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  • 1
    ISSN: 1572-9699
    Schlagwort(e): continuous culture ; enzyme levels ; Methylobacillus flagellatum ; obligate methylotroph
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract In methanol-limited continuous cultures of the obligate methylotrophic bacteriumMethylobacillus flagellatum grown at rates from 0.05 to 0.63 h-1, and also in an oxyturbidostat culture ofM. flagellatum growing at the rate of 0.73 h-1, levels of methanol dehydrogenase, enzymes of formaldehyde oxidation (both linear and cyclic) and assimilation (RuMP cycle), a number of intermediary metabolism and TCA cycle enzymes and also ‘dye-linked’ formaldehyde dehydrogenase were determined. It was shown that the activities of dissimilatory enzymes, with the exception of ‘dye-linked’ formaldehyde dehydrogenase, decreased with increasing growth rate. Activities of assimilative enzymes and activities of the TCA cycle enzymes detected as well as the ‘dye-linked’ formaldehyde dehydrogenase activity, increased with increasing growth rate. A periplasmic location was shown for the latter enzyme and a role in formaldehyde detoxification was proposed.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 0006-3592
    Schlagwort(e): methylotroph ; continuous culture ; oxiturbidostat ; growth-limiting substrate pulse ; Chemistry ; Biochemistry and Biotechnology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: The growth characteristics of a chemostat culture of the obligate methylotrophic bacterium Methylobacillus flagellatum have been determined. Steady-state cultures growing at a rate of 0.73-0.74 h-1, equal to the maximal growth rate, were obtained under oxyturbidostat cultivation conditions. The response of a chemostat culture to a pulse increase of methanol concentration was studied. It was shown that slow and rapidly growing cultures of M. flagellatum responded differently to pulse methanol addition. The growth characteristics of slow-growing cultures decreased after methanol addition compared to those of stationary chemostat cultures. The growth characteristics of rapidly growing cultures were practically unchanged with and without pulse methanol addition.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 9 (1989), S. 219-225 
    ISSN: 0138-4988
    Schlagwort(e): Life Sciences ; Life Sciences (general)
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: We report here the construction of a promoter-probe vector, pRS2, which can be utilized in either Acetobacter methanolicus MB 58 or Escherichia coli due to the presence of broad-host-range replicon RSF 1010. The vector provides several unique restriction sites for promoter cloning as well as resistance markers for the selection of transformants. The promoter-probe vector was constructed by inserting an EcoRI-SalI-polylinker fragment of pUC 19 into EcoRI/SalI digested pMK 16. The resulting plasmid, pRS1, was cloned into the unique EcoRI site of the broad-host-range plasmid RSF 1010.The vector was used to clone promoter-containing sequences derived from the A. methanolicus MB 58 chromosome as well as the E. coli lac-promoter.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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