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Bipolar filaments formed of polymers of a muscle-specific myosin II isoform, found in the middle of sarcomeres in myofibrils. Any constituent part of the cytoplasm, all of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures. Any constituent part of a contractile fiber, a fiber composed of actin, myosin, and associated proteins, found in cells of smooth or striated muscle. Fibers, composed of actin, myosin, and associated proteins, found in cells of smooth or striated muscle. Filaments formed of actin and associated proteins; attached to Z discs at either end of sarcomeres in myofibrils. The contractile element of skeletal and cardiac muscle; a long, highly organized bundle of actin, myosin, and other proteins that contracts by a sliding filament mechanism. The dark-staining region of a sarcomere, in which myosin thick filaments are present; the center is traversed by the paler H zone, which in turn contains the M line. The repeating unit of a myofibril in a muscle cell, composed of an array of overlapping thick and thin filaments between two adjacent Z discs. A region of a sarcomere that appears as a light band on each side of the Z disc, comprising a region of the sarcomere where thin (actin) filaments are not overlapped by thick (myosin) filaments; contains actin, troponin, and tropomyosin; each sarcomere includes half of an I band at each end.

View Gene Ontology (GO) Term

GO TERM SUMMARY

Name: sarcomere
Acc: GO:0030017
Aspect: Cellular Component
Desc: The repeating unit of a myofibril in a muscle cell, composed of an array of overlapping thick and thin filaments between two adjacent Z discs.
Proteins in PDR annotated with:
   This term: 62 [Search]
   Term or descendants: 283 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0030017 - sarcomere (interactive image map)

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