The nucleotide sequence of the Pseudomonas aeruginosa pyrE-crc-rph region and the purification of the crc gene product.

ECU Author/Contributor (non-ECU co-authors, if there are any, appear on document)

Shiwani K. Arora (Creator)

Mary Beth Dail (Creator)

Paul W. Hager (Creator)

Carolyn H. MacGregor (Creator)

Paul V. Jr. Phibbs (Creator)

Institution

East Carolina University (ECU )

Web Site: http://www.ecu.edu/lib/

Abstract: The gene (crc) responsible for catabolite repression control in Pseudomonas aeruginosa has been cloned and sequenced. Flanking the crc gene are genes encoding orotate phosphoribosyl transferase (pyrE) and RNase PH (rph). New crc mutants were constructed by disruption of the wild-type crc gene. The crc gene encodes an open reading frame of 259 amino acids with homology to the apurinic/apyrimidinic endonuclease family of DNA repair enzymes. However crc mutants do not have a DNA repair phenotype nor can the crc gene complement Escherichia coli DNA repair-deficient strains. The crc gene product was overexpressed in both P. aeruginosa and in E. coli and the Crc protein was purified from both. The purified Crc proteins show neither apurinic/ apyrimidinic endonuclease nor exonuclease activity. Antibody to the purified Crc protein reacted with proteins of similar size in crude extracts from Pseudomonas putida and Pseudomonas fluorescens suggesting a common mechanism of catabolite repression in these three species. Originally published Journal of Bacteriology Vol. 178 No. 19 Oct 1996

Additional Information

Publication

Other

Journal of Bacteriology. 178:19(October 1996) p. 5627-5635.

Language: English

Date: 2011

Keywords

Pseudomonas aeruginosa, crc gene, catabolite repression

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