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1ehk

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{{STRUCTURE_1ehk| PDB=1ehk | SCENE= }}
{{STRUCTURE_1ehk| PDB=1ehk | SCENE= }}
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'''CRYSTAL STRUCTURE OF THE ABERRANT BA3-CYTOCHROME-C OXIDASE FROM THERMUS THERMOPHILUS'''
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===CRYSTAL STRUCTURE OF THE ABERRANT BA3-CYTOCHROME-C OXIDASE FROM THERMUS THERMOPHILUS===
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==Overview==
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Cytochrome c oxidase is a respiratory enzyme catalysing the energy-conserving reduction of molecular oxygen to water. The crystal structure of the ba(3)-cytochrome c oxidase from Thermus thermophilus has been determined to 2.4 A resolution using multiple anomalous dispersion (MAD) phasing and led to the discovery of a novel subunit IIa. A structure-based sequence alignment of this phylogenetically very distant oxidase with the other structurally known cytochrome oxidases leads to the identification of sequence motifs and residues that seem to be indispensable for the function of the haem copper oxidases, e.g. a new electron transfer pathway leading directly from Cu(A) to Cu(B). Specific features of the ba(3)-oxidase include an extended oxygen input channel, which leads directly to the active site, the presence of only one oxygen atom (O(2-), OH(-) or H(2)O) as bridging ligand at the active site and the mainly hydrophobic character of the interactions that stabilize the electron transfer complex between this oxidase and its substrate cytochrome c. New aspects of the proton pumping mechanism could be identified.
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(as it appears on PubMed at http://www.pubmed.gov), where 10775261 is the PubMed ID number.
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{{ABSTRACT_PUBMED_10775261}}
==About this Structure==
==About this Structure==
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[[Category: Membrane protein]]
[[Category: Membrane protein]]
[[Category: Thermus thermophilus]]
[[Category: Thermus thermophilus]]
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Revision as of 21:42, 30 June 2008

Image:1ehk.png

Template:STRUCTURE 1ehk

CRYSTAL STRUCTURE OF THE ABERRANT BA3-CYTOCHROME-C OXIDASE FROM THERMUS THERMOPHILUS

Template:ABSTRACT PUBMED 10775261

About this Structure

1EHK is a Protein complex structure of sequences from Thermus thermophilus. Full crystallographic information is available from OCA.

Reference

Structure and mechanism of the aberrant ba(3)-cytochrome c oxidase from thermus thermophilus., Soulimane T, Buse G, Bourenkov GP, Bartunik HD, Huber R, Than ME, EMBO J. 2000 Apr 17;19(8):1766-76. PMID:10775261

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