2b2s: Difference between revisions

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[[Image:2b2s.gif|left|200px]]
{{Seed}}
[[Image:2b2s.png|left|200px]]


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{{STRUCTURE_2b2s|  PDB=2b2s  |  SCENE=  }}  
{{STRUCTURE_2b2s|  PDB=2b2s  |  SCENE=  }}  


'''Crystal structure of an oxoferryl species of catalase-peroxidase KATG at pH7.5'''
===Crystal structure of an oxoferryl species of catalase-peroxidase KATG at pH7.5===




==Overview==
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The catalase reaction of catalase-peroxidases involves catalase-specific features built into a peroxidase core. An arginine, 20 A from the active-site heme, acts as a molecular switch moving between two conformations, one that activates heme oxidation and one that activates oxoferryl heme reduction by H(2)O(2), facilitating the catalatic pathway in a peroxidase. The influence of the arginine is imparted to the heme through its association with or dissociation from a tyrosinate that modulates reactivity through a Met-Tyr-Trp crosslinked adduct and a pi electron interaction of the heme with the adduct Trp.
The line below this paragraph, {{ABSTRACT_PUBMED_16211084}}, adds the Publication Abstract to the page
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{{ABSTRACT_PUBMED_16211084}}


==About this Structure==
==About this Structure==
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[[Category: Katg]]
[[Category: Katg]]
[[Category: Oxoferryl species]]
[[Category: Oxoferryl species]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 19:46:39 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 12:04:48 2008''

Revision as of 09:04, 29 July 2008

File:2b2s.png

Template:STRUCTURE 2b2s

Crystal structure of an oxoferryl species of catalase-peroxidase KATG at pH7.5

Template:ABSTRACT PUBMED 16211084

About this Structure

2B2S is a Single protein structure of sequence from Burkholderia pseudomallei. Full crystallographic information is available from OCA.

Reference

A molecular switch and electronic circuit modulate catalase activity in catalase-peroxidases., Carpena X, Wiseman B, Deemagarn T, Singh R, Switala J, Ivancich A, Fita I, Loewen PC, EMBO Rep. 2005 Dec;6(12):1156-62. PMID:16211084

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