1887

Abstract

A new genus, , and one new species are described for a group of seven strains of facultatively methylotrophic bacteria with the serine pathway of C assimilation. These bacteria are aerobic. Gram-negative, non-spore-forming, motile, colourless rods that multiply by binary fission. Their DNA base content ranges from 66 to 70 mol % G+C. Their cellular fatty acid profile consists primarily of C -vaccenic and C cyclopropane acids. The major hydroxy acid is 3-OH C. The main ubiquinone is Q-10. The dominant cellular phospholipids are phosphatidylethanolamine and phosphatidylcholine. The new isolates have a low level of DNA-DNA homology (5–10%) with the type strains of the serine pathway methylobacteria belonging to the genera , , and . Another approach, involving 16S rRNA gene sequence analysis of strain IM1, has shown that the new isolates represent a separate branch within the a-2 subclass of the . The type species of the new genus is sp. nov., with the type strain IM1 (= VKM B-1606).

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1998-10-01
2024-04-25
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