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无机多聚磷酸盐在大肠杆菌和聚球藻属PCC6803菌株的phoU突变体中的积累。

Accumulation of inorganic polyphosphate in phoU mutants of Escherichia coli and Synechocystis sp. strain PCC6803.

作者信息

Morohoshi Tomohiro, Maruo Tatsuya, Shirai Yoko, Kato Junichi, Ikeda Tsukasa, Takiguchi Noboru, Ohtake Hisao, Kuroda Akio

机构信息

Department of Molecular Biotechnology, Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8530, Japan.

出版信息

Appl Environ Microbiol. 2002 Aug;68(8):4107-10. doi: 10.1128/AEM.68.8.4107-4110.2002.

Abstract

The biological process for phosphate (P(i)) removal is based on the use of bacteria capable of accumulating inorganic polyphosphate (polyP). We obtained Escherichia coli mutants which accumulate a large amount of polyP. The polyP accumulation in these mutants was ascribed to a mutation of the phoU gene that encodes a negative regulator of the P(i) regulon. Insertional inactivation of the phoU gene also elevated the intracellular level of polyP in Synechocystis sp. strain PCC6803. The mutant could remove fourfold more P(i) from the medium than the wild-type strain removed.

摘要

去除磷酸盐(P(i))的生物学过程基于使用能够积累无机多聚磷酸盐(polyP)的细菌。我们获得了能积累大量多聚磷酸盐的大肠杆菌突变体。这些突变体中多聚磷酸盐的积累归因于编码P(i)调节子负调控因子的phoU基因突变。phoU基因的插入失活也提高了集胞藻PCC6803菌株细胞内多聚磷酸盐的水平。该突变体从培养基中去除的P(i)比野生型菌株多四倍。

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