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Titolo:
OXIDATION REACTIONS CATALYZED BY MANGANESE PEROXIDASE ISOENZYMES FROMCERIPORIOPSIS-SUBVERMISPORA
Autore:
URZUA U; LARRONDO LF; LOBOS S; LARRAIN J; VICUNA R;
Indirizzi:
PONTIFICIA UNIV CATOLICA CHILE,FAC CIENCIAS BIOL,BIOQUIM LAB,CASILLA 114-D SANTIAGO CHILE PONTIFICIA UNIV CATOLICA CHILE,FAC CIENCIAS BIOL,BIOQUIM LAB SANTIAGOCHILE
Titolo Testata:
FEBS letters
fascicolo: 2, volume: 371, anno: 1995,
pagine: 132 - 136
SICI:
0014-5793(1995)371:2<132:ORCBMP>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
BASIDIOMYCETE PHANEROCHAETE-CHRYSOSPORIUM; LIGNIN PEROXIDASE; MN-PEROXIDASE; GLYOXAL OXIDASE; BIODEGRADATION; ENZYME;
Keywords:
LIGNIN DEGRADATION; BASIDIOMYCETE; PEROXIDASE; MANGANESE; ENZYMATIC OXIDATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
31
Recensione:
Indirizzi per estratti:
Citazione:
U. Urzua et al., "OXIDATION REACTIONS CATALYZED BY MANGANESE PEROXIDASE ISOENZYMES FROMCERIPORIOPSIS-SUBVERMISPORA", FEBS letters, 371(2), 1995, pp. 132-136

Abstract

A total of 11 manganese peroxidase isoenzymes (MnP1-MnP11) with isoelectric points (pIs) in the range of 4.58-3.20 were isolated from liquid- and solid-state cultures of the basidiomycete Ceriporiopsis subvermispora. In the presence of hydrogen peroxide, these isoenzymes showed different requirements for Mn(II) in the oxidation of vanillylacetone,o-dianisidine, p-anisidine and ABTS, whereas oxidation of guaiacol byany isoenzyme did not take place when this metal was omitted, K-m values for o-dianisidine and p-anisidine in the absence of Mn(II) are in the range of 0.5-1.0 mM and 4.5-42.0 mM, respectively, Oxalate and citrate, but not tartrate, accelerate the oxidation of o-dianisidine, both in the presence and in the absence of Mn(II). MnPs from this fungus are able to oxidize kojic acid without externally added hydrogen peroxide, indicating that they can also act as oxidases. In this reaction, however, the requirement for Mn(II) is absolute.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 01:00:17