[Peculiarities of ethanol oxidation by the producer of surface-active substances Acinetobacter calcoaceticus K-4].

Activity of key-enzymes of C2-metabolism was determined in the cells of strain-producer of surface-active substances Acinetobacter calcoaceticus K-4 grown on ethanol. It is shown that ethanol and acetaldehyde oxidation in the strain K-4 is performed by pyroquinolinquinon (PQQ) and 4-nitroso-N,N-dimethylaniline (NDMA)-dependent dehydrogenases. Activity of NDMA-dependent enzymes was maximum (100-300 nmol min(-1) mg(-1) of protein) in the early exponential growth phase of A.