Chemicals and Drugs

Ketol-Acid Reductoisomerase

An enzyme that catalyzes the oxidation of (R)-2,3-dihydroxy-3-methylbutanoate to (S)-2-hydroxy-2-methyl-3-oxobutanoate in the presence of NADP. It is involved in the biosynthesis of VALINE; LEUCINE; ISOLEUCINE; pentothenate and COENZYME A. This enzyme was formerly classified as EC 1.1.1.89.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

An enzyme that catalyzes the oxidation of (R)-2,3-dihydroxy-3-methylbutanoate to (S)-2-hydroxy-2-methyl-3-oxobutanoate in the presence of NADP. It is involved in the biosynthesis of VALINE; LEUCINE; ISOLEUCINE; pentothenate and COENZYME A. This enzyme was formerly classified as EC 1.1.1.89.

MeSH Record

Classification

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MeSH Record

Synonyms

12 entry terms
  • Acetohydroxy Acid Isomeroreductase
  • Alpha-Acetohydroxyacid Isomeroreductase
  • Dihydroxyisovalerate Dehydrogenase (Isomerizing)
  • Hydroxyacid Reductoisomerase
  • Isomeroreductase
  • Acid Isomeroreductase, Acetohydroxy
  • Alpha Acetohydroxyacid Isomeroreductase
  • Isomeroreductase, Acetohydroxy Acid
  • Isomeroreductase, Alpha-Acetohydroxyacid
  • Ketol Acid Reductoisomerase
  • Reductoisomerase, Hydroxyacid
  • Reductoisomerase, Ketol-Acid

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.

MeSH Record

History Note

2006(1980); use VALERATES 1970-1979

MeSH Hierarchy

Tree Number

AMA Style

References

  1. National Library of Medicine. Ketol-Acid Reductoisomerase. Medical Subject Headings (MeSH). 2026. Unique ID D050540. http://id.nlm.nih.gov/mesh/2026/D050540
  2. Ketol-Acid Reductoisomerase. In: Wikipedia. https://en.wikipedia.org/wiki/Ketol-acid_reductoisomerase
  3. Ketol-Acid Reductoisomerase. In: Wikidata. https://www.wikidata.org/wiki/Q428209