Reductive activation of nitrate reductases

Sarah J.Field; Nicholas P.Thornton; Lee J.Anderson; Andrew J.Gates; Ann Reilly

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Reductive activation of nitrate reductases

机译：硝酸盐还原酶的还原活化

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Protein film voltammetry of Paracoccus pantotrophus respiratory nitrate reductase (NarGH) and Synechococcus elongatus assimilatory nitrate reductase (NarB) shows that reductive activation of these enzymes may be required before steady state catalysis is observed.For NarGH complementary spectroscopic studies suggest a structural context for the activation.Catalytic protein film voltammetry at a range of temperatures has allowed quantitation of the activation energies for nitrate reduction.For NarGH with an operating potential of ca.0.05 V the activation energy of ca.35 kJ mol~(-1) is over twice that measured for NarB whose operating potential is ca.-0.35 V.

机译：泛副球菌呼吸硝酸还原酶（NarGH）和细长突触球菌同化硝酸还原酶（NarB）的蛋白膜伏安法表明，在观察到稳态催化之前可能需要对这些酶进行还原活化。在一定温度范围内通过催化蛋白膜伏安法可以定量还原硝酸盐的活化能。对于工作电位约为0.05 V的NarGH，活化能约为35 kJ mol〜（-1）的两倍以上。对于其工作电势约为-0.35 V的NarB进行测量。

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《Dalton transactions: An international journal of inorganic chemistry》 |2005年第21期|共7页
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Sarah J.Field; Nicholas P.Thornton; Lee J.Anderson; Andrew J.Gates; Ann Reilly;
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Reductive activation of nitrate reductases

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