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  • Title: Metabolic analysis of acetate accumulation during xylose consumption by Paenibacillus polymyxa.
    Author: Marwoto B, Nakashimada Y, Kakizono T, Nishio N.
    Journal: Appl Microbiol Biotechnol; 2004 Mar; 64(1):112-9. PubMed ID: 14556038.
    Abstract:
    Paenibacillus polymyxa ATCC 12321 produced more acetic acid and less butanediol from xylose than from glucose. The product yields from xylose were ethanol (0.72 mol/mol sugar), (R,R)-2,3-butanediol (0.31 mol/mol sugar), and acetate (0.38 mol/mol sugar) while those from glucose were ethanol (0.74 mol/mol sugar), (R,R)-2,3-butanediol (0.46 mol/mol sugar), and acetate (0.05 mol/mol sugar). Higher acetate kinase activity and lower acetate uptake ability were found in xylose-grown cells than in glucose-grown cells. Furthermore, phosphoketolase activity was higher in xylose-grown cells than in glucose-grown cells. In fed-batch culture on xylose, glucose feeding raised the butanediol yield to 0.56 mol/mol sugar and reduced acetate accumulation to 0.04 mol/mol sugar.
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