Anaerobic degradation of 1,2-propanediol by a new Desulfovibrio strain and D. alcoholovorans.
A sulfate-reducing bacterium, strain HDv, was isolated from the anoxic soil of a ricefield using lactate as electron donor. Cells were gram-negative, motile, nonsporulating curved rods, with single polar flagella. Substrates were incompletely oxidized to acetate and included glycerol, 1,2- and 1,3-propanediol. Sulfate, sulfite, thiosulfate, elemental sulfur, fumarate, maleate, and malate were utilized as electron acceptors. Pyruvate, fumarate, maleate, malate and dihydroxyacetone were fermented. Desulfoviridin and c-type cytochromes were present. The DNA base composition was 66.6 +/- 0.3 mol% G+C. The isolate was identified as a Desulfovibrio sp.; its metabolic properties were somewhat different from those of previously described Desulfovibrio species. Comparative biochemical study of 1,2-propanediol dissimilation by the new isolate and Desulfovibrio alcoholovorans showed that NAD-dependent dehydrogenases play a key role in the catabolism of this substrate. The hypothetical pathways of 1,2-propanediol degradation by Desulfovibrio spp. are presented.
Ouattara
A S
AS
ORSTOM, Laboratoire de Microbiologie, Université de Provence, Marseille, France.
Cuzin
N
N
Traore
A S
AS
Garcia
J L
JL
D000693:Anaerobiosis; D003901:Desulfovibrio / Q000166:cytology / Q000201:enzymology* / Q000302:isolation & purification / Q000502:physiology; D010088:Oxidoreductases / Q000378:metabolism; D010770:Phosphotransferases / Q000378:metabolism; D019946:Propylene Glycol; D011409:Propylene Glycols / Q000378:metabolism*
D011409:Propylene Glycols; D019946:Propylene Glycol; D010088:Oxidoreductases; D010770:Phosphotransferases