1887

Abstract

The taxonomic status was determined of an aerobic, facultatively methylotrophic strain, JZL-4, isolated from activated sludge. The cells were Gram-negative, asporogenous, colourless, motile, short rods. The strain utilized methanol, methylamine, formate and a variety of polycarbon compounds, but not methane, dichloromethane or CO/H, as carbon and energy sources. C compounds were assimilated via the isocitrate lyase-negative serine pathway. Optimal growth occurred at 30 °C, pH 6.5–7.5 and 0.5 % (w/v) NaCl. The major cellular fatty acids were Cω7 and C. The major phospholipids were phosphatidylethanolamine, phosphatidylcholine, phosphatidylglycerol and phosphatidylmonomethylethanolamine (PME); PME, the main phospholipid of strain JZL-4, was absent or present in only minor amounts in IM1, DM9 and DM10. The major ubiquinone was Q-10. The DNA G+C content of strain JZL-4 was 70.4 mol% ( ). Phylogenetic analysis based on 16S rRNA gene sequences revealed that the strain showed high sequence similarities to IM1 (97.2 %), DM10 (94.9 %) and DM9 (94.1 %), and showed less than 94 % similarity to strains of other species with validly published names. Strain JZL-4 had a low level of DNA–DNA relatedness (34 %) with IM1. On the basis of phenotypic, genetic and phylogenetic data, strain JZL-4 is proposed to represent a novel species of the genus , with the name sp. nov. The type strain is strain JZL-4 ( = ACCC 05406  = DSM 22718  = VKM B-2555).

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2011-07-01
2019-10-16
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vol. , part 7, pp. 1561 - 1566

Two-dimensional TLC of polar lipids of strain JZL-4 . DPG, Diphosphatidylglycerol; PC, phosphatidylcholine; PE, phosphatidylethanolamine; PG, phosphatidylglycerol; PME, phosphatidylmomomethylethanolamine; PL, unknown phospholipid; AL, unknown aminolipid; GL, unknown glycolipid; L1–L3, unknown lipids.



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