Methylophilus quaylei sp. nov., a new aerobic obligately methylotrophic bacterium.
A new obligately methylotrophic bacterium (strain MTT) with the ribulose monophosphate pathway of carbon assimilation is described. The isolate, utilizing only methanol, is an aerobic, Gram-negative, asporogenous, non-motile short rod multiplying by binary fission. Its cellular fatty acids profile consists primarily of straight-chain saturated C16:0 and unsaturated C16:l acids. The major ubiquinone is Q-8. The dominant phospholipids are phosphatidylethanolamine and phosphatidylglycerol. Diphosphatidylglycerol (cardiolipin) is absent. Optimal growth conditions are 25-29 degree C, pH 6.5 - 7.5, 0.5% CH3OH and 0.05% NaCl. Strain MTT lacks alpha-ketoglutarate dehydrogenase, the glyoxylate shunt enzymes, and glutamate dehydrogenase. Ammonium is assimilated by the operation of the glutamate cycle enzymes: glutamine synthetase and glutamate synthase. An exopolysaccharide consisting of rhamnose, glucose and galactose is formed under nitrogen limitation. The G + C content of the DNA is 54.0 mol%. Based on 16S rDNA sequence analysis and DNA-DNA relatedness (29-34%) with type strains of the genus Methylophilus, the novel isolate was classified as a new species of this genus and named Methylophilus quaylei MTT (VKM B-2338T, DSMZ, etc.).
Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, 142290 Pushchino, Moscow region, Russian Federation.
Nina
N
Doronina
Ekaterina
E
Ivanova
Yuri
Y
Trotsenko
Anna
A
Pshenichnikova
Ekaterina
E
Kalinina
Vitaly
V
Shvets
D000332:Aerobiosis; D001482:Base Composition; D004269:DNA, Bacterial / Q000737:chemistry / Q000302:isolation & purification; D004275:DNA, Ribosomal / Q000737:chemistry / Q000302:isolation & purification; D004783:Environmental Microbiology; D020459:Genes, rRNA; D005969:Glutamate Dehydrogenase / Q000032:analysis; D005970:Glutamate Synthase; D005974:Glutamate-Ammonia Ligase / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D007655:Ketoglutarate Dehydrogenase Complex / Q000032:analysis; D008055:Lipids / Q000032:analysis; D000432:Methanol / Q000378:metabolism*; D020629:Methylophilus / Q000145:classification* / Q000166:cytology / Q000302:isolation & purification* / Q000502:physiology; D008969:Molecular Sequence Data; D010802:Phylogeny; D011135:Polysaccharides, Bacterial / Q000096:biosynthesis; D000644:Quaternary Ammonium Compounds / Q000378:metabolism; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013696:Temperature; D014451:Ubiquinone / Q000032:analysis
D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D008055:Lipids; D011135:Polysaccharides, Bacterial; D000644:Quaternary Ammonium Compounds; D012336:RNA, Ribosomal, 16S; D014451:Ubiquinone; C030778:ubiquinone 8; D007655:Ketoglutarate Dehydrogenase Complex; D005970:Glutamate Synthase; D005969:Glutamate Dehydrogenase; D005974:Glutamate-Ammonia Ligase; D000432:Methanol