Chemicals and Drugs

DNA Polymerase III

A DNA-dependent DNA polymerase characterized in E. coli and other lower organisms but may be present in higher organisms. Use also for a more complex form of DNA polymerase III designated as DNA polymerase III* or pol III* which is 15 times more active biologically than DNA polymerase I in the synthesis of DNA. This polymerase has both 3'-5' and 5'-3' exonuclease activities, is inhibited by sulfhydryl reagents, and has the same template-primer dependence as pol II.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A DNA-dependent DNA polymerase characterized in E. coli and other lower organisms but may be present in higher organisms. Use also for a more complex form of DNA polymerase III designated as DNA polymerase III* or pol III* which is 15 times more active biologically than DNA polymerase I in the synthesis of DNA. This polymerase has both 3'-5' and 5'-3' exonuclease activities, is inhibited by sulfhydryl reagents, and has the same template-primer dependence as pol II.

MeSH Record

Classification

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MeSH Record

Synonyms

6 entry terms
  • DNA Pol III
  • DNA Polymerase delta
  • DNA-Dependent DNA Polymerase III
  • DNA Dependent DNA Polymerase III
  • Polymerase III, DNA
  • Polymerase delta, DNA

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

91(77); for DNA POLYMERASE DELTA use DNA POLYMERASE III (NM) 1980-97

MeSH Record

Previous Indexing

  • DNA Nucleotidyltransferases (1968-1976)

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References

  1. National Library of Medicine. DNA Polymerase III. Medical Subject Headings (MeSH). 2026. Unique ID D004258. http://id.nlm.nih.gov/mesh/2026/D004258
  2. DNA Polymerase III. In: Wikipedia. https://en.wikipedia.org/wiki/DNA_polymerase_III_holoenzyme
  3. DNA Polymerase III. In: Wikidata. https://www.wikidata.org/wiki/Q21119136