Mutants of Coprinus selected for resistance to D-glucosamine and L-sorbose
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Mutants of Coprinus selected for resistance to D-glucosamine and L-sorbose.
Mutants resistant to growth inhibition have been obtained by selecting on media containing inhibitory concentrations of either D-glucosamine or Lsorbose. All of the mutants isolated were found to be sugar transport-defective and cross-resistant to growth inhibition by the three analogues 2-deoxy-Dglucose, D-glucosamine and L-sorbose. Like the mutants previously selected for resistance to 2-deox...
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The glucose analogue 2-deoxy-D-glucose seriously inhibits the growth of Coprinus lagopus. Following treatment with iV-methyl-iV'-nitro-i^nitrosoguanidine 388 resistant mutants were isolated. It is shown that the mutants isolated are probably allelic; they were phenotypically similar and no complementation was observed. The mutants were pleiotropic in the sense that although they were initially ...
متن کاملNADPH-dependent L-sorbose reductase is responsible for L-sorbose assimilation in Gluconobacter suboxydans IFO 3291.
The NADPH-dependent L-sorbose reductase (SR) of L-sorbose-producing Gluconobacter suboxydans IFO 3291 contributes to intracellular L-sorbose assimilation. The gene disruptant showed no SR activity and did not assimilate the once-produced L-sorbose, indicating that the SR functions mainly as an L-sorbose-reducing enzyme in vivo and not as a D-sorbitol-oxidizing enzyme.
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15 صفحه اولL-sorbose reductase and its transcriptional regulator involved in L-sorbose utilization of Gluconobacter frateurii.
Upstream of the gene for flavin adenine dinucleotide (FAD)-dependent D-sorbitol dehydrogenase (SLDH), sldSLC, a putative transcriptional regulator was found in Gluconobacter frateurii THD32 (NBRC 101656). In this study, the whole sboR gene and the adjacent gene, sboA, were cloned and analyzed. sboR mutation did not affect FAD-SLDH activity in the membrane fractions. The SboA enzyme expressed an...
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ژورنال
عنوان ژورنال: Genetical Research
سال: 1973
ISSN: 0016-6723,1469-5073
DOI: 10.1017/s0016672300013008