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大肠杆菌K-12中硫酸盐和硫代硫酸盐的转运:硫酸盐结合蛋白与硫代硫酸盐结合蛋白功能重叠的证据

Sulfate and thiosulfate transport in Escherichia coli K-12: evidence for a functional overlapping of sulfate- and thiosulfate-binding proteins.

作者信息

Sirko A, Zatyka M, Sadowy E, Hulanicka D

机构信息

Institute of Biochemistry and Biophysics, Polish Academy of Sciences, Warsaw.

出版信息

J Bacteriol. 1995 Jul;177(14):4134-6. doi: 10.1128/jb.177.14.4134-4136.1995.

Abstract

In Escherichia coli, sulfate and thiosulfate ions are transported by an ABC-type transporter consisting of both the membrane components (the products of cysT, cysW, and cysA genes) and the periplasmic binders (the products of cysP and sbp genes). The single cysP and sbp mutants are able to utilize both sulfate and thiosulfate as a sole sulfur source, while the inactivation of both genes leads to cysteine auxotrophy resulting from the block in the transport of both ions.

摘要

在大肠杆菌中,硫酸根离子和硫代硫酸根离子由一种ABC型转运体运输,该转运体由膜组分(cysT、cysW和cysA基因的产物)和周质结合蛋白(cysP和sbp基因的产物)组成。单个cysP和sbp突变体能够利用硫酸根和硫代硫酸根作为唯一的硫源,而这两个基因的失活会导致由于两种离子运输受阻而产生半胱氨酸营养缺陷型。

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