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. 1982;1(11):1411–1416. doi: 10.1002/j.1460-2075.1982.tb01331.x

Identification of a novel ampC beta-lactamase promoter in a clinical isolate of Escherichia coli.

O Olsson, S Bergström, S Normark
PMCID: PMC553225  PMID: 6765197

Abstract

A clinical strain of Escherichia coli, C16, that overproduces the ampC beta-lactamase was isolated. A 203-bp DNA segment from this strain, including the promoter and attenuator region of the ampC structural gene, was sequenced. A comparison with the corresponding sequence of E. coli K12 revealed four base pair differences between the ampC segments from these strains. DNA sequence data and in vitro transcription indicated that the ampC promoter in the clinical isolate was displaced 5 bp upstream of the promotor defined in the E. coli K12 strain. Like the ampC gene of E. coli K12, the ampC gene from the clinical isolate was metabolically regulated. However, the increase in the specific amount of beta-lactamase relative to the increase in specific growth rate was much higher in the clinical isolate. These data imply that the growth rate-dependent anti-termination acting on the ampC attenuator in vivo is more pronounced in the clinical E. coli isolate than in E. coli K12. A possible molecular mechanism for this is discussed.

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Selected References

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  1. Akusjärvi G., Pettersson U. Sequence analysis of adenovirus DNA. I. Nucleotide sequence at the carboxy-terminal end of the gene for adenovirus type 2 hexon. Virology. 1978 Dec;91(2):477–480. doi: 10.1016/0042-6822(78)90394-x. [DOI] [PubMed] [Google Scholar]
  2. Benton W. D., Davis R. W. Screening lambdagt recombinant clones by hybridization to single plaques in situ. Science. 1977 Apr 8;196(4286):180–182. doi: 10.1126/science.322279. [DOI] [PubMed] [Google Scholar]
  3. Bergström S., Normark S. Beta-lactam resistance in clinical isolates of Escherichia coli caused by elevated production of the ampC-mediated chromosomal beta-lactamase. Antimicrob Agents Chemother. 1979 Oct;16(4):427–433. doi: 10.1128/aac.16.4.427. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Bergström S., Olsson O., Normark S. Common evolutionary origin of chromosomal beta-lactamase genes in enterobacteria. J Bacteriol. 1982 May;150(2):528–534. doi: 10.1128/jb.150.2.528-534.1982. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Edlund T., Grundström T., Björk G. R., Normark S. Tandem duplication induced by an unusual ampA1-, ampC-transducing lambda phage: a probe to initiate gene amplification. Mol Gen Genet. 1980;180(2):249–257. doi: 10.1007/BF00425836. [DOI] [PubMed] [Google Scholar]
  6. Edlund T., Grundström T., Normark S. Isolation and characterization of DNA repetitions carrying the chromosomal beta-lactamase gene of Escherichia coli K-12. Mol Gen Genet. 1979 Jun 7;173(2):115–125. doi: 10.1007/BF00330301. [DOI] [PubMed] [Google Scholar]
  7. Gold L., Pribnow D., Schneider T., Shinedling S., Singer B. S., Stormo G. Translational initiation in prokaryotes. Annu Rev Microbiol. 1981;35:365–403. doi: 10.1146/annurev.mi.35.100181.002053. [DOI] [PubMed] [Google Scholar]
  8. Grundström T., Jaurin B., Edlund T., Normark S. Physical mapping and expression of hybrid plasmids carrying chromosomal beta-lactamase genes of Escherichia coli K-12. J Bacteriol. 1980 Sep;143(3):1127–1134. doi: 10.1128/jb.143.3.1127-1134.1980. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Grundström T., Jaurin B. Overlap between ampC and frd operons on the Escherichia coli chromosome. Proc Natl Acad Sci U S A. 1982 Feb;79(4):1111–1115. doi: 10.1073/pnas.79.4.1111. [DOI] [PMC free article] [PubMed] [Google Scholar]
  10. Jaurin B., Grundström T., Edlund T., Normark S. The E. coli beta-lactamase attenuator mediates growth rate-dependent regulation. Nature. 1981 Mar 19;290(5803):221–225. doi: 10.1038/290221a0. [DOI] [PubMed] [Google Scholar]
  11. Jaurin B., Grundström T. ampC cephalosporinase of Escherichia coli K-12 has a different evolutionary origin from that of beta-lactamases of the penicillinase type. Proc Natl Acad Sci U S A. 1981 Aug;78(8):4897–4901. doi: 10.1073/pnas.78.8.4897. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Jaurin B., Normark S. In vivo regulation of chromosomal beta-lactamase in Escherichia coli. J Bacteriol. 1979 Jun;138(3):896–902. doi: 10.1128/jb.138.3.896-902.1979. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. LOWRY O. H., ROSEBROUGH N. J., FARR A. L., RANDALL R. J. Protein measurement with the Folin phenol reagent. J Biol Chem. 1951 Nov;193(1):265–275. [PubMed] [Google Scholar]
  14. Laurell C. B. Quantitative estimation of proteins by electrophoresis in agarose gel containing antibodies. Anal Biochem. 1966 Apr;15(1):45–52. doi: 10.1016/0003-2697(66)90246-6. [DOI] [PubMed] [Google Scholar]
  15. Maizels N. M. The nucleotide sequence of the lactose messenger ribonucleic acid transcribed from the UV5 promoter mutant of Escherichia coli. Proc Natl Acad Sci U S A. 1973 Dec;70(12):3585–3589. doi: 10.1073/pnas.70.12.3585. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Messing J., Crea R., Seeburg P. H. A system for shotgun DNA sequencing. Nucleic Acids Res. 1981 Jan 24;9(2):309–321. doi: 10.1093/nar/9.2.309. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. Minkley E. G., Pribnow D. Transcription of the early region of bacteriophage T7: selective initiation with dinucleotides. J Mol Biol. 1973 Jun 25;77(2):255–277. doi: 10.1016/0022-2836(73)90335-5. [DOI] [PubMed] [Google Scholar]
  18. Normark S., Edlund T., Grundström T., Bergström S., Wolf-Watz H. Escherichia coli K-12 mutants hyperproducing chromosomal beta-lactamase by gene repetitions. J Bacteriol. 1977 Dec;132(3):912–922. doi: 10.1128/jb.132.3.912-922.1977. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. Sanger F., Nicklen S., Coulson A. R. DNA sequencing with chain-terminating inhibitors. Proc Natl Acad Sci U S A. 1977 Dec;74(12):5463–5467. doi: 10.1073/pnas.74.12.5463. [DOI] [PMC free article] [PubMed] [Google Scholar]
  20. Scherer G. F., Walkinshaw M. D., Arnott S., Morré D. J. The ribosome binding sites recognized by E. coli ribosomes have regions with signal character in both the leader and protein coding segments. Nucleic Acids Res. 1980 Sep 11;8(17):3895–3907. doi: 10.1093/nar/8.17.3895. [DOI] [PMC free article] [PubMed] [Google Scholar]

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