myosin


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Related to myosin: Myosin light chain kinase

myosin

 [mi´o-sin]
one of the two main proteins of muscle. Myosin and actin are the proteins involved in contraction of muscle fibers.

my·o·sin

(mī'ō-sin),
A globular protein present in muscle and in nonmuscle cells that has an ATPase activity; in combination with actin, it forms actomyosin; myosin forms the thick filaments in muscle.

myosin

/my·o·sin/ (mi´o-sin) a protein of the myofibril, occurring chiefly in the A band; with actin it forms actomyosin, which is responsible for the contractile properties of muscle.

myosin

(mī′ə-sĭn)
n.
Any of a class of proteins that bind with actin filaments and generate many kinds of cell movement, especially the contraction of myofibrils in muscle cells.

myosin

[mī′əsin]
Etymology: Gk, mys + in, within
a protein that makes up close to one half of the total protein in muscle tissue. The interaction between myosin and another protein, actin, is essential for muscle contraction. See also actino-.

my·o·sin

(mī'ō-sin)
A globulin present in muscle; in combination with actin, it forms actomyosin; myosin forms the thick filaments in muscle.

myosin

a protein found in the thick filaments of the SARCOMERES OF MUSCLE. Myosin combines with ACTIN to produce ACTOMYOSIN during contraction.

myosin

one of the two main myofibrillar proteins in the myofibrils of a muscle fibre. A dimeric molecule comprising two identical monomers. Each monomer consists of a long chain ('light meromyosin, LMM') which readily associates with the chains of other myosin molecules to form the thick filaments, and a more globular component ('heavy meromyosin, HMM'), itself further divisible into two subunits, S2 and S1. The latter are the myosin head-groups, embodying an ATPase and an actin-binding site; it is these that interact with actin in the thin filaments when the muscle is activated, to form the force-generating (actin-myosin) cross-bridges. This whole monomer constitutes one myosin heavy chain (MHC). However, associated with the head-groups are two myosin light chains (MLC), of uncertain function. (Since myosin is not the only constituent of thick filaments, the term 'myosin filament' is a misnomer and better avoided). See also muscle contraction, sliding filament theory.

myosin

muscle globulin; forms actomyosin with actin

myosin,

n one of the two proteins responsible for muscle contraction, the other protein being actin. Contraction occurs when the two protein bundles slide over one another. See also actin.

my·o·sin

(mī'ō-sin)
A globulin present in muscle; in combination with actin, it forms actomyosin.

myosin

(mī´əsin´),
n a cardiac and skeletal muscle protein that makes up close to one half of the proteins that occur in muscle tissue. The interaction of myosin and actin is essential for muscle contraction.

myosin

one of the two main proteins of muscle. Myosin and actin are the proteins involved in contraction of muscle fibers.

myosin ATPase
catalyzes the physicochemical interactions of actin and myosin during muscle contraction.
myosin light chains
each molecule of smooth muscle cell myosin contains two pairs of light molecular weight chains (MLCs), one alkali MLC and one regulatory MLC.
References in periodicals archive ?
Discoveries about the makeup of the trout myosin gene, for instance, provided information Overturf needed to develop the myosin assay.
When Ca-inhibitory myosin was treated with Nethylmaleimide (NEM), the inhibitory effect of [Ca.
Zhang C, Luo JQ, Zheng P, et al Differential expression of lipid metabolism-related genes and myosin heavy chain isoform genes in pig muscle tissue leading to different meat quality.
Shaker-1 mutations reveal roles for myosin VIIA in both development and function of cochlear hair cells.
Single molecule detection of mechanical events and direct determination of mechano-chemical coupling of myosin
Dynamics of myosin, microtubules, and Kinesin-6 at the cortex during cytokinesis in Drosophila S2 cells.
sup][22] performed myosin ATPase staining on gastrocnemius of PAD patients and also found similar muscle fiber remodeling.
Myosin light chain kinase (MLCK) regulates cell migration in a myosin regulatory light chain phosphorylation independent mechanism," The Journal of Biological Chemistry, vol.
In the above-mentioned simulating model, when we slided actin filaments present on both sides of a myosin filament toward center of A band in a single sarcomere as it occurs during contraction, two Z discs on either side of A band moved toward center of the sarcomere, as shown in Figure 1.
They can be functionally distinguished into two types of myofibers -slow (type I) and -fast (type II), that differ in the pattern of expression of the myosin heavy chain isoforms.
No native myosin molecule and myosin heavy chain (MHC) were left and only myosin monomers were present in the meat and these are in agreement with the previous work by Tornberg (2005), which reported a prolonged heating has changed the helix structure of the myosin.
After 24 h, very small percentages of the cells treated with the extract and chromatin-modifying agents reacted with a-actinin and myosin heavy chain (2.