首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >A new isoleucine substitution of Val-20 in transthyretin tetramers selectively impairs dimer-dimer contacts and causes systemic amyloidosis
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A new isoleucine substitution of Val-20 in transthyretin tetramers selectively impairs dimer-dimer contacts and causes systemic amyloidosis

机译:运甲状腺素蛋白四聚体中Val-20的新异亮氨酸替代选择性地损害二聚体-二聚体接触并引起系统性淀粉样变性

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摘要

The most frequent form of inherited amy- loidoses is associated with mutations in the transthyretin (TTR) gene coding for 127-amino acid residues of four iden- tical, noncovalently linked subunits that form a pair of dimers in the plasma protein complex. Amyloid fibrils containing the variant and to a lesser extent the wild-type form of the TTR molecule are deposited in various organs, including periph- eral nerves and the myocardium, with polyneuropathy and cardiomyopathy as major clinical manifestations.
机译:遗传淀粉样糖的最常见形式与运甲状腺素蛋白(TTR)基因中的突变有关,后者编码四个同构的,非共价连接的亚基的127个氨基酸残基,这些亚基在血浆蛋白复合物中形成一对二聚体。含有变体和较小程度的TTR分子野生型形式的淀粉样蛋白原纤维沉积在各种器官中,包括周围神经和心肌,多发性神经病和心肌病是主要的临床表现。

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