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- W2010417142 abstract "ABSTRACT Arginine metabolism in pseudomonads with multiple catabolic pathways for its utilization as carbon and nitrogen sources is of particular interest as the model system to study control of metabolic integration. We performed transcriptome analyses to identify genes controlled by the arginine regulatory protein ArgR and to better understand arginine metabolic pathways of P . aeruginosa . We compared gene expression in wild-type strain PAO1 with that in argR mutant strain PAO501 grown in glutamate minimal medium in the presence and absence of arginine. Ten putative transcriptional units of 28 genes were inducible by ArgR and arginine, including all known ArgR-regulated operons under aerobic conditions. The newly identified genes include the putative adcAB operon, which encodes a catabolic arginine decarboxylase and an antiporter protein, and PA0328, which encodes a hypothetical fusion protein of a peptidase and a type IV autotransporter. Also identified as members of the arginine network are the following solute transport systems: PA1971 ( braZ ) for branched-chain amino acids permease; PA2042 for a putative sodium:serine symporter; PA3934, which belongs to the family of small oligopeptide transporters; and PA5152-5155, which encodes components of an ABC transporter for a putative opine uptake system. The effect of arginine on the expression of these genes was confirmed by lacZ fusion studies and by DNA binding studies with purified ArgR. Only five transcriptional units of nine genes were qualified as repressible by ArgR and arginine, with three operons ( argF , carAB , and argG ) in arginine biosynthesis and two operons ( gltBD and gdhA ) in glutamate biosynthesis. These results indicate that ArgR is important in control of arginine and glutamate metabolism and that arginine and ArgR may have a redundant effect in inducing the uptake systems of certain compounds." @default.
- W2010417142 created "2016-06-24" @default.
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- W2010417142 date "2004-06-15" @default.
- W2010417142 modified "2023-10-16" @default.
- W2010417142 title "Transcriptome Analysis of the ArgR Regulon in<i>Pseudomonas aeruginosa</i>" @default.
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- W2010417142 doi "https://doi.org/10.1128/jb.186.12.3855-3861.2004" @default.
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