THE MENAQUINONE SYSTEM IN THE CLASSIFICATION OF THE GENUS NOCARDIA

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Abstract
The menanquinone systems of 35 strains representing 24 spp. of the genus Nocardia and its related genera were determined. The genus Nocardia was mainly divided into 2 groups based on the system of quinones; the tetrahydromultiprenylmenaquinone of MK-8(H4) was found in N. farcinica, N. asteroides, N. brasiliensis, N. coeliaca, N. minima, etc., and the dihydromultiprenyl homologue of MK-8(H2) was in N. rugosa, N. lutea, N. calcarea, N. restricta, N. erythropolis, etc. The others were MK-9(H2)[MK-8(H2)] in N. polychromogenes and N. convoluta, and MK-9(H2) in N. rubropertincta. Anomalous systems of menaquinones were found in N. leishmanii [MK-9(H6)MK-9(H4)], N. turbata or Oerskovia turbata [MK-9(H4)], and N. madurae or Actinomadura madurae showing MK-9(H6)[MK-9(H8)]. Nocardia gardneri or Streptomyces gardneri agreed with N. asteroides in the system of menaquinone. These results were discussed from the taxonomic point of view.