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Identification of enzymes and regulatory proteins in Escherichia coli that are oxidized under nitrogen, carbon, or phosphate starvation.

ABSTRACT: Using proteomic technologies, we identified 62 proteins that are oxidized to carbonyl derivatives during growth of Escherichia coli under nitrogen starvation (NS), carbon starvation (CS), and phosphate starvation (PS) conditions. The carbonylated proteins were converted to 2,4-dinitrophenylhydrazone derivatives and these were identified using Western blotting and mass spectrometry by searching E. coli proteins in the Swiss-Prot and/or NCBI databases. Fourteen of the oxidized proteins were formed under both NS and CS conditions, and only three proteins were specifically oxidized under PS conditions. Interestingly, the carbonyl content of proteins in crude extracts of cells harvested after 48 h of stationary growth under NS and CS was significantly lower than that observed at mid-log and end-log phases of growth. In contrast, the carbonyl content of proteins in extracts of cells grown under PS conditions was fairly constant during comparable periods of growth.

SUBMITTER: Noda Y

PROVIDER: S-EPMC2141798 | biostudies-literature | 2007 Nov

REPOSITORIES: biostudies-literature

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Identification of enzymes and regulatory proteins in Escherichia coli that are oxidized under nitrogen, carbon, or phosphate starvation.

Noda Yasuko Y Berlett Barbara S BS Stadtman Earl R ER Aponte Angel A Morgan Meghan M Shen Rong-Fong RF

Proceedings of the National Academy of Sciences of the United States of America 20071114 47

Using proteomic technologies, we identified 62 proteins that are oxidized to carbonyl derivatives during growth of Escherichia coli under nitrogen starvation (NS), carbon starvation (CS), and phosphate starvation (PS) conditions. The carbonylated proteins were converted to 2,4-dinitrophenylhydrazone derivatives and these were identified using Western blotting and mass spectrometry by searching E. coli proteins in the Swiss-Prot and/or NCBI databases. Fourteen of the oxidized proteins were formed ...[more]

PMID: 18003895

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Dataset Information

Identification of enzymes and regulatory proteins in Escherichia coli that are oxidized under nitrogen, carbon, or phosphate starvation.

Publications

Identification of enzymes and regulatory proteins in Escherichia coli that are oxidized under nitrogen, carbon, or phosphate starvation.

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