Substrate specificity of the gastrin-amidating enzyme.

Abstract excerpt

As is the case with many other peptide hormones of the brain and gut, gastrin requires a carboxyl-terminal amide moiety for optimal biological activity. In the structure of progastrin, the carboxyl-terminal Phe of gastrin is followed by the sequence Gly93-Arg94-Arg95, which must be processed sequentially by an endoprotease, a carboxypeptidase, and an amidating enzyme to produce amidated bioactive gastrin. To...

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