The structural domains of cAMP-dependent protein kinase I. Characterization of two sites of proteolytic cleavage and homologies to cAMP-dependent protein kinase II.

Abstract

The regulatory subunit of cAMP-dependent protein kinase I has been cleaved proteolytically into two structurally independent domains. The larger domain (35K with trypsin or thermolysin and 31K with chymotrypsin) corresponded to the COOH-terminal end of the polypeptide chain and retained the cAMP binding site(s). The smaller domain (11 to 12K with trypsin… (More)

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