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- W1502376598 abstract "Site-specific, truncated, and sequence-simplified analogs of the hormone [Arg8]vasopressin were investigated for the relationship between their abilities to recognize immobilized bovine neurophysin and to promote neurophysin self-association. Peptide binding to neurophysin was measured quantitatively by analytical high performance affinity chromatography on immobilized bovine neurophysin II. Neurophysin self-association, measured as binding of soluble to immobilized neurophysin, was promoted (made higher affinity) by soluble peptide hormone and its analogs, with the effect of particular peptides being proportional to their binding affinities for neurophysin. Sequence-redesigned peptides able to recognize neurophysin, including dipeptide amides, were able to potentiate the self-association to the same extent as the natural hormone when tested at concentrations adjusted to effect equal degrees of saturation of neurophysin. The relationship between peptide affinity to neurophysin and the potentiation of self-association suggests that the latter is directly dependent on the former and can occur even with limited segments of hormone sequence. The data fit best to a model in which hormone binding and self-association surfaces of neurophysin are separate and linked through the neurophysin molecule to produce cooperativity (hormone-promoted self-association). Given that only limited structural elements of hormone are required for promoting self-association, the results fit less well with models in which cooperativity requires that hormone make dimer-stabilizing contacts with both self-associating subunits of neurophysin simultaneously." @default.
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- W1502376598 date "1988-09-01" @default.
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- W1502376598 title "Structural requirements of peptide hormone binding for peptide-potentiated self-association of bovine neurophysin II." @default.
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- W1502376598 doi "https://doi.org/10.1016/s0021-9258(18)68275-4" @default.
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