1fft

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[[Image:1fft.gif|left|200px]]
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{{Seed}}
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{{STRUCTURE_1fft| PDB=1fft | SCENE= }}
{{STRUCTURE_1fft| PDB=1fft | SCENE= }}
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'''The structure of ubiquinol oxidase from Escherichia coli'''
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===The structure of ubiquinol oxidase from Escherichia coli===
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==Overview==
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Cell respiration is catalyzed by the heme-copper oxidase superfamily of enzymes, which comprises cytochrome c and ubiquinol oxidases. These membrane proteins utilize different electron donors through dissimilar access mechanisms. We report here the first structure of a ubiquinol oxidase, cytochrome bo3, from Escherichia coli. The overall structure of the enzyme is similar to those of cytochrome c oxidases; however, the membrane-spanning region of subunit I contains a cluster of polar residues exposed to the interior of the lipid bilayer that is not present in the cytochrome c oxidase. Mutagenesis studies on these residues strongly suggest that this region forms a quinone binding site. A sequence comparison of this region with known quinone binding sites in other membrane proteins shows remarkable similarities. In light of these findings we suggest specific roles for these polar residues in electron and proton transfer in ubiquinol oxidase.
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(as it appears on PubMed at http://www.pubmed.gov), where 11017202 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11017202}}
==About this Structure==
==About this Structure==
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[[Category: Electron transport]]
[[Category: Electron transport]]
[[Category: Membrane protein]]
[[Category: Membrane protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 16:16:27 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 03:10:56 2008''

Revision as of 00:10, 1 July 2008

Image:1fft.png

Template:STRUCTURE 1fft

The structure of ubiquinol oxidase from Escherichia coli

Template:ABSTRACT PUBMED 11017202

About this Structure

1FFT is a Protein complex structure of sequences from Escherichia coli. Full crystallographic information is available from OCA.

Reference

The structure of the ubiquinol oxidase from Escherichia coli and its ubiquinone binding site., Abramson J, Riistama S, Larsson G, Jasaitis A, Svensson-Ek M, Laakkonen L, Puustinen A, Iwata S, Wikstrom M, Nat Struct Biol. 2000 Oct;7(10):910-7. PMID:11017202

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