title: A kinetic study on the binding of monomeric and polymeric derivatives of NAD+ to yeast alcohol dehydrogenase.
abstract: The binding to yeast alcohol dehydrogenase of NAD+ and its five derivatives (N6-[2-[N-[2-[N-(2-methacrylamidoethyl)carbamoyl]ethyl] carbamoyl]ethyl]-NAD (I), N6-[N-[2-[N-(2-methacrylamidoethyl) carbamoyl]ethyl]carbamoylmethyl]-NAD (II), copolymer of I with acrylamide (PA-I), copolymer of II with acrylamide (PA-II), and copolymer of I with N,N-dimethylacrylamide (PDMA-I] were studied statically and kinetically by the stopped-flow method by using the quenching of the enzyme fluorescence in the presence of pyrazole. Apparent dissociation constants and apparent rate constants were determined therefrom. It was concluded that (1) the N6-CH2CH2CO group (of I) is effective in making the derivative bind more strongly as well as faster than NAD+, while the N6-CH2CO group (of II) is not; and (2) the binding of the polymer derivatives of NAD+ to the enzyme is not essentially weaker and slower than that of native NAD+, but is even faster in some cases. The coenzymic activities of the above compounds were also determined with yeast alcohol dehydrogenase, pig heart malate dehydrogenase, and rabbit muscle lactate dehydrogenase.
mesh_terms: D000426:Alcohol Dehydrogenase; D000429:Alcohol Oxidoreductases / Q000378:metabolism*; D000818:Animals; D003067:Coenzymes / Q000378:metabolism; D007700:Kinetics; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D008291:Malate Dehydrogenase / Q000378:metabolism; D009132:Muscles / Q000201:enzymology; D009206:Myocardium / Q000201:enzymology; D009243:NAD / Q000031:analogs & derivatives* / Q000378:metabolism; D011485:Protein Binding; D011817:Rabbits; D012441:Saccharomyces cerevisiae / Q000201:enzymology*; D013552:Swine
chemical_list: D003067:Coenzymes; D009243:NAD; D000429:Alcohol Oxidoreductases; D000426:Alcohol Dehydrogenase; D007770:L-Lactate Dehydrogenase; D008291:Malate Dehydrogenase