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. 1969 May;98(2):705–711. doi: 10.1128/jb.98.2.705-711.1969

Malate Utilization by a Group D Streptococcus: Physiological Properties and Purification of an Inducible Malic Enzyme

Jack London 1, Eleanor Y Meyer 1
PMCID: PMC284875  PMID: 4306540

Abstract

Growth of Streptococcus faecalis in the presence of l-malate resulted in the induction of a “malic enzyme” [l-malate:nicotinamide adenine dinucleotide (NAD) oxidoreductase (decarboxylating), E.C. 1.1.1.39]. Synthesis of the malic enzyme did not appear to be subject to catabolite repression by intermediate products of glucose or fructose dissimilation. However, malate utilization was inhibited during growth in the presence of glucose or fructose. The purified enzyme was specific for malate as substrate and NAD as cofactor. Mn+2 or Mg+2 was required for optimal activity and NH4Cl stimulated the reaction rate. Several lines of indirect evidence suggested that the streptococcal malic enzyme was involved primarily with energy production and not biosynthesis.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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