Direct interaction of β-dystroglycan with F-actin
Direct interaction of β-dystroglycan with F-actin
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DOI:
10.1042/bj20030808
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发表时间:
2003-10-15
影响因子:
4.1
通讯作者:
Winder, SJ
中科院分区:
文献类型:
--
作者:
Chen, YJ;Spence, HJ;Winder, SJ
Dystroglycans are essential transmembrane adhesion receptors for laminin. alpha-Dystroglycan is a highly glycosylated extracellular protein that interacts with laminin in the extracellular matrix and the transmembrane region of beta-dystroglycan. beta-Dystroglycan, via its cytoplasmic tail, interacts with dystrophin and utrophin and also with the actin cytoskeleton. As a part of the dystrophin-glycoprotein complex of muscles, dystroglycan is also important in maintaining sarcolemmal integrity. Mutations in dystrophin that lead to Duchenne muscular dystrophy also lead to a loss of dystroglycan from the sarcolemma, and chimaeric mice lacking muscle dystroglycan exhibit a severe muscular dystrophy phenotype. Using yeast two-hybrid analysis and biochemical and cell biological studies, we show, in the present study, that the cytoplasmic tail of beta-dystroglycan interacts directly with F-actin and, furthermore, that it bundles actin filaments and induces an aberrant actin phenotype when overexpressed in cells.