1bvb: Difference between revisions

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[[Image:1bvb.gif|left|200px]]
{{Seed}}
[[Image:1bvb.png|left|200px]]


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{{STRUCTURE_1bvb|  PDB=1bvb  |  SCENE=  }}  
{{STRUCTURE_1bvb|  PDB=1bvb  |  SCENE=  }}  


'''HEME-PACKING MOTIFS REVEALED BY THE CRYSTAL STRUCTURE OF CYTOCHROME C554 FROM NITROSOMONAS EUROPAEA'''
===HEME-PACKING MOTIFS REVEALED BY THE CRYSTAL STRUCTURE OF CYTOCHROME C554 FROM NITROSOMONAS EUROPAEA===




==Overview==
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Cytochrome c554 (cyt c554), a tetra-heme cytochrome from Nitrosomonas europaea, is an essential component in the biological nitrification pathway. In N. europaea, ammonia is converted to hydroxylamine, which is then oxidized to nitrite by hydroxylamine oxidoreductase (HAO). Cyt c554 functions in the latter process by accepting pairs of electrons from HAO and transferring them to a cytochrome acceptor. The crystal structure of cyt c554 at 2.6 A resolution shows a predominantly alpha-helical protein with four covalently attached hemes. The four hemes are arranged in two pairs such that the planes of the porphyrin rings are almost parallel and overlapping at the edge; corresponding heme arrangements are observed in other multi-heme proteins. Striking structural similarities are evident between the tetra-heme core of cyt c554 and hemes 3-6 of HAO, which suggests an evolutionary relationship between these redox partners.
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{{ABSTRACT_PUBMED_9808046}}


==About this Structure==
==About this Structure==
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[[Category: Cytochrome]]
[[Category: Cytochrome]]
[[Category: Electron transport]]
[[Category: Electron transport]]
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Revision as of 16:46, 30 June 2008

File:1bvb.png

Template:STRUCTURE 1bvb

HEME-PACKING MOTIFS REVEALED BY THE CRYSTAL STRUCTURE OF CYTOCHROME C554 FROM NITROSOMONAS EUROPAEA

Template:ABSTRACT PUBMED 9808046

About this Structure

1BVB is a Single protein structure of sequence from Nitrosomonas europaea. Full crystallographic information is available from OCA.

Reference

Heme packing motifs revealed by the crystal structure of the tetra-heme cytochrome c554 from Nitrosomonas europaea., Iverson TM, Arciero DM, Hsu BT, Logan MS, Hooper AB, Rees DC, Nat Struct Biol. 1998 Nov;5(11):1005-12. PMID:9808046

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