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1rz5

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{{STRUCTURE_1rz5| PDB=1rz5 | SCENE= }}
{{STRUCTURE_1rz5| PDB=1rz5 | SCENE= }}
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'''Di-haem Cytochrome c Peroxidase, Form OUT'''
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===Di-haem Cytochrome c Peroxidase, Form OUT===
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==Overview==
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Cytochrome c peroxidase (CCP) catalyses the reduction of H(2)O(2) to H(2)O, an important step in the cellular detoxification process. The crystal structure of the di-heme CCP from Pseudomonas nautica 617 was obtained in two different conformations in a redox state with the electron transfer heme reduced. Form IN, obtained at pH 4.0, does not contain Ca(2+) and was refined at 2.2 A resolution. This inactive form presents a closed conformation where the peroxidatic heme adopts a six-ligand coordination, hindering the peroxidatic reaction from taking place. Form OUT is Ca(2+) dependent and was crystallized at pH 5.3 and refined at 2.4 A resolution. This active form shows an open conformation, with release of the distal histidine (His71) ligand, providing peroxide access to the active site. This is the first time that the active and inactive states are reported for a di-heme peroxidase.
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{{ABSTRACT_PUBMED_15274917}}
==About this Structure==
==About this Structure==
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[[Category: Oxidoreductase]]
[[Category: Oxidoreductase]]
[[Category: Peroxidase]]
[[Category: Peroxidase]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 08:05:31 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 00:55:25 2008''

Revision as of 21:55, 27 July 2008

Image:1rz5.png

Template:STRUCTURE 1rz5

Di-haem Cytochrome c Peroxidase, Form OUT

Template:ABSTRACT PUBMED 15274917

About this Structure

1RZ5 is a Single protein structure of sequence from Marinobacter hydrocarbonoclasticus. Full crystallographic information is available from OCA.

Reference

Structural basis for the mechanism of Ca(2+) activation of the di-heme cytochrome c peroxidase from Pseudomonas nautica 617., Dias JM, Alves T, Bonifacio C, Pereira AS, Trincao J, Bourgeois D, Moura I, Romao MJ, Structure. 2004 Jun;12(6):961-73. PMID:15274917

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