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1z53

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{{STRUCTURE_1z53| PDB=1z53 | SCENE= }}
{{STRUCTURE_1z53| PDB=1z53 | SCENE= }}
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'''The 1.13 Angstrom Structure of Iron-free Cytochrome c Peroxidase'''
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===The 1.13 Angstrom Structure of Iron-free Cytochrome c Peroxidase===
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==Overview==
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The iron-free cytochrome c peroxidase (CCP) crystal structure has been determined to 1.13 A and compared with the 1.2-A ferric-CCP structure. Quite unexpectedly, removal of the iron has no effect on porphyrin geometry and distortion, indicating that protein-porphyrin interactions and not iron coordination or formation of the axial His-Fe bond determines porphyrin conformation. However, there are changes in solvent structure in the distal pocket, which lead to changes in the distal His52 acid-base catalyst. The observed ability of His52 to move in response to small changes in solvent structure is very likely important for its role as a catalyst in assisting in the heterolytic fission of the peroxide O-O bond.
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(as it appears on PubMed at http://www.pubmed.gov), where 15900441 is the PubMed ID number.
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{{ABSTRACT_PUBMED_15900441}}
==About this Structure==
==About this Structure==
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[[Category: Iron-free protoporphyrin ix]]
[[Category: Iron-free protoporphyrin ix]]
[[Category: Trp cation radical]]
[[Category: Trp cation radical]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 17:11:07 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 14:40:17 2008''

Revision as of 11:40, 29 July 2008

Image:1z53.png

Template:STRUCTURE 1z53

The 1.13 Angstrom Structure of Iron-free Cytochrome c Peroxidase

Template:ABSTRACT PUBMED 15900441

About this Structure

1Z53 is a Single protein structure of sequence from Saccharomyces cerevisiae. Full crystallographic information is available from OCA.

Reference

The 1.13-A structure of iron-free cytochrome c peroxidase., Bhaskar B, Poulos TL, J Biol Inorg Chem. 2005 Jun;10(4):425-30. Epub 2005 May 18. PMID:15900441

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