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.
Entry Term(s)
Actin
F-Actin
G-Actin
Isoactin
N-Actin
alpha-Actin
alpha-Isoactin
beta-Actin
gamma-Actin
Previous Indexing
Muscle Proteins (1966-1970)
Public MeSH Note
82; was ACTIN 1973-81
Online Note
use ACTINS to search ACTIN 1971-81 (as Prov 1971-72)
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.
