Obscurin is required for ankyrinB-dependent dystrophin localization and sarcolemma integrity.
Obscurin is required for ankyrinB-dependent dystrophin localization and sarcolemma integrity.
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依赖Ankyrinb的肌营养不良蛋白定位和肌膜完整性所必需。
DOI:
10.1083/jcb.201205118
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发表时间:
2013-02-18
期刊:
影响因子:
--
通讯作者:
Sorrentino V
中科院分区:
文献类型:
--
作者:
Randazzo D;Giacomello E;Lorenzini S;Rossi D;Pierantozzi E;Blaauw B;Reggiani C;Lange S;Peter AK;Chen J;Sorrentino V
Obscurin contributes to the organization of subsarcolemma microtubules, localization of dystrophin at costameres, and maintenance of sarcolemmal integrity in skeletal muscle fibers. Obscurin is a large myofibrillar protein that contains several interacting modules, one of which mediates binding to muscle-specific ankyrins. Interaction between obscurin and the muscle-specific ankyrin sAnk1.5 regulates the organization of the sarcoplasmic reticulum in striated muscles. Additional muscle-specific ankyrin isoforms, ankB and ankG, are localized at the subsarcolemma level, at which they contribute to the organization of dystrophin and β-dystroglycan at costameres. In this paper, we report that in mice deficient for obscurin, ankB was displaced from its localization at the M band, whereas localization of ankG at the Z disk was not affected. In obscurin KO mice, localization at costameres of dystrophin, but not of β-dystroglycan, was altered, and the subsarcolemma microtubule cytoskeleton was disrupted. In addition, these mutant mice displayed marked sarcolemmal fragility and reduced muscle exercise tolerance. Altogether, the results support a model in which obscurin, by targeting ankB at the M band, contributes to the organization of subsarcolemma microtubules, localization of dystrophin at costameres, and maintenance of sarcolemmal integrity.
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DOI:
10.1083/jcb.128.5.893
发表时间:
1995-03
期刊:
The Journal of cell biology
影响因子:
--
作者:
Giannini G;Conti A;Mammarella S;Scrobogna M;Sorrentino V
通讯作者:
Sorrentino V
影响因子:
3.3
作者:
Ford-Speelman,Diana L.;Roche,Joseph A.;Bloch,Robert J.
通讯作者:
Bloch,Robert J.
影响因子:
4
作者:
Fukuzawa, Atsushi;Lange, Stephan;Gautel, Mathias
通讯作者:
Gautel, Mathias
DOI:
10.1083/jcb.118.6.1411
发表时间:
1992-09
期刊:
The Journal of cell biology
影响因子:
--
作者:
Danowski BA;Imanaka-Yoshida K;Sanger JM;Sanger JW
通讯作者:
Sanger JW
影响因子:
4.8
作者:
Crosbie, RH;Heighway, J;Campbell, KP
通讯作者:
Campbell, KP