title: Amino acid sequence of the alpha- and beta-globin chains of the Hiroo sea snake (Laticauda laticaudata).
abstract: We determined the hemoglobin complete amino acid sequences of the Hiroo sea snake (Laticaudia laticuada) from the intact globin chain, enzymatically digested fragments, and chemical cleavage fragments to analyze molecular evolution for classification of the sea snake. The Hiroo sea snake has two hemoglobin components, Hb-I and Hb-II, which contain different alpha- and beta-chains, respectively. This is the first report of the complete primary structure of a snake hemoglobin. The sequences were compared with those of other reptilian hemoglobins. Amino acid replacements at positions critical for structure and physiological role of hemoglobin were loosely conserved. The requirements for binding of ATP and of diphosphoglycerate as allosteric effectors at beta-globins seemed to be fullfilled.
authors.affiliation: Research Laboratory Center, Faculty of Medicine, University of Ryukyus, Okinawa, Japan. yeguchi@med.u-ryukyu.ac.jp
authors.forename: Yukinori
authors.initials: Y
authors.lastname: Eguchi
authors.forename: Tomoko
authors.initials: T
authors.lastname: Eguchi
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D000595:Amino Acid Sequence; D000818:Animals; D002852:Chromatography, Ion Exchange; D004163:Diphosphoglyceric Acids / Q000378:metabolism; D017815:Elapidae / Q000097:blood*; D005914:Globins / Q000737:chemistry* / Q000302:isolation & purification / Q000378:metabolism; D006454:Hemoglobins / Q000737:chemistry / Q000378:metabolism; D008969:Molecular Sequence Data; D030162:Reptilian Proteins / Q000097:blood / Q000737:chemistry* / Q000302:isolation & purification; D013329:Structure-Activity Relationship
chemical_list: D004163:Diphosphoglyceric Acids; D006454:Hemoglobins; D030162:Reptilian Proteins; D000255:Adenosine Triphosphate; D005914:Globins