Abstract:
:We have recently identified in porcine brain a series of new peptides, designated calcitonin receptor-stimulating peptide-1 (CRSP-1), CRSP-2, and CRSP-3, but failed to find their counterparts in humans and rodents by either database searching or experimental cross-hybridization. In this study, we isolated cDNAs encoding precursors of bovine CRSP-1, canine CRSP-1, and canine CRSP-2 from their thyroid cDNA libraries. Although the deduced mature amino acid sequences of bovine and canine CRSP-1s and canine CRSP-2 showed identity with their respective porcine CRSP counterparts, none of them had a C-terminal amide structure. In LLC-PK(1) cells endogenously expressing the calcitonin (CT) receptor, bovine and canine CRSP-1s enhanced the cAMP production, while canine CRSP-2 did not stimulate it at all. Equine CGRP-I had a high identity in its amino acid sequence with porcine CRSP-1 and stimulated LLC-PK(1) cells at a potency comparable to that of porcine CT. None of these CRSPs or equine CGRP-I stimulated the CT-like receptor, even in the presence of receptor activity-modifying proteins. These results demonstrate that CRSP-1, a new class of biologically active peptide, is present in animals evolutionarily close to pigs and induces its activity through the calcitonin receptor, suggesting a wide existence and common properties of this peptide in mammals.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Katafuchi T,Hamano K,Minamino Ndoi
10.1016/j.bbrc.2003.11.114subject
Has Abstractpub_date
2004-01-02 00:00:00pages
74-9issue
1eissn
0006-291Xissn
1090-2104pii
S0006291X03025026journal_volume
313pub_type
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