title: [Catalytic properties of neuraminidase of non-cholera vibrios].
abstract: Main catalytic properties of commercially available neuraminidase preparations from noncholeric vibrios were studied. The enzymatic activity was measured using a simple resorcinol procedure. Optimal conditions for neuraminidase effect: pH 5.5-6.0 and buffer composition, were characterized. Affinity of the enzyme to various substrates was studied using 10 natural and synthetic sialoconjugates. Km values were studied for fetuin, ovomucin and transferrin used as optimal substrates. When influence of meta ions, detergents, complexes and other compounds was studied, activation of neuraminidase was found in presence of bivalent metal ions, especially of Ca2+, while chelate-forming complexes and heavy metal salts inhibited the enzyme. These results may be used in studies of the neuraminidase action mechanism and regulation of its activity.
authors.forename: S N
authors.initials: SN
authors.lastname: Lavrovskiĭ
authors.forename: T T
authors.initials: TT
authors.lastname: Berezov
mesh_terms: D002384:Catalysis; D002413:Cations, Divalent; D003902:Detergents; D006863:Hydrogen-Ion Concentration; D008670:Metals / Q000737:chemistry; D009439:Neuraminidase / Q000378:metabolism*; D010059:Ovomucin / Q000378:metabolism; D013379:Substrate Specificity; D014168:Transferrin / Q000378:metabolism; D014733:Vibrio / Q000201:enzymology*; D000509:alpha-Fetoproteins / Q000378:metabolism
chemical_list: D002413:Cations, Divalent; D003902:Detergents; D008670:Metals; D014168:Transferrin; D000509:alpha-Fetoproteins; D010059:Ovomucin; D009439:Neuraminidase
vernacular_title: Kataliticheskie svoĭstva neĭraminidazy nekholernykh vibrionov.