- Phenotypic and genomic characteristics of Brevibacterium zhoupengii sp. nov., a novel halotolerant actinomycete isolated from bat feces
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Yuyuan Huang , Lingzhi Dong , Jian Gong , Jing Yang , Shan Lu , Xin-He Lai , Dong Jin , Qianni Huang , Ji Pu , Liyun Liu , Jianguo Xu
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J. Microbiol. 2022;60(10):977-985. Published online August 19, 2022
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DOI: https://doi.org/10.1007/s12275-022-2134-8
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 Abstract
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Two strictly aerobic, Gram-staining-positive, non-spore-forming,
regular rod-shaped (approximately 0.7 × 1.9 mm)
bacteria (HY170T and HY001) were isolated from bat feces
collected from Chongzuo city, Guangxi province (22°2054N,
106°4920E, July 2011) and Chuxiong Yi Autonomous Prefecture,
Yunnan province (25°0910N, 102°0439E, October
2013) of South China, respectively. Optimal growth is obtained
at 25–28°C (range, 4–32°C) on BHI-5% sheep blood
plate with pH 7.5 (range, 5.0–10.0) in the presence of 0.5–
1.0% NaCl (w/v) (range, 0–15% NaCl [w/v]). The phylogenetic
and phylogenomic trees based respectively on the 16S
rRNA gene and 845 core gene sequences revealed that the
two strains formed a distinct lineage within the genus Brevibacterium,
most closely related to B. aurantiacum NCDO
739T (16S rRNA similarity, both 98.5%; dDDH, 46.7–46.8%;
ANI, 91.9–92.1%). Strain HY170T contained MK-8(H2), diphosphatidylglycerol
(DPG) and phosphatidylglycerol (PG),
galactose and ribose as the predominant menaquinone, major
polar lipids, and main sugars in the cell wall teichoic acids,
respectively. The meso-diaminopimelic acid (meso-DAP)
was the diagnostic diamino acid of the peptidoglycan found
in strain HY170T. Anteiso-C15:0 and anteiso-C17:0 were the
major fatty acids (> 10%) of strains HY170T and HY001, with
anteiso-C17:1A predominant in strain HY170T but absent in
strain HY001. Mining the genomes revealed the presence
of secondary metabolite biosynthesis gene clusters encoding
for non-alpha poly-amino acids (NAPAA), ectoine, siderophore,
and terpene. Based on results from the phylogenetic,
chemotaxonomic and phenotypic analyses, the two strains
could be classified as a novel species of the genus Brevibacterium,
for which the name Brevibacterium zhoupengii sp.
nov. is proposed (type strain HY170T = CGMCC 1.18600T
= JCM 34230T).
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Citations
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