title: The complete amino acid sequence of growth hormone from sturgeon (Acipencer guldenstadti).
abstract: The complete amino acid sequence of growth hormone (GH) from a chondrostean species, the sturgeon (Acipencer gludenstaditi), has been determined. Two variants of GH, termed GH I and GH II, were isolated from the pituitary by alkaline extraction, gel filtration on a Sephadex G-100 column, and reversed-phase high-performance liquid chromatography (rpHPLC) on a TSK gel ODS-120T column. The purified proteins were confirmed to be GHs by immunoblotting using bovine and chum salmon GH antisera. For determining of the primary structures, these GHs were digested with lysyl endopeptidase and cleaved with cyanogen bromide. The resulting fragments were separated by rpHPLC and subjected to sequence analysis on an automated gas-phase sequencer employing an Edman method. Both GHs consist of 190 amino acid residues, and contain two disulfide linkages at positions 52-163 and 180-188. The GHs differ from each other at only three positions. Sequence comparison with GHs from other vertebrates revealed that sturgeon GHs have greater sequence homology with tetrapod GHs (63-76%) than with teleost GHs (42-63%).
authors.affiliation: Laboratory of Molecular Endocrinology, School of Fisheries Sciences, Kitasato University, Iwate, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Yasuda
authors.forename: K
authors.initials: K
authors.lastname: Yamaguchi
authors.forename: T
authors.initials: T
authors.lastname: Noso
authors.forename: H
authors.initials: H
authors.lastname: Papkoff
authors.forename: A L
authors.initials: AL
authors.lastname: Polenov
authors.forename: C S
authors.initials: CS
authors.lastname: Nicoll
authors.forename: H
authors.initials: H
authors.lastname: Kawauchi
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D005399:Fishes; D014644:Genetic Variation; D013006:Growth Hormone / Q000737:chemistry / Q000235:genetics / Q000302:isolation & purification*; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000302:isolation & purification; D010902:Pituitary Gland / Q000737:chemistry; D016415:Sequence Alignment
chemical_list: D010446:Peptide Fragments; D013006:Growth Hormone