Chemicals and Drugs

Actins

Filamentous proteins that are the main constituent of the thin filaments of muscle fibers. The filaments (known also as filamentous or F-actin) can be dissociated into their globular subunits; each subunit is composed of a single polypeptide 375 amino acids long. This is known as globular or G-actin. In conjunction with MYOSINS, actin is responsible for the contraction and relaxation of muscle.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

Filamentous proteins that are the main constituent of the thin filaments of muscle fibers. The filaments (known also as filamentous or F-actin) can be dissociated into their globular subunits; each subunit is composed of a single polypeptide 375 amino acids long. This is known as globular or G-actin. In conjunction with MYOSINS, actin is responsible for the contraction and relaxation of muscle.

MeSH Record

Classification

Related Concepts

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MeSH Record

Synonyms

16 entry terms
  • Actin
  • F-Actin
  • G-Actin
  • Isoactin
  • N-Actin
  • alpha-Actin
  • alpha-Isoactin
  • beta-Actin
  • gamma-Actin
  • F Actin
  • G Actin
  • N Actin
  • alpha Actin
  • alpha Isoactin
  • beta Actin
  • gamma Actin

MeSH Record

Aspects Covered

30 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, 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

82; was ACTIN 1971-81 (Prov 1971-72)

MeSH Record

Previous Indexing

  • Muscle Proteins (1966-1970)

MeSH Hierarchy

Tree Numbers

AMA Style

References

  1. National Library of Medicine. Actins. Medical Subject Headings (MeSH). 2026. Unique ID D000199. http://id.nlm.nih.gov/mesh/2026/D000199
  2. Actins. In: Wikipedia. https://en.wikipedia.org/wiki/Actin
  3. Actins. In: Wikidata. https://www.wikidata.org/wiki/Q185269