首页> 美国卫生研究院文献>Proceedings of the National Academy of Sciences of the United States of America >Goblin (ankyrin) in striated muscle: identification of the potential membrane receptor for erythroid spectrin in muscle cells.
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Goblin (ankyrin) in striated muscle: identification of the potential membrane receptor for erythroid spectrin in muscle cells.

机译:横纹肌中的小妖精(锚蛋白):鉴定肌肉细胞中类红血球蛋白的潜在膜受体。

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摘要

Goblin , a high molecular weight (Mr, 260,000) polypeptide of avian erythrocyte plasma membranes characterized by hormone-dependent phosphorylation, is shown by a variety of criteria to be the avian equivalent of ankyrin, the membrane attachment protein for spectrin; a polyclonal monospecific goblin antiserum reacts specifically with ankyrin from mammalian erythrocyte ghosts; goblin and ankyrin have highly homologous, although distinct, two-dimensional peptide maps; and, in reconstitution experiments, goblin binds to spectrin and band 3 in approximately the same molar ratio as ankyrin. Immunoautoradiography and immunofluorescence with goblin antiserum reveal that a serologically related polypeptide (Mr, 235,000) is present in highly purified membrane fractions of mammalian myocardium and in whole extracts of adult chicken cardiac and skeletal muscle-nonerythroid tissues which express predominantly the erythroid (alpha beta-) spectrin phenotype. Erythroid spectrin and goblin (ankyrin) are codistributed in skeletal muscle at the sarcolemma as discrete foci adjacent to the Z lines and, in pectoral muscle, also at the periphery of the Z discs. These spatial relationships indicate that goblin and spectrin in muscle cells form a structural framework that serves as the attachment site for the myofiber at the level of the Z line on the sarcolemma.
机译:地精是一种高分子量(Mr,260,000)的禽红细胞质膜多肽,其特征在于激素依赖性磷酸化,并通过多种标准显示为与锚蛋白(血影蛋白的膜附着蛋白)的禽类相当。多克隆单特异性地精抗血清与哺乳动物红细胞鬼魂的锚蛋白特异性反应;地精和锚蛋白具有高度同源的二维肽图,尽管彼此不同。并且在重建实验中,地精以与锚蛋白大致相同的摩尔比结合血影蛋白和条带3。用地精抗血清进行的免疫放射自显影和免疫荧光分析表明,哺乳动物心肌的高度纯化的膜部分以及成年鸡心脏和骨骼肌-非类红细胞组织的完整提取物中均存在与血清学相关的多肽(Mr,235,000),主要表达类红细胞(αβ- )血影蛋白表型。 Erythroid血影蛋白和地精(锚蛋白)在肌膜处共分布在肌膜处,是与Z线相邻的离散病灶,而在胸肌中也分布在Z盘周围。这些空间关系表明,肌肉细胞中的小妖精和血影蛋白形成了一个结构框架,该结构框架是肌膜上Z线水平的肌纤维附着部位。

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