A cytochrome b/c1 complex with ubiquinol--cytochrome c2 oxidoreductase activity from Rhodopseudomonas sphaeroides GA.

A cytochrome b/c1 complex with ubiquinol--cytochrome c2 oxidoreductase activity from Rhodopseudomonas sphaeroides GA.
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来自球形红假单胞菌 GA 的具有泛醇 - 细胞色素 c2 氧化还原酶活性的细胞色素 b/c1 复合物。

DOI:
10.1111/j.1432-1033.1982.tb06753.x
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发表时间:
1982
期刊:
European journal of biochemistry
影响因子:
--
通讯作者:
G. Hauska
G. Hauska
中科院分区:
--
文献类型:
--
作者:
N. Gabellini;J. Bowyer;E. Hurt;B. Melandri;G. Hauska

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从球形红假单胞菌GA中分离到一个催化泛醇还原细胞色素c的细胞色素b/c1复合物。每个细胞色素c1含有两个血红素b和亚化学计量量的泛素-10和Rieske Fe-S中心,基本上不含反应中心和细菌叶绿素。该复合物由三种主要的多肽组成,表观分子质量分别为40、34和25 kDa。34 kda多肽携带血红素。细胞色素c1的中点电位为285 mV。细胞色素b的两个中点电位,在50和-60毫伏,在pH 7.4,可以得到,如果假设两个成分的量相等。泛醇-细胞色素c氧化还原酶活性是泛醇和细菌细胞色素c特异性的,抗霉素A和5-n-十一烷基-6-羟基-4,7-二氧苯并噻唑可抑制泛醇-细胞色素c氧化还原酶活性。该复合物显示氧化诱导的细胞色素b的还原。
A cytochrome b/c1 complex which catalyses the reduction of cytochrome c by ubiquinol has been isolated from Rhodopseudomonas sphaeroides GA. It contains two hemes b and substoichiometric amounts of ubiquinone-10 and of the Rieske Fe-S center per cytochrome c1, and is essentially free of reaction center and bacteriochlorophyll. The complex consists of three major polypeptides with apparent molecular masses of 40, 34 and 25 kDa. The 34-kDa polypeptide carries heme. Cytochrome c1 has a midpoint potential of 285 mV. For cytochrome b two midpoint potentials, at 50 and -60 mV, at pH 7.4, can be derived if one assumes two components of equal amount. Ubiquinol--cytochrome c oxidoreductase activity is specific for ubiquinol and bacterial cytochromes c, and is inhibited by antimycin A and 5-n-undecyl-6-hydroxy-4,7-dioxobenzothiazole. The complex shows oxidant-induced reduction of cytochrome b.
利用细菌反应中心和线粒体的泛醌-细胞色素 b-c1/c 片段构建闪光激活的循环电子传递系统。
DOI: 10.1073/pnas.77.11.6339
发表时间: 1980
影响因子: 11.1
作者:
Packham,NK;Tiede,DM;Mueller,P;Dutton,PL
通讯作者: Dutton,PL
细胞色素 b-c1 片段的铁硫蛋白在线粒体呼吸链的电子转移和能量守恒反应中的功能。
DOI: 10.1016/0304-4173(81)90008-2
发表时间: 1981
期刊: Biochimica et biophysica acta
影响因子: --
作者:
Trumpower,BL
通讯作者: Trumpower,BL