Chemicals and Drugs

Chloramphenicol O-Acetyltransferase

An enzyme that catalyzes the acetylation of chloramphenicol to yield chloramphenicol 3-acetate. Since chloramphenicol 3-acetate does not bind to bacterial ribosomes and is not an inhibitor of peptidyltransferase, the enzyme is responsible for the naturally occurring chloramphenicol resistance in bacteria. The enzyme, for which variants are known, is found in both gram-negative and gram-positive bacteria. EC 2.3.1.28.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

An enzyme that catalyzes the acetylation of chloramphenicol to yield chloramphenicol 3-acetate. Since chloramphenicol 3-acetate does not bind to bacterial ribosomes and is not an inhibitor of peptidyltransferase, the enzyme is responsible for the naturally occurring chloramphenicol resistance in bacteria. The enzyme, for which variants are known, is found in both gram-negative and gram-positive bacteria. EC 2.3.1.28.

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Synonyms

8 entry terms
  • CAT Enzyme
  • Chloramphenicol Acetyltransferase
  • Chloramphenicol Transacetylase
  • Acetyltransferase, Chloramphenicol
  • Chloramphenicol O Acetyltransferase
  • Enzyme, CAT
  • O-Acetyltransferase, Chloramphenicol
  • Transacetylase, Chloramphenicol

MeSH Record

Aspects Covered

29 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, analysis, antagonists & inhibitors, biosynthesis, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, deficiency, drug effects, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, ultrastructure, urine.

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History Note

1998(1989)

MeSH Record

Previous Indexing

  • Acetyltransferases (1973-1988)
  • Transferases (1966-1972)

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AMA Style

References

  1. National Library of Medicine. Chloramphenicol O-Acetyltransferase. Medical Subject Headings (MeSH). 2026. Unique ID D015500. http://id.nlm.nih.gov/mesh/2026/D015500
  2. Chloramphenicol O-Acetyltransferase. In: Wikipedia. https://en.wikipedia.org/wiki/Chloramphenicol_acetyltransferase
  3. Chloramphenicol O-Acetyltransferase. In: Wikidata. https://www.wikidata.org/wiki/Q24744759