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1. An elementary reaction step of the proton pump is revealed by mutation of tryptophan-164 to phenylalanine in cytochrome c oxidase from paracoccus denitrificans

Author

Ribacka, Camilla, Verkhovsky, Michael I., Belevich, Ilya, Bloch, Dmitry A., Puustinen, Anne, and Wikstrom, Martem

Subjects
Cytochrome c -- Chemical properties, Tryptophan -- Chemical properties, Microbiological chemistry -- Research, Biological sciences, Chemistry
Abstract

The redox-active centers of cytochrome c oxidase from P. denitrificans together with key amino acids, W164, E278, R473 and R474 are discussed. The DELTA-propionate of heme a(sub 3) is stabilized by hydrogen bonds from W164 and R473 and by charge interactions with R473 and R474.

Published
2005

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