| Literature DB >> 19246375 |
James P Collman1, Richard A Decréau, Abhishek Dey, Ying Yang.
Abstract
Three distal imidazole pickets in a cytochrome c oxidase (CcO) model form a pocket hosting a cluster of water molecules. The cluster makes the ferrous heme low spin, and consequently the O(2) binding slow. The nature of the rigid proximal imidazole tail favors a high spin/low spin cross-over. The O(2) binding rate is enhanced either by removing the water, increasing the hydrophobicity of the gas binding pocket, or inserting a metal ion that coordinates to the 3 distal imidazole pickets.Entities:
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Year: 2009 PMID: 19246375 PMCID: PMC2657390 DOI: 10.1073/pnas.0900893106
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN: 0027-8424 Impact factor: 11.205