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Titolo:
REGULATION OF THE FORMATE DEHYDROGENASE GENE, FDH1, IN THE METHYLOTROPHIC YEAST CANDIDA-BOIDINII AND GROWTH-CHARACTERISTICS OF AN FDH1-DISRUPTED STRAIN ON METHANOL, METHYLAMINE, AND CHOLINE
Autore:
SAKAI Y; MURDANOTO AP; KONISHI T; IWAMATSU A; KATO N;
Indirizzi:
KYOTO UNIV,GRAD SCH AGR,DIV APPL LIFE SCI,SAKYO KU,KITASHIRAKAWA OIWAKE KYOTO 60601 JAPAN KIRIN BREWERY CO LTD,CENT LABS KEY TECHNOL,KANAZAWA KU YOKOHAMA KANAGAWA 236 JAPAN
Titolo Testata:
Journal of bacteriology
fascicolo: 14, volume: 179, anno: 1997,
pagine: 4480 - 4485
SICI:
0021-9193(1997)179:14<4480:ROTFDG>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
FORMALDEHYDE OXIDATION; HANSENULA-POLYMORPHA; EXPRESSION; TRANSFORMATION; MUTANTS; CLONING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
Y. Sakai et al., "REGULATION OF THE FORMATE DEHYDROGENASE GENE, FDH1, IN THE METHYLOTROPHIC YEAST CANDIDA-BOIDINII AND GROWTH-CHARACTERISTICS OF AN FDH1-DISRUPTED STRAIN ON METHANOL, METHYLAMINE, AND CHOLINE", Journal of bacteriology, 179(14), 1997, pp. 4480-4485

Abstract

The structural gene (FDH1) coding for NAD(+)-dependent formate dehydrogenase (FDH) was cloned from a genomic library of Candida boidinii, and the FDH1 gene was disrupted in the C. boidinii genome (fdh1 Delta) bg one-step gene disruption. In a batch culture experiment, although the fdh1 Delta strain was still able to grow on methanol, its growth was greatly inhibited and a toxic level of formate was detected in the medium. In a methanol-limited chemostat culture at a low dilution rate (0.03 to 0.05 h(-1)), formate was not detected in the culture medium of the fdh1 Delta strain; however, the fdh1 Delta strain showed only one-fourth of the growth yield of the wild-type strain, Expression of FDH1 was found to be induced by choline or methylamine (used as a nitrogen source), as well as by methanol (used as a carbon source). Induction of FDH1 was not repressed in the presence of glucose when cells weregrown on methylamine, choline, or formate, and expression of FDH1 wasshown to be regulated al; the mRNA level. Growth on methylamine or choline as a nitrogen source in a batch culture was compared between thewild type and the fdh1 Delta mutant. Although the growth of the fdh1 Delta mutant was impaired and the Level of formate was higher in the fdh1 Delta mutant than in the wild-type strain, the growth defect caused by FDH1 gene disruption was small and less severe than that caused by growth on methanol. As judged from these results, the main physiological role of FDH with all of the FDH1-inducing growth substrates seemsto be detoxification of formate, and during growth on methanol, FDH seems to contribute significantly to the energy yield.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/01/21 alle ore 04:46:56