Probing a Role of Subunit IV of the Escherichia coli bo-type Ubiquinol Oxidase by Deletion and Cross-linking Analyses*
Probing a Role of Subunit IV of the Escherichia coli bo-type Ubiquinol Oxidase by Deletion and Cross-linking Analyses*
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通过删除和交联分析探讨大肠杆菌 bo 型泛醇氧化酶亚基 IV 的作用*
DOI:
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发表时间:
1996
影响因子:
4.8
通讯作者:
Y. Anraku
中科院分区:
文献类型:
--
作者:
K. Saiki;H. Nakamura;T. Mogi;Y. Anraku
Subunit IV of the Escherichia coli bo-type ubiquinol oxidase is a 12-kDa membrane protein encoded by the cyoD gene and is conserved in the bacterial heme-copper terminal oxidases. To probe the functional role of subunit IV, we carried out deletion analysis and chemical cross-linking experiments with a homobifunctional and cleavable reagent. Spectroscopic properties of the mutant oxidases suggest that the C-terminal two-third (Val45 to His109) containing helices II and III is essential for the functional expression of the oxidase complex and for the CuB binding to the heme-copper binuclear center in subunit I. Cross-linking studies indicate that subunit IV is in close vicinity to subunit III. Based on these observations, we propose that subunit IV is present in a cleft formed by subunits I and III and assists the CuB binding to subunit I during biosynthesis or assembly of the oxidase complex.
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DOI:
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发表时间:
1990
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Salerno,JC;Bolgiano,B;Poole,RK;Gennis,RB;Ingledew,WJ
通讯作者:
Ingledew,WJ
影响因子:
2.9
作者:
Minghetti,KC;Goswitz,VC;Gabriel,NE;Hill,JJ;Barassi,CA;Georgiou,CD;Chan,SI;Gennis,RB
通讯作者:
Gennis,RB
DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Welter,R;Gu,LQ;Yu,L;Yu,CA;Rumbley,J;Gennis,RB
通讯作者:
Gennis,RB
DOI:
10.1016/s0005-2728(05)80260-9
发表时间:
1991
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
Gennis,RB
通讯作者:
Gennis,RB