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A widely expressed βIII spectrin associated with Golgi and cytoplasmic vesicles

机译:广泛表达的与高尔基体和胞浆囊泡相关的βIII血影蛋白

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摘要

Spectrin is an important structural compo- nent of the plasma membrane skeleton. Heretofore- unidentified isoforms of spectrin also associate with Golgi and other organelles. We have discovered another member of the β-spectrin gene family by homology searches of the GenBank databases and by 5' rapid amplification of cDNA ends of human brain cDNAs. Collectively, 7,938 nucleotides of con- tiguous clones are predicted to encode a 271,294-Da protein, called βIII spectrin, with conserved actin-, protein 4.1-, and ankyrin-binding domains, membrane association domains 1 and 2, a spectrin dimer self-association site, and a pleckstrin- homology domain.
机译:血影蛋白是质膜骨架的重要结构成分。迄今未确认的血影蛋白同工型也与高尔基体和其他细胞器有关。我们已经通过GenBank数据库的同源搜索以及人脑cDNA cDNA末端的5'快速扩增发现了β-spectrin基因家族的另一个成员。总的来说,连续克隆的7938个核苷酸预计会编码271,294-Da蛋白,称为βIII血影蛋白,具有保守的肌动蛋白,蛋白4.1和锚蛋白结合结构域,膜缔合结构域1和2,血影蛋白二聚体自身结构。关联位点和一个pleckstrin同源域。

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