Definitions for utrophin

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Wiktionary

  1. utrophin(Noun)

    A cytoskeleton protein homologous with dystrophin

Freebase

  1. Utrophin

    Utrophin is a protein that in humans is encoded by the UTRN gene. The protein encoded by this gene is a component of the cytoskeleton. Utrophin was found during research into Duchenne's muscular dystrophy. The name is a contraction for ubiquitous dystrophin. The 900 kb gene for utrophin is found on the long arm of human chromosome 6. Utrophin was discovered due to its homology with dystrophin. It was found by screening a peptide containing the C-terminal domain of dystrophin against cDNA libraries. The homology varies over its full length from less than 30% in regions of the central rod structural domain, to 85% for the actin binding domain. The tertiary structure of utrophin contains a C-terminus that consists of protein–protein interaction motifs that interact with dystroglycan, a central rod region consisting of a triple coiled-coil repeat, and an actin-binding N-terminus. In normal muscle cells, utrophin is located at the neuromuscular synapse and myotendinous junctions. It is necessary for normal membrane maintenance, and for the clustering of the acetylcholine receptor. In adult humans, utrophin RNA is found ubiquitously, as the name implies, being abundant in the brain, kidney, liver, lung, muscle, spleen and stomach. In the human fetus during muscle differentiation, utrophin is found at the sarcolemma. It disappears when the fetus begins to express dystrophin.

U.S. National Library of Medicine

  1. Utrophin

    An autosomally-encoded 376-kDa cytoskeletal protein that is similar in structure and function to DYSTROPHIN. It is a ubiquitously-expressed protein that plays a role in anchoring the CYTOSKELETON to the PLASMA MEMBRANE.

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