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  • Title: Conservation and diversity in families of coated vesicle adaptins.
    Author: Ponnambalam S, Robinson MS, Jackson AP, Peiperl L, Parham P.
    Journal: J Biol Chem; 1990 Mar 25; 265(9):4814-20. PubMed ID: 1969413.
    Abstract:
    The complete sequence of the beta adaptin subunit of the plasma membrane adaptor complex from coated vesicles has been elucidated. Complementary cDNA clones from human fibroblasts, rat lymphocytes, and bovine lymphocytes have been isolated, sequenced, and compared with each other and with beta adaptin sequences from rat brain (Kirchhausen, T., Nathanson, K.L., Matsui, W., Vaisberg, A., Chow, E.P., Burne, C., Keen, J.H., and Davis, A.E. (1989) Proc. Natl. Acad. Sci. U.S.A. 86, 2612-2616). Surprisingly, the 937-amino acid beta adaptin polypeptide is totally conserved between species. This remarkable homology contrasts with the absence of significant sequence similarity between the alpha (Robinson, M.S. (1989) J. Cell Biol. 108, 833-842) and beta adaptins of the plasma membrane adaptor complex. Diversity within each adaptin family is created by the expression of different genes and by tissue-specific differential splicing. The structures of the beta and alpha adaptins can both be divided into two globular domains interconnected by a variable and potentially flexible stalk domain.
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