兼性甲基营养菌假单胞菌AM1的甲醇脱氢酶与自身可还原细胞色素c之间的相互作用
The interaction between methanol dehydrogenase and the autoreducible cytochromes c of the facultative methylotroph Pseudomonas AM1.
作者信息
O'Keeffe D T, Anthony C
出版信息
Biochem J. 1980 Aug 15;190(2):481-4. doi: 10.1042/bj1900481.
Abstract
Cytochromes cH and cL were autoreduced at high pH (pK greater than 10) and the autoreduced cytochromes reacted with CO. The autoreduction was first-order with respect to oxidized cytochrome c and was reversible by lowering the pH. Pure methanol dehydrogenase reduced cytochrome c (in the absence of methanol) by lowering the pK for autoreduction to less than 8.5. A mechanism is proposed for the autoreduction of cytochrome c and its involvement in the reaction with methanol dehydrogenase.
摘要
细胞色素cH和cL在高pH值（pK大于10）时会自动还原，且自动还原的细胞色素会与CO反应。自动还原对氧化型细胞色素c呈一级反应，通过降低pH值可使其逆转。纯甲醇脱氢酶通过将自动还原的pK降低至小于8.5，从而在（无甲醇的情况下）还原细胞色素c。本文提出了一种细胞色素c自动还原的机制及其在与甲醇脱氢酶反应中的作用。
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