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Three Gram-positive, rod-shaped, oxidase-negative, non-spore-forming, non-motile bacteria (KSS-3SeT, KSS-4Se and KSS-10Se) were isolated from a coolant lubricant. 16S rRNA gene sequence analyses revealed almost identical sequences, with only a few (<10 positions) differences for these three isolates. Comparisons showed the highest similarities to Corynebacterium pilosum NCTC 11862T (97.6 % similarity with strain KSS-3SeT). Similarities with other established Corynebacterium species were lower than 97.0 %. Chemotaxonomic data studied for strain KSS-3SeT [polar lipids – major compounds phosphatidylglycerol and an unknown glycolipid, moderate amounts of phosphatidylinositol and diphosphatidylglycerol; polyamines (small amounts) – major compounds spermidine and spermine; quinones – significant amounts of menaquinones MK-9(H2), MK-8(H2) and MK-7(H2); and major fatty acids – tuberculostearic acid (10-methyl C18 : 0), C16 : 0 and C18 : 1 ω9c] were congruent with those reported for Corynebacterium. The strain showed differences in phenotype from C. pilosum. DNA–DNA hybridizations between KSS-3SeT and C. pilosum DSM 20521T yielded a relatedness of 22.9 % (20.4 % in the reciprocal assay). From these results, it is evident that the organisms represent a novel species, for which the name Corynebacterium lubricantis sp. nov. is proposed (type strain KSS-3SeT =DSM 45231T =CCUG 56567T =CCM 7546T).
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International Journal of Systematic and Evolutionary Microbiology vol. 59 , part 5, pp. 1112 - 1115
Supplementary Fig. S1. Phylogenetic analysis based on 16S rRNA gene sequences available from the EMBL database showing the position of strains KSS-3Se T, KSS-4Se and KSS-10Se, including an extended selection of reference sequences.
Supplementary Table S1. Biochemical characteristics of C. lubricantis sp. nov. and the most similar Corynebacterium species (on the basis of 16S rRNA gene sequence similarity) obtained with the API Coryne and API ZYM systems
[PDF file of Supplementary Fig. S1 and Supplementary Table S1](33 KB)