Skip to main content
Antimicrobial Agents and Chemotherapy logoLink to Antimicrobial Agents and Chemotherapy
. 1986 Dec;30(6):883–887. doi: 10.1128/aac.30.6.883

Microplate phosphocellulose binding assay for aminoglycoside-modifying enzymes.

R C Cooksey, B G Metchock, C Thornsberry
PMCID: PMC180612  PMID: 3028252

Abstract

We modified the phosphocellulose binding assay for aminoglycoside-modifying enzymes (AMEs) by use of microdilution plates and a multichannel micropipette. Batteries of aminoglycoside substrates for screening organisms for the presence of AMEs as well as for subclassifying enzymes were prepared and stored in microdilution plates. When tested in parallel with the conventional tube reaction assay, the microplate assay yielded comparable radioactive counts and therefore equally correct identifications of AMEs in 32 isolates representing nine bacterial species. Other modifications, such as multichannel dispensing of crude enzyme preparations and radioisotopic precursors, provided a more rapid, convenient, and less expensive means of examining large collections of organisms for AMEs.

Full text

PDF
883

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Cooksey R. C., Clark N. C., Thornsberry C. A gene probe for TEM type beta-lactamases. Antimicrob Agents Chemother. 1985 Jul;28(1):154–156. doi: 10.1128/aac.28.1.154. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Davies J., Brzezinska M., Benveniste R. The problems of drug-resistant pathogenic bacteria. R factors: biochemical mechanisms of resistance to aminoglycoside antibiotics. Ann N Y Acad Sci. 1971 Jun 11;182:226–233. doi: 10.1111/j.1749-6632.1971.tb30659.x. [DOI] [PubMed] [Google Scholar]
  3. Davies J., O'Connor S. Enzymatic modification of aminoglycoside antibiotics: 3-N-acetyltransferase with broad specificity that determines resistance to the novel aminoglycoside apramycin. Antimicrob Agents Chemother. 1978 Jul;14(1):69–72. doi: 10.1128/aac.14.1.69. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Davies J., Smith D. I. Plasmid-determined resistance to antimicrobial agents. Annu Rev Microbiol. 1978;32:469–518. doi: 10.1146/annurev.mi.32.100178.002345. [DOI] [PubMed] [Google Scholar]
  5. Haas M. J., Dowding J. E. Aminoglycoside-modifying enzymes. Methods Enzymol. 1975;43:611–628. doi: 10.1016/0076-6879(75)43124-x. [DOI] [PubMed] [Google Scholar]
  6. O'Callaghan C. H., Morris A., Kirby S. M., Shingler A. H. Novel method for detection of beta-lactamases by using a chromogenic cephalosporin substrate. Antimicrob Agents Chemother. 1972 Apr;1(4):283–288. doi: 10.1128/aac.1.4.283. [DOI] [PMC free article] [PubMed] [Google Scholar]
  7. Pulkkinen L., Huovinen P., Vuorio E., Toivanen P. Characterization of trimethoprim resistance by use of probes specific for transposon Tn7. Antimicrob Agents Chemother. 1984 Jul;26(1):82–86. doi: 10.1128/aac.26.1.82. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Shannon K., Phillips I. Mechanisms of resistance to aminoglycosides in clinical isolates. J Antimicrob Chemother. 1982 Feb;9(2):91–102. doi: 10.1093/jac/9.2.91. [DOI] [PubMed] [Google Scholar]
  9. Young S. A., Tenover F. C., Gootz T. D., Gordon K. P., Plorde J. J. Development of two DNA probes for differentiating the structural genes of subclasses I and II of the aminoglycoside-modifying enzyme 3'-aminoglycoside phosphotransferase. Antimicrob Agents Chemother. 1985 May;27(5):739–744. doi: 10.1128/aac.27.5.739. [DOI] [PMC free article] [PubMed] [Google Scholar]

Articles from Antimicrobial Agents and Chemotherapy are provided here courtesy of American Society for Microbiology (ASM)

RESOURCES