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An actinobacterial strain, designated FW100M-8T, was isolated from a gut sample of larva of Protaetia brevitarsis seulensis at the National Institute of Agricultural Sciences, Wanju-gun, South Korea. Cells were Gram-stain-positive, microaerophilic to aerobic, non-spore forming and non-motile. It grew at pH 7.0–9.0 (optimum, pH 8.0), at 15–35 °C (optimum, 28 °C) and 0–3.0 % (w/v) NaCl (optimum, 0 %). According to the 16S rRNA gene analysis, strain FW100M-8T shared the highest sequence similarity with Agromyces mediolanus DSM 20152T (98.4 %), Agromyces ulmi XIL01T (98.3 %), Agromyces indicus NIO-1018T (98.3 %), Agromyces soli MJ21T (98.3 %), and Agromyces arachidis AK-1T (97.9 %). Phylogenetic trees showed that strain FW100M-8T fell into the lineage of the genus Agromyces . The polar lipids consisted of diphosphatidylglycerol, phosphatidylglycerol, an unidentified glycolipid and an unidentified lipid. The menaquinones of strain FW100M-8T were MK-12 (46 %), MK-11 (36 %), MK-10 (14 %) and MK-13 (4 %). The major fatty acids were anteiso-C15 : 0, anteiso-C17 : 0 and iso-C16 : 0. The peptidoglycan type was supposed to be the type B1, comprising d-Ala, d-Glu, Gly and l-A2bu. The G+C content of the genomic DNA is 70.5 mol%. On the basis of the genotypic and phenotypic data, we conclude that strain FW100M-8T represents a novel species of the genus Agromyces , for which the name Agromyces protaetiae sp. nov. is proposed with strain FW100M-8T (=KACC 19308T=NBRC 113048T) as the type strain.
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