2dyr

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{{STRUCTURE_2dyr| PDB=2dyr | SCENE= }}
{{STRUCTURE_2dyr| PDB=2dyr | SCENE= }}
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'''Bovine heart cytochrome C oxidase at the fully oxidized state'''
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===Bovine heart cytochrome C oxidase at the fully oxidized state===
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==Overview==
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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.
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(as it appears on PubMed at http://www.pubmed.gov), where 17332748 is the PubMed ID number.
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{{ABSTRACT_PUBMED_17332748}}
==About this Structure==
==About this Structure==
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[[Category: Yoshikawa, S.]]
[[Category: Yoshikawa, S.]]
[[Category: Oxidoreductase]]
[[Category: Oxidoreductase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 01:38:03 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 01:08:34 2008''

Revision as of 22:08, 28 July 2008

Image:2dyr.png

Template:STRUCTURE 2dyr

Bovine heart cytochrome C oxidase at the fully oxidized state

Template:ABSTRACT PUBMED 17332748

About this Structure

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

Reference

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 Tue Jul 29 01:08:34 2008

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