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Titolo:
CHARACTERIZATION OF HYDROGENOSOMES AND THEIR ROLE IN GLUCOSE-METABOLISM OF NEOCALLIMASTIX SP L2
Autore:
MARVINSIKKEMA FD; GOMES TMP; GRIVET JP; GOTTSCHAL JC; PRINS RA;
Indirizzi:
WAGENINGEN UNIV AGR,DEPT FOOD SCI,DIV IND MICROBIOL,POB 8129 6700 EV WAGENINGEN NETHERLANDS CNRS,CTR BIOPHYS MOLEC F-45071 ORLEANS 2 FRANCE UNIV GRONINGEN,DEPT MICROBIOL 9751 NN HAREN NETHERLANDS
Titolo Testata:
Archives of microbiology
fascicolo: 5, volume: 160, anno: 1993,
pagine: 388 - 396
SICI:
0302-8933(1993)160:5<388:COHATR>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRICHOMONAS-VAGINALIS; TRITRICHOMONAS-FOETUS; PYRUVATE METABOLISM; ISOTRICHA-PROSTOMA; ANAEROBIC FUNGI; PROTOZOA; PHOSPHOTRANSFERASE; PURIFICATION; DEGRADATION; RUMINANTIUM;
Keywords:
ANAEROBIC FUNGUS; NEOCALLIMASTIX; GLUCOSE METABOLISM; HYDROGENOSOMES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
F.D. Marvinsikkema et al., "CHARACTERIZATION OF HYDROGENOSOMES AND THEIR ROLE IN GLUCOSE-METABOLISM OF NEOCALLIMASTIX SP L2", Archives of microbiology, 160(5), 1993, pp. 388-396

Abstract

In the anaerobic fungus Neocallimastix. sp. L2 fermentation of glucose proceeds via the Embden-Meyerhof-Parnas pathway. Enzyme activities leading to the formation of succinate, lactate, ethanol, and formate are associated with the cytoplasmic fraction. The enzymes 'malic enzyme', NAD(P)H:ferredoxin oxidoreductase; pyruvate : ferredoxin oxidoreductase, hydrogenase, acetate: succinate CoA transferase and succinate thiokinase leading to the formation of H-2, CO2, acetate, and ATP are localized in microbodies. Thus, these organelles are identified as hydrogenosomes. In addition, the microbodies contain the O2-scavenging enzymes NADH- and NADPH oxidase, while NAD(P)H peroxidase, catalase, or superoxide dismutase could not be detected. In cell-free extracts from zoospores of Neocallimastix sp. L2 the specific activities of hydrogenosomal enzymes as well as the quantities of these proteins are 2- to 6-fold higher than in mycelium extracts. These findings suggest that hydrogenosomes perform an important role - especially in zoospores - as H-2-evolving, ATP-generating and O2-scavenging organelles.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 22:19:25