The essential Escherichia coli msbA gene, a multicopy suppressor of null mutations in the htrB gene, is related to the universally conserved family of ATP-dependent translocators.
[No authors listed]
摘要
We report the characterization of the msbA gene, isolated as a multicopy suppressor of the HtrB temperature-sensitive phenotype. The msbA gene maps to 20.5 min on the Escherichia coli genetic map and encodes a protein with an estimated molecular mass of 64,460 Da, with the properties of an integral membrane protein. The amino acid sequence of MsbA is very similar to those of the family of ATP-dependent translocators, which includes the haemolysin B protein of E. coli and the mammalian multidrug resistance (MDR) proteins. Mutational analysis of msbA indicates that it may form an operon with a downstream gene, orfE, and that both of these genes are essential for bacterial viability under all growth conditions tested.
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基因功能
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原始数据
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文献解读
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