Isoprenoid Quinones in the Classification of Coryneform and Related Bacteria

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Abstract
Menaquinones were the only isoprenoid quinones found in 85 of the 95 coryneform bacteria examined. Dihydromenaquinones having 9 isoprene units were the main components isolated from corynebacterium bovis, from other glutamic acid-producing strains, and from Arthrobacter globiformis and related species. Dihydromenaquines with 8 isoprene units were found in Brevibacterium linens, the remaining Corynebacterium spp. and strains probably belonging to the genus Rhodococcus. Tetrahydromenaquinones with 8 isoprene units were found in A. simplex and A. tumescens, and with 9 isoprene units in Cellulomonas and Oerskovia. Kurthia and Curtobacterium were characterized by menaquinones with 7 and 9 isoprene units, respectively, and Microbacterium lacticum and Corynebacterium aquaticum had comparable amounts of menaquinones with 10 and 11 isoprene units. Strains received as Brevibacterium leucinophagum, C. autotrophicum, C. nephridii, Mycobacterium flavum, Mycoplana rubra and Protaminobacter ruber contained ubiquinones as their sole isoprenoid quinones. The isoprenoid quinone data correlate well with major trends in coryneform taxonomy and are of value in the classification of coryneform and related bacteria.

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