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Key Documents

M0531

Sigma-Aldrich

Myosin, Calcium activated from porcine heart

buffered aqueous glycerol solution, 0.1-0.5 units/mg protein (biuret)

Sinónimos:

Calcium-Activated Myosin, Myosin from Porcine Heart, Porcine Heart Myosin

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About This Item

MDL number:
UNSPSC Code:
12352202
NACRES:
NA.32

biological source

Porcine heart

Quality Level

form

buffered aqueous glycerol solution

specific activity

0.1-0.5 units/mg protein (biuret)

mol wt

heavy chain ~200 kDa (each)
light chain 15-20 kDa (each)
~480 kDa

concentration

≥1.0 mg protein/mL Biuret

color

hazy colorless to light yellow

UniProt accession no.

shipped in

wet ice

storage temp.

−20°C

Gene Information

General description

Myosin is one of three classes of cytoskeletal motor proteins that have been identified. The others are kinesins and dyneins. Myosin family members contain globular head domain with actin and ATP binding site, α-helical neck region and a coiled–coiled tail domain. Nonmuscle myosins are highly expressed in brain.

Application

Myosin, calcium activated from porcine heart has been used in the induction of experimental autoimmune myocarditis (EAM).

Biochem/physiol Actions

Myosin interacts with actin in muscle and non-muscle cells. Myosin molecules consist of two major regions: tails (rods) and heads. They aggregate into filaments through the tail region and interact with actin and with ATP through the head region. Myosin molecules spontaneously assemble into filaments in solutions of physiologic ionic strength and pH. Thick filament consists mainly of myosin molecules. Myosin is activated by the enzyme ATPase. This activation is the immediate source of the free energy that drives muscle contraction. It binds to the polymerized form of actin, the major constituent of the thin filament. Multiple forms of myosin heavy chains exist for each muscle type-skeletal, cardiac, smooth and non-muscle. Isomyosin forms exist in different types of skeletal muscle, depending on the physiological function of the muscle. These are designated as type I (slow-twitch) and type II (fast-twitch). Myosin is one of three classes of cytoskeletal motor proteins that have been identified. The others are kinesins and dyneins. These three types of proteins are thought to be responsible for the many movements that occur in cells. Myosin has been shown to be involved in neurosensory function, vesicle trafficking, determinant partitioning, and cortical function.
Myosin has been shown to be implicated in neurosensory function, vesicle trafficking, determinant partitioning, and cortical function. Myosins with actin-stimulated ATPase activity play a vital role in various cellular movements. Myosins I and V mediates vesicle translocation. Myosin II with a long rod like tail domain, assembles into a bipolar thick filament and facilitate muscle contraction.
Myosin interacts with actin in muscle and non-muscle cells. Myosin is one of three classes of cytoskeletal motor proteins that have been identified. The others are kinesins and dyneins. These three types of proteins are thought to be responsible for the many movements that occur in cells. Myosin has been shown to be involved in neurosensory function, vesicle trafficking, determinant partitioning, and cortical function.

Unit Definition

One unit will liberate 1.0 μmole of inorganic phosphorus from ATP per min at pH 9.0 at 25 °C in the presence of calcium.

Physical form

Solution in 50% glycerol containing 0.6 M KCl and 10 mM potassium phosphate buffer, pH 6.8.

Storage Class

10 - Combustible liquids

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable


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Los clientes también vieron

Siegel GJ
Basic Neurochemistry: Molecular, Cellular and Medical Aspects. (1999)
Huedayi Korkusuz et al.
Journal of cardiovascular magnetic resonance : official journal of the Society for Cardiovascular Magnetic Resonance, 12, 49-49 (2010-08-28)
Because endomyocardial biopsy has low sensitivity of about 20%, it can be performed near to myocardium that presented as late gadolinium enhancement (LGE) in cardiovascular magnetic resonance (CMR). However the important issue of comparing topography of CMR and histological findings
Fc Receptor?Mediated Inhibitory Effect of Immunoglobulin
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Concomitant Suppression of the Expression of Dendritic Cells
Shioji K
Circulation Research, 89(6), 540-546 (2001)
Accuracy of cardiovascular magnetic resonance in myocarditis: comparison of MR and histological findings in an animal model.
Korkusuz H
Journal of Cardiovascular Magnetic Resonance : Official Journal of the Society for Cardiovascular Magnetic Resonance, 12:49 (2010)
K Shioji et al.
FEBS letters, 472(1), 109-113 (2000-04-27)
To examine the possible involvement of a redox regulating mechanism in the pathogenesis of immune-mediated myocarditis, myocarditis was induced by immunization of porcine cardiac myosin in rats and immunohistochemistry and Western blot for thioredoxin (TRX) were performed. Immunohistochemistry for 8-hydroxy-2'-deoxyguanosine

Artículos

Myosins are a family of ATP-dependent motor proteins. Myosin II is the major contractile protein involved in eukaryotic muscle contraction by “walking” along actin microfilaments of the sarcomere

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