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Related to actin: beta actin


A protein that forms the microfilaments of the eukaryotic cytoskeleton and plays an important role in cell movement, shape, and internal organization. In muscle cells, it functions with myosin to produce contraction.

[Latin āctus, motion; see act + -in.]


(Biochemistry) a protein that participates in many kinds of cell movement, including muscle contraction, during which it interacts with filaments of a second protein, myosin
[C20: from act + -in]


(ˈæk tən)

a protein that functions in muscular contraction by combining with myosin. Compare actomyosin.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.actin - one of the proteins into which actomyosin can be split; can exist in either a globular or a fibrous form
actomyosin - a protein complex in muscle fibers; composed of myosin and actin; shortens when stimulated and causes muscle contractions
simple protein - a protein that yields only amino acids when hydrolyzed
References in periodicals archive ?
1]) aggregation and actin structure, the latter of which was associated with movement of c-Src away from the plasma membrane.
Desmin and muscle actin markers are consistently present in many of the tumor cells, including cells that appear undifferentiated.
pneumoniae isolates, their genotypes, and their phenotypes (their ability to bind to cultured HEp-2 cells and to promote cytoskeleton modifications [fluorescent actin staining test], to invade epithelial cells, to produce various enterotoxins and cytotoxins, and to induce fluid accumulation in the intestines of newborn mice).
In muscle cells, the stability of the polymerized sarcomeric actin (F-actin) is important to interact with myosin to generate force.
Actin filaments are one of the fundamental components of the soft and dynamic skeleton of cells and also play a key role in the reshaping of cell morphologies and cellular motility.
This technique allowed us to monitor the sequence of events that result in ATP hydrolysis by the myosin molecule and the corresponding mechanical interactions between myosin and actin.
Confocal microscopy images of F-actin stained with Phalloidin showed that, in PEG 35 pretreated livers, filamentous actin associated with the membrane microfilamentous network and the pericanalicular band are kept preserved (Figure 5(a)).
Buer Sen of Rubin's lab used cytochalasin D to break up the actin cytoskeleton.
So Bershadsky's colleague Yee Han Tee recorded 100 videos of actin fibers organizing themselves inside human foreskin cells placed under the microscope.
The rpg4-mediated resistance to wheat stem rust (Puccinia graminis) in barley (Hordeum vulgare) requires Rpg5, a second NBS-LRR gene, and an actin depolymerization factor.
ACTIN urged the owners to stop "keeping on" because the dogs were no longer theirs.
4] The sliding filament theory was based on the observation that there are two separate sets of filament actin and myosin located differently with myosin filaments in A band, and on electron microscopy there are two interdigitating sets of filament and length of A band does not change during contraction.