Autoregulation of PurR repressor synthesis and involvement of purR in the regulation of purB, purC, purL, purMN and guaBA expression in Escherichia coli.
Eur. J. Biochem.1990 Jan 26;187(2):373-9. doi:10.1111/j.1432-1033.1990.tb15314.x
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摘要
The purR gene encodes a repressor (PurR) controlling the synthesis of the enzymes of purine biosynthesis. The subunit of PurR was identified as a 38-kDa polypeptide by SDS/polyacrylamide gel electrophoresis. Analysis of a purR-lacZ transcriptional fusion indicated that purR expression is autoregulated. This was confirmed by gel retardation and DNaseI footprinting experiments, where two PurR-binding sites were identified in the transcribed part of purR. Introduction of a purR mutation in wild-type and pur-lac fusion strains was found to abolish purine repression of all genes of the purine biosynthetic pathway except for purA.
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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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