Analysis of an Escherichia coli mutant strain resistant to the cell-killing function encoded by the gef gene family.
[No authors listed]
摘要
The chromosomal genes gef and relF from Escherichia coli and the plasmid-encoded genes hok, flmA, srnB, and pndA constitute the gef gene family, which encodes a cell-killing function. In order to investigate the mechanism of cell killing we have isolated an E. coli mutant strain that is resistant to the overexpression of the toxic proteins encoded by the gef gene family. This phenotype requires at least two mutations, one of which has been mapped to 55.2 minutes. This mutation was sequenced and shown to represent a single base substitution in an open reading frame (ORF178) encoding a putative membrane protein having a molecular mass of 20.1 kDa. ORF178 and an upstream frame, ORF190, probably constitute an operon.
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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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