Abstract
A novel actinobacterium, designated strain NEAU-HG-1T, was isolated from soil collected from Harbin, Heilongjiang Province, Northeast China and characterised using a polyphasic approach. On the basis of 16S rRNA gene sequence analysis, strain NEAU-HG-1T belonged to the genus Micromonospora, and shared high sequence similarities with Micromonospora auratinigra DSM 44815T (98.9%) and Micromonospora coerulea DSM 43143T (98.7%). Morphological and chemotaxonomic characteristics of the strain also supported its assignment to the genus Micromonospora. Cell wall contained meso-diaminopimelic acid and the whole-cell sugars were arabinose and xylose. The polar lipid contained diphosphatidylglycerol, phosphatidylethanolamine, glycolipid and phosphatidylinositol. The predominant menaquinones were MK-10(H2), MK-10(H4) and MK-10(H6). The major fatty acids were C17:0 cycle, iso-C15:0, and iso-C16:0. Furthermore, strain NEAU-HG-1T displayed a DNA–DNA relatedness of 33.8 ± 2.2% with M. coerulea DSM 43143T. The level of digital DNA–DNA hybridization between strain NEAU-HG-1T and M. auratinigra DSM 44815T was 27.2% (24.8–29.7%). The value was well below the criteria for species delineation of 70% for dDDH. Whole-genome average nucleotide identity analyses result also indicated that the isolate should be assigned to a new species under the genus Micromonospora. Therefore, it is concluded that strain NEAU-HG-1T represents a novel species of the genus Micromonospora, for which the name Micromonospora rubida sp. nov. is proposed, with NEAU-HG-1T (= CGMCC 4.7479T = JCM 32386T) as the type strain.
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Data availability
The GenBank/EMBL/DDBJ Accession Number for the 16S rRNA gene sequence of strain NEAU-HG-1T is MG753996. The GenBank/EMBL/DDBJ accession number for the partial gyrB gene sequence of strain NEAU-HG-1T is MW091032. The Whole Genome Shotgun project has been deposited at DDBJ/ENA/GenBank under the accession JAAALO000000000. The version described in this paper is version JAAALO000000000.1.
Abbreviations
- ANI:
-
Average nucleotide identity
- MEGA:
-
Molecular evolutionary genetics analysis
- ISCC-NBS:
-
Inter-society color council-national bureau of standards
- TLC:
-
Thin-layer chromatography
- GC–MS:
-
Gas chromatography–mass spectrometer
- ISP:
-
International Streptomyces project
- BA:
-
Bennett’s agar
- NA:
-
Nutrient agar
- CGMCC:
-
China general microbiological culture collection center
- DSM:
-
Deutsche Sammlung von Mikroorganismen und Zellkulturen
- dDDH:
-
Digital DNA:DNA hybridization
- DPG:
-
Ddiphosphatidylglycerol
- PE:
-
Phosphatidylethanolamine
- PG:
-
Phosphatidylglycerol
- PI:
-
Phosphatidylinositol
- GL:
-
Glycolipid
- GY:
-
Glucose–yeast extract medium
- JCM:
-
Japan collection of microorganisms
- SSC:
-
Saline-sodium citrate
- UPL:
-
Unknown phosphoglycolipid
- PIM:
-
Phosphatidylinositol mannosides
- UL:
-
Unidentified lipid
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Acknowledgements
We thank Prof. Aharon Oren for his valuable help with naming the species.
Funding
This work was supported in part by grants from the National Natural Science Foundation of China (No. 31700067), the China Postdoctoral Science Foundation (2015M580255), the Heilongjiang Provincial Postdoctoral Science Foundation (LBH-Z15016), and the “Academic Backbone” Project of Northeast Agricultural University (19XG18).
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Xiujun Sun and Shiwen Qiu performed the laboratory experiments, analysed the data, and drafted the manuscript. Xianxian Luo contributed to the biochemical characterization. Pinjiao Jin contributed to the polyphasic taxonomy. Junwei Zhao contributed to the fatty acids determination. Xianyao Wu and Jize Yang contributed to the morphological analyses. Xiangjing Wang participated to the discussions of experiments and revised the manuscript. Jia Song and Wensheng Xiang designed the experiments and revised the manuscript.
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Sun, X., Qiu, S., Luo, X. et al. Micromonospora rubida sp. nov., a novel actinobacterium isolated from soil of Harbin. Antonie van Leeuwenhoek 114, 697–708 (2021). https://doi.org/10.1007/s10482-021-01550-6
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DOI: https://doi.org/10.1007/s10482-021-01550-6