title: Isolation and characterization of four novel bioactive peptides from a polychaete annelid, Perinereis vancaurica.
abstract: Four bioactive peptides were purified from an extract of the polycheate annelid Perinereis vancaurica using an HPLC system for fractionation of the extract and the esophagus of the worm as bioassay system. The sequences of the peptides were determined to be H-Trp-Val-Val-Gly-Asp-Val-Gln-OH, H-Ala-Thr-Trp-Leu-Asp-Thr-OH, H-Trp-Met-Val-Gly-Asp-Val-Gln-OH and H-Phe-Tyr-Glu-Gly-Asp-Val-Pro-Tyr-OH. These peptides showed an excitatory activity on the esophagus of P. vancaurica. The excitatory effect of the second and fourth peptides was marked. They may be neuropeptides involved in regulation of the esophagus.
authors.affiliation: Faculty of Integrated Arts and Sciences, Hiroshima University, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Takahashi
authors.forename: Y
authors.initials: Y
authors.lastname: Furukawa
authors.forename: Y
authors.initials: Y
authors.lastname: Muneoka
authors.forename: O
authors.initials: O
authors.lastname: Matsushima
authors.forename: T
authors.initials: T
authors.lastname: Ikeda
authors.forename: T
authors.initials: T
authors.lastname: Fujita
authors.forename: H
authors.initials: H
authors.lastname: Minakata
authors.forename: K
authors.initials: K
authors.lastname: Nomoto
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001681:Biological Assay; D002851:Chromatography, High Pressure Liquid; D002852:Chromatography, Ion Exchange; D004305:Dose-Response Relationship, Drug; D004947:Esophagus / Q000737:chemistry / Q000187:drug effects; D018846:Excitatory Amino Acids / Q000302:isolation & purification / Q000494:pharmacology; D008969:Molecular Sequence Data; D009132:Muscles / Q000187:drug effects; D009479:Neuropeptides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D010455:Peptides / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D011077:Polychaeta / Q000378:metabolism*
chemical_list: D018846:Excitatory Amino Acids; D009479:Neuropeptides; D010455:Peptides