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http://dx.doi.org/10.1111/j.1432-1033.1972.tb01968.x | DOI Listing |
Biochemistry
May 2019
Department of Chemistry , St. Mary's University, San Antonio , Texas 78228 , United States.
The flavoprotein d-6-hydroxynicotine oxidase catalyzes an early step in the oxidation of ( R)-nicotine, the oxidation of a carbon-nitrogen bond in the pyrrolidine ring of ( R)-6-hydroxynicotine. The enzyme is a member of the vanillyl alcohol oxidase/ p-cresol methylhydroxylase family of flavoproteins. The effects of substrate modifications on the steady-state and rapid-reaction kinetic parameters are not consistent with the quinone-methide mechanism of p-cresol methylhydroxylase.
View Article and Find Full Text PDFArch Microbiol
December 1976
Resting cell suspensions of Arthrobacter oxidans were shown to synthesize the inducible enantiozyme, D-6-hydroxynicotine oxidase, in the presence of D-nicotine or D-6-hydroxynicotine. The corresponding L-enantiomers, as well as gamma-methylaminopropyl-(6-OH-pyridyl-3)-ketone, which is the product of the reaction catalyzed by the enzyme, were ineffective as inducers. L-6-Hydroxynicotine inhibited induction by D-nicotine and D-6-hydroxynicotine while L-nicotine inhibited induction by D-6-hydroxynicotine and had no effect on induction by D-nicotine.
View Article and Find Full Text PDFAntersera prepared against both enantiozymes, D- and L-6-hydroxynicotine oxidase, formed precipitins in double diffusion tests with their respective antigens only. A mixture of the two antisera caused spur formation of the two precipitin lines obtained with the pure enzymes. Antiserum to L-apoprotein reacted with native L-enzyme and L-apoprotein but not with the D-sspecific enzyme.
View Article and Find Full Text PDFZ Naturforsch B Anorg Chem Org Chem Biochem Biophys Biol
September 1972
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