A molecular switch and electronic circuit modulate catalase activity in catalase‐peroxidases
نویسندگان
چکیده
منابع مشابه
A molecular switch and electronic circuit modulate catalase activity in catalase-peroxidases.
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...
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15 صفحه اولElectronic state of the molecular oxygen released by catalase.
In catalases, the high redox intermediate known as compound I (Cpd I) is reduced back to the resting state by means of hydrogen peroxide in a 2-electron reaction [Cpd I (Por(*+)-Fe(IV)O) + H(2)O(2) --> Enz (Por-Fe(III)) + H(2)O + O(2)]. It has been proposed that this reaction takes place via proton transfer toward the distal His and hydride transfer toward the oxoferryl oxygen (H(+)/H(-) scheme...
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ژورنال
عنوان ژورنال: EMBO reports
سال: 2005
ISSN: 1469-221X,1469-3178
DOI: 10.1038/sj.embor.7400550