Dual Sensors and Dual Response Regulators Interact to Control Nitrate- and Nitrite-Responsive Gene Expression in Escherichia coli
Dual Sensors and Dual Response Regulators Interact to Control Nitrate- and Nitrite-Responsive Gene Expression in Escherichia coli
复制标题
双传感器和双响应调节器相互作用来控制大肠杆菌中的硝酸盐和亚硝酸盐响应基因表达
DOI:
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发表时间:
1995
期刊:
影响因子:
--
通讯作者:
R. S. Rabin
中科院分区:
文献类型:
--
作者:
V. Stewart;R. S. Rabin
Nitrate and nitrite control is mediated by the Nar (nitrate reductase) dual interacting two-component regulatory systems, which consist of homologous membrane-bound sensors (the NarX and NarQ proteins) and homologous DNA binding response regulators (the NarL and NarP proteins). This chapter emphasizes that the Nar system controls nitrate and nitrite metabolism strictly in response to the needs of anaerobic respiration and has nothing to do with the use of nitrate or nitrite as nitrogen sources for biosynthesis. Identification of dual nitrate-responsive sensors led to the notion that dual response regulators may also be involved in the Nar regulatory circuit. Analysis of target operon expression in narL and narP null mutants has revealed a diversity of regulatory patterns. The narQ and narP genes have only recently been recognized, whereas the narX and narL genes have been studied for many years. Sequence comparisons strongly suggest that the NarX/NarQ and NarL/NarP proteins function in phosphoryl transfer reactions. Studies with purified proteins have examined some of the interactions in vitro. The Asp-59 residue in the NarL protein corresponds to the site of phosphorylation in all response regulators studied. A specific equilibrium state produces a regulatory outcome based on the net effect of the positive and negative sensor activities, which, in turn, controls the phosphorylation state of the NarL response regulator. The control regions of several nitrate- and nitrite-regulated operons have now been studied in detail. Most studies have used batch cultures grown with excess nitrate or nitrite.
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DOI:
10.1073/pnas.84.11.3901
发表时间:
1987
影响因子:
11.1
作者:
Iuchi,S;Lin,EC
通讯作者:
Lin,EC
DOI:
10.1073/pnas.89.18.8701
发表时间:
1992
影响因子:
11.1
作者:
Rabin,RS;Collins,LA;Stewart,V
通讯作者:
Stewart,V
DOI:
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发表时间:
1988
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Li,SF;DeMoss,JA
通讯作者:
DeMoss,JA
DOI:
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发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Dong,XR;Li,SF;DeMoss,JA
通讯作者:
DeMoss,JA
DOI:
--
发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Schröder,I;Darie,S;Gunsalus,RP
通讯作者:
Gunsalus,RP