page seeded by OCA on Sun May 4 01:38:03 2008

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OCA

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 [[Image:2dyr.jpg|left|200px]]
- {{Structure
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-|ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/Cytochrome-c_oxidase Cytochrome-c oxidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.9.3.1 1.9.3.1] </span>
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-|RELATEDENTRY=[[1v54|1V54]], [[1v55|1V55]], [[2occ|2OCC]], [[1ocr|1OCR]], [[1oco|1OCO]], [[1ocz|1OCZ]], [[1occ|1OCC]], [[2dys|2DYS]]
-|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2dyr FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2dyr OCA], [http://www.ebi.ac.uk/pdbsum/2dyr PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2dyr RCSB]</span>
-}}
 '''Bovine heart cytochrome C oxidase at the fully oxidized state'''
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 [[Category: Yamashita, E.]]
 [[Category: Yoshikawa, S.]]
-[[Category: oxidoreductase]]
+[[Category: Oxidoreductase]]
+''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 01:38:03 2008''
-''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 02:41:24 2008''