title: Pseudochelatococcus lubricantis gen. nov., sp. nov. and Pseudochelatococcus contaminans sp. nov. from coolant lubricants.
abstract: Two Gram-negative, rod-shaped, non-spore-forming bacteria, isolated from metal working fluids were investigated to determine their taxonomic positions. On the basis of 16S rRNA gene sequence phylogeny, both strains (MPA 1113(T) and MPA 1105(T)) formed a distinct cluster with 97.7 % sequence similarity between them, which was in the vicinity of members of the genera Methylobacterium, Camelimonas, Chelatococcus, Bosea, Salinarimonas and Microvirga to which they showed low sequence similarities (below 94 %). The predominant compounds in the polyamine pattern and in the quinone system of the two strains were spermidine and ubiquinone Q-10, respectively. The polar lipid profiles were composed of the major compounds: phosphatidylmonomethylethanolamine, phosphatidylglycerol, phosphatidylcholine, major or moderate amounts of diphosphatidylglycerol, two unidentified glycolipids and three unidentified aminolipids. Several minor lipids were also detected. The major fatty acids were either C19 : 0 cyclo ω8c or C18 : 1ω7c. The results of fatty acid analysis and physiological and biochemical tests allowed both, the genotypic and phenotypic differentiation of the isolates from each other, while the chemotaxonomic traits allowed them to be differentiated from the most closely related genera. In summary, low 16S rRNA gene sequence similarities and marked differences in polar lipid profiles, as well as in polyamine patterns, is suggestive of a novel genus for which the name Pseudochelatococcus gen. nov. is proposed. MPA 1113(T) ( = CCM 8528(T) = LMG 28286(T) = CIP 110802(T)) and MPA 1105(T) ( = CCM 8527(T) = LMG 28285(T)) are proposed to be the type strains representing two novel species within the novel genus, Pseudochelatococcus gen. nov., for which the names Pseudochelatococcus lubricantis sp. nov. and Pseudochelatococcus contaminans sp. nov. are suggested, respectively.
authors.affiliation: Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Kämpfer
authors.affiliation: Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany.
authors.forename: Stefanie P
authors.initials: SP
authors.lastname: Glaeser
authors.affiliation: Bremen Institute for Materials Testing, Department of Microbiology, Bremen, Germany.
authors.forename: Marco
authors.initials: M
authors.lastname: Gräber
authors.affiliation: Bremen Institute for Materials Testing, Department of Microbiology, Bremen, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Rabenstein
authors.affiliation: Bremen Institute for Materials Testing, Department of Microbiology, Bremen, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Kuever
authors.affiliation: Institut für Bakteriologie, Mykologie und Hygiene, Veterinärmedizinische Universität, A-1210 Wien, Austria.
authors.forename: Hans-Jürgen
authors.initials: HJ
authors.lastname: Busse
mesh_terms: D015373:Bacterial Typing Techniques; D001482:Base Composition; D042062:Beijerinckiaceae / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D004269:DNA, Bacterial / Q000235:genetics; D005227:Fatty Acids / Q000737:chemistry; D005858:Germany; D054327:Lubricants; D008669:Metallurgy; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013095:Spermidine / Q000737:chemistry; D014451:Ubiquinone / Q000737:chemistry
chemical_list: D004269:DNA, Bacterial; D005227:Fatty Acids; D054327:Lubricants; D012336:RNA, Ribosomal, 16S; D014451:Ubiquinone; C025204:Ubiquinone Q2; D013095:Spermidine