title: Evolutionary history of the calcitonin gene-related peptide family in vertebrates revealed by comparative genomic analyses.
abstract: The calcitonin gene-related peptide (CGRP) family is composed of CGRP, amylin and adrenomedullin (AM) in mammals. In teleost fish, AM forms an independent subfamily of five members (AM1-5), which inspired us to trace the evolutionary history of the CGRP family throughout vertebrates by comparative genomic approach. Linkage mapping and synteny analyses of the CGRP family genes in medaka, Oryzias latipes, revealed that AM1/CGRP, AM2/amylin, and AM5 genes were located on respective proto-chromosomes before the divergence of teleost lineage. In teleost fish, additional whole genome duplication generated AM1/4, CGRP1/2, AM2/3, but one of the duplicated amylin and AM5 genes was silenced. In mammals, the amylin or AM2 gene was translocated to different chromosomes, while the CGRP gene was multiplied in tandem to generate CGRP-alpha,beta, and recently identified calcitonin receptor-stimulating peptide genes. Based on these data, we identified a novel AM5 gene in several mammalian species as we previously did for AM2.
authors.affiliation: Ocean Research Institute, University of Tokyo, Nakano, Tokyo 164-8639, Japan. ogoshi@ori.u-tokyo.ac.jp
authors.forename: Maho
authors.initials: M
authors.lastname: Ogoshi
authors.forename: Koji
authors.initials: K
authors.lastname: Inoue
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Naruse
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Takei
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D015740:Calcitonin Gene-Related Peptide / Q000235:genetics*; D019143:Evolution, Molecular; D023281:Genomics; D006801:Humans; D008969:Molecular Sequence Data; D005810:Multigene Family; D009990:Oryzias / Q000235:genetics
chemical_list: D015740:Calcitonin Gene-Related Peptide