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Titolo:
Enzymatic redox isomerization of 1,6-disaccharides by pyranose oxidase andNADH-dependent aldose reductase
Autore:
Leitner, C; Mayr, P; Riva, S; Volc, J; Kulbe, KD; Nidetzky, B; Haltrich, D;
Indirizzi:
Univ Agr Sci Vienna, Inst Food Technol, Div Biochem Engn, A-1190 Vienna, Austria Univ Agr Sci Vienna Vienna Austria A-1190 m Engn, A-1190 Vienna, Austria CNR, Ist Biocatalisi & Riconoscimento Mol, I-20131 Milan, Italy CNR Milan Italy I-20131 alisi & Riconoscimento Mol, I-20131 Milan, Italy Acad Sci Czech Republ, Inst Microbiol, CZ-14220 Prague, Czech Republic Acad Sci Czech Republ Prague Czech Republic CZ-14220 gue, Czech Republic
Titolo Testata:
JOURNAL OF MOLECULAR CATALYSIS B-ENZYMATIC
fascicolo: 4-6, volume: 11, anno: 2001,
pagine: 407 - 414
SICI:
1381-1177(20010122)11:4-6<407:ERIO1B>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
YEAST CANDIDA-TENUIS; PHANEROCHAETE-CHRYSOSPORIUM; PENIOPHORA-GIGANTEA; D-TAGATOSE; D-FRUCTOSE; D-GLUCOSE; PURIFICATION; 2-OXIDASE; XYLOSE; VERSICOLOR;
Keywords:
pyranose oxidase; aldose reductase; allolactose; isomaltulose; aldos-2-ulose;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Haltrich, D Univ Agr Sci Vienna, Inst Food Technol, Div Biochem Engn, Muthgasse 18, A-1190 Vienna, Austria Univ Agr Sci Vienna Muthgasse 18 Vienna Austria A-1190 ustria
Citazione:
C. Leitner et al., "Enzymatic redox isomerization of 1,6-disaccharides by pyranose oxidase andNADH-dependent aldose reductase", J MOL CAT B, 11(4-6), 2001, pp. 407-414

Abstract

Pyranose 2-oxidase, a homotetrameric FAD-flavoprotein from the basidiomycete Trametes multicolor, catalyzes regioselectively the oxidation of the 1 --> 6 disaccharides allolactose [beta -D-Gal p-(1 --> 6)-D-Glc], gentiobiose[beta -D-Glc p-(1 --> 6)-D-Glc], melibiose [alpha -D-Gal p-(1 --> 6)-D-Glc], and isomaltose [alpha -D-Glc p-(1 --> 6)-D-Glc] at position C-2 of theirreducing moiety, The resulting glycosyl D-arabino-hexos-2-uloses can be reduced specifically at C-l by NAD(P)H-dependent aldose reductase from the yeast Candida tenuis. By this novel, two-step redox isomerization process thefour disaccharide substrates could be converted to the corresponding keto-disaccharides allolactulose [beta -D-Gal p-(1 --> 6)-D-Fru], gentiobiulose [beta -D-Glc p-(1 --> 6)-D-Fru], melibiulose [alpha -D-Gal p-(1 --> 6)-D-Fru], and isomaltulose (palatinose, [alpha -D-Glc p-(1 --> 6)-D-Fru]) in highyields. These products could find application in food technology as alternative sweeteners. (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 23/09/20 alle ore 13:07:38