title: Pentitol metabolism in Lactobacillus casei.
abstract: Strains of Lactobacillus casei capable of growing on either ribitol or xylitol carry out a heterolactic fermentation producing ethanol, acetate, and a mixture of D- and L-lactate. Following conversion of the pentitols to ribulose 5-phosphate or xylulose 5-phosphate via enzymatic steps unique to these organisms, the intermediate products are further metabolized by enzymes of the pentose pathway. The initial enzymes of the pathway, i.e., pentitol:phosphoenolypyruvate phosphotransferase and penititol phosphate dehydrogenase, do not appear to be stringently regulated by glucose or intermediate products of glycolysis.
mesh_terms: D000085:Acetates / Q000378:metabolism; D000431:Ethanol / Q000378:metabolism; D005285:Fermentation; D005947:Glucose / Q000378:metabolism; D007295:Inositol Phosphates / Q000096:biosynthesis; D007773:Lactates / Q000096:biosynthesis; D007780:Lacticaseibacillus casei / Q000378:metabolism*; D012255:Ribitol / Q000378:metabolism*; D012266:Ribose / Q000378:metabolism; D013401:Sugar Alcohol Dehydrogenases / Q000096:biosynthesis; D013402:Sugar Alcohols / Q000378:metabolism*; D013403:Sugar Phosphates / Q000096:biosynthesis; D014993:Xylitol / Q000378:metabolism*
chemical_list: D000085:Acetates; D007295:Inositol Phosphates; D007773:Lactates; D013402:Sugar Alcohols; D013403:Sugar Phosphates; D000431:Ethanol; D012255:Ribitol; D012266:Ribose; D013401:Sugar Alcohol Dehydrogenases; D005947:Glucose; D014993:Xylitol