1z53: Difference between revisions

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[[Image:1z53.gif|left|200px]]
{{Seed}}
[[Image:1z53.png|left|200px]]


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{{STRUCTURE_1z53|  PDB=1z53  |  SCENE=  }}  
{{STRUCTURE_1z53|  PDB=1z53  |  SCENE=  }}  


'''The 1.13 Angstrom Structure of Iron-free Cytochrome c Peroxidase'''
===The 1.13 Angstrom Structure of Iron-free Cytochrome c Peroxidase===




==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.
The line below this paragraph, {{ABSTRACT_PUBMED_15900441}}, adds the Publication Abstract to the page
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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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