Matches in SemOpenAlex for { <https://semopenalex.org/work/W2259355564> ?p ?o ?g. }
- W2259355564 abstract "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." @default.
- W2259355564 created "2016-06-24" @default.
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- W2259355564 date "2014-04-08" @default.
- W2259355564 modified "2023-09-26" @default.
- W2259355564 title "Dual Sensors and Dual Response Regulators Interact to Control Nitrate- and Nitrite-Responsive Gene Expression in Escherichia coli" @default.
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- W2259355564 doi "https://doi.org/10.1128/9781555818319.ch14" @default.
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