Abstract
Acetate kinases from the genus Veillonella were divided into two types: a succinate-stimulated enzyme and a succinate-independent enzyme. Three strains, V. parvula ATCC 17743 (antigenic group II), V. parvula ATCC 17744 (V), and V. parvula ATCC 10790 (VI), contained the succinate-stimulated enzyme. Among four types strains of V. alcalescens, three strains, ATCC 17747 (I), ATCC 17746 (III), and ATCC 17748 (VII), contained the succinate-independent enzyme, whereas only one strain, ATCC 17745 (IV), contained the succinate-stimulated enzyme. Small amounts of antiserum to the purified acetate kinase from V. alcalescens ATCC 17748 completely inhibited the purified and crude enzyme activity from the strain. Classification of the enzymes on the basis of stimulation by succinate was consistent with classification based on serological reactions using the antiserum as an independent parameter. The succinate-stimulated enzyme could be separated into two classes according to the degree of sensitivity to succinate: (i) enzymes from V. parvula ATCC 17744 and V. alcalescens ATCC 17745, which could be demonstrated on gel after electrophoresis by a histochemical method to be highly stimulated by the presence of succinate in the reaction mixture, and (ii) enzymes from V. parvula ATCC 10790 and V. parvula ATCC 17743, which could be easily demonstrated without succinate. Four groups of acetate kinases from the genus Veillonella were separated by gel electrophoretic mobility. The results showed that almost all enzymes from the seven type strains were heterogeneous at the molecular level.
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