title: Purification and characterization of pyruvate kinase from lamprey (Entosphenus japonicus) muscle.
abstract: Pyruvate kinase from skeletal muscle of lamprey (Entosphenus japonicus), which is one of the most primitive living vertebrates, has been purified by approxImately 110-fold. The isolation procedure includes chromatography on Phosphocellulose, Phenyl-5PW, and Sephacryl S-300. Sodium dodecyl sulfate gel electrophoresis shows 59000 as the deduced subunit molecular weight and gel filtration shows 232000 as the tetramer of the subunits. The apparent Km for phosphoenolpyruvate and ADP are 0.41 mM and 0.31 mM at pH 7.4, respectively, when the purified enzyme is saturated with the second substrate. When the enzyme is activated in the presence of fructose-1,6-diphosphate, the Km for PEP changes to 0.087 mM, and the Hill coefficient changes from 1.3 to 0.98.
authors.affiliation: Department of Biochemistry, Faculty of Science, Okayama University of Science, 1-1, Ridai-cho, 700-0005, Okayama, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Nishikawa
authors.forename: C
authors.initials: C
authors.lastname: Kanehira
authors.forename: K
authors.initials: K
authors.lastname: Imamura
mesh_terms: D000180:Acrylic Resins / Q000494:pharmacology; D000818:Animals; D002482:Cellulose / Q000031:analogs & derivatives* / Q000494:pharmacology; D002850:Chromatography, Gel; D004305:Dose-Response Relationship, Drug; D004591:Electrophoresis, Polyacrylamide Gel; D005635:Fructosediphosphates / Q000737:chemistry; D006493:Heparin / Q000494:pharmacology; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D007798:Lampreys; D008970:Molecular Weight; D009132:Muscles / Q000201:enzymology*; D011108:Polymers / Q000494:pharmacology; D011770:Pyruvate Kinase / Q000737:chemistry* / Q000302:isolation & purification*; D013379:Substrate Specificity
chemical_list: D000180:Acrylic Resins; D005635:Fructosediphosphates; D011108:Polymers; C037239:Sephacryl Superfine; C058416:TSKgel heparin-5PW; D002482:Cellulose; D006493:Heparin; C008881:phosphocellulose; D011770:Pyruvate Kinase; C029063:fructose-1,6-diphosphate