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- W2186345830 abstract "Byusing membrane-bound dehydrogenases, Gluconobacter oxydans characteristically accomplishes single-step oxidation ofmany polyols andquantitative release oftheoxidation product into themedium. Thesecells typically differentiatebyforming intracytoplasmic membranes (ICM)after exponential growth on glycerol. Earlier experiments demonstrated thatglycerol-grown cells containing ICM oxidized glycerol more rapidly thancells whichwere harvested during exponential growth andlacked ICM(Claus etal., J.Bacteriol. 123:1169-1183). Thisreportdemonstrates thatICM arealsoformedafter growth on sorbitol. Sorbitol-grown, ICM-containing maximumstationary-phase (MSP)cells showed from50to300%greater oxidation (respiration) rateson mannitol, glycerol, glucose, meso-erythritol, andmeso-inositol thandidexponential-phase (EXP) cells whichlacked ICM.BothEXP andMSP cells exhibited maximumsorbitol oxidation atpH5.0, 38°C, and5% (wt/vol) sorbitol. Whenassayed underthese optimumconditions, ICM-containing MSP cells demonstrated a 72%increase in respiration on sorbitol compared withthatofEXP cells lacking ICM(oxygen quotients of3,100 and1,800, respectively). Gaschromatographic studies showed thatsorbose was theonlydetectable product released fromcells during oxygen quotient analysis. Thespecific activity ofparticulate-bound sorbitol dehydrogenasefromICM-containing MSP cells was twicethatobtained fromparticulate fractions prepared fromEXPcells lacking ICM.Theseresults showthatneither ICMformation after exponential growth norincreased respiration ofother polyols isdependent uponthepolyol usedtogrowcells. Ourresults suggest thatincreased respiratory activity ofMSP cells iscausedbothbyICM formation andby increased synthesis (oractivity) ofthepolyol dehydrogenases foundinthese membranes. Gluconobacter oxydans subspecies suboxydans(10), formerly called Acetobacter suboxydans,isastrict aerobe thatcharacteristical ly" @default.
- W2186345830 created "2016-06-24" @default.
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- W2186345830 date "1982-01-01" @default.
- W2186345830 modified "2023-09-27" @default.
- W2186345830 title "Effect ofIntracytoplasmic Membrane Development on Oxidation ofSorbitol andOtherPolyols byGluconobacter oxydans" @default.
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