A PATHWAY FOR DISULFIDE BOND FORMATION INVIVO

A PATHWAY FOR DISULFIDE BOND FORMATION INVIVO
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DOI:
10.1073/pnas.90.3.1038
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发表时间:
1993-02-01
影响因子:
11.1
通讯作者:
BECKWITH, J
BECKWITH, J
中科院分区:
综合性期刊1区
文献类型:
--
作者:
BARDWELL, JCA;LEE, JO;BECKWITH, J

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大肠杆菌中蛋白质二硫键的形成需要质周蛋白DsbA。我们在这里描述了第二种蛋白质DsbB基因的突变,这也是二硫键形成所必需的。有证据表明,DsbB可能通过再氧化DsbA来起作用,从而再生其向靶蛋白提供二硫键的能力。我们认为DsbB是一种完整的膜蛋白,可能参与了细胞质膜上氧化还原电位的传导。
Protein disulfide bond formation in Escherichia coli requires the periplasmic protein DsbA. We describe here mutations in the gene for a second protein, DsbB, which is also necessary for disulfide bond formation. Evidence suggests that DsbB may act by reoxidizing DsbA, thereby regenerating its ability to donate its disulfide bond to target proteins. We propose that DsbB, an integral membrane protein, may be involved in transducing redox potential across the cytoplasmic membrane.