On the role of the C-terminus of alpha-calcitonin-gene-related peptide (alpha CGRP). The structure of des-phenylalaninamide37-alpha CGRP and its interaction with the CGRP receptor.
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ABSTRACT: alpha-Calcitonin-gene-related peptide (alpha CGRP) lacking its C-terminal phenylalaninamide residue was found not to bind to its receptor as did full-length (amidated) alpha CGRP. Investigation of the structure of these peptides by c.d. and n.m.r. revealed no significant difference, so it seemed that the effect of deleting the C-terminal phenylalaninamide on the biological activity of alpha CGRP was not by disruption of the peptide's structure. Thus the C-terminal phenylalaninamide is an important factor in this ligand-receptor interaction, and the group itself may interact directly with the receptor.
SUBMITTER: O'Connell JP
PROVIDER: S-EPMC1132503 | biostudies-other | 1993 Apr
REPOSITORIES: biostudies-other
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