Abstract
Two bacterial strains, designated 2DFWM-2T and FW10M-9T, were isolated from gut of larva of Protaetia brevitarsis seulensis grown at the National Institute of Agricultural Sciences, Wanju-gun, South Korea. 16S rRNA and rpoB gene sequences showed that strain 2DFWM-2T formed a separate branch with Lactococcus allomyrinae 1JSPR-7T in the genus Lactococcus, adjacent to a group of Lactococcus lactis subspecies. ANI and dDDH values between 2DFWM-2T and Lactococcus allomyrinae 1JSPR-7T were 93.30% and 53.20%, respectively. Based on the 16S rRNA gene sequence analysis, strain FW10M-9T was classified into the genus Xylanimonas revealing 96.9–98.5% sequence similarities with the Xylanimonas species. The ANI values of strain FW10M-9T with the closely species Xylanimonas pachnodae NBRC 107786T, Xylanimonas allomyrinae 2JSPR-7T, Isoptericola variabilis JCM 11754T and Xylanimonas cellulosilytica DSM 15894T was 81.5%, 81.2%, 81.0% and 84.1%, respectively, and the dDDH values estimated by GGDC was 24.3%, 24.3%, 29.3% and 28.1%, respectively. On the basis of the phenotypic and genotypic data, it is proposed that strain 2DFWM-2T represents a novel species of the genus Lactococcus, for which the name Lactococcus protaetiae sp. nov. is proposed, and the type strain is 2DFWM-2T (= KACC 19320T = NBRC 113069T). And, strain FW10M-9T represents a novel species of the genus Xylanimonas, for which the name Xylanimonas protaetiae sp. nov. is proposed, and the type strain is FW10M-9T (= KACC 19331T = NBRC 113053T).
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Abbreviations
- MRS agar:
-
De Man, Rogosa and Sharpe agar
- ANI:
-
Average nucleotide 16 identity
- dDDH:
-
Digital DNA-DNA hybridization
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Acknowledgements
We would like to thank professor Bernhard Schink for checking the species epithet.
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This study was carried out with the support (PJ013549) of National Institute of Agricultural Sciences, Rural Development Administration, Republic of Korea.
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J. Heo, S.J. Kim, and S.W. Kwon designed reseach: M.A. Kim provided the insect sample; T. Tamura, S. Saitou, and M. Hamada carried out the chemotaxonomic analysis: J.S. Kim and S.B. Hong participated experiments; Soon-Wo Kwon wrote the paper; all authors provided critical feedback and helped shape the research, analysis and manuscript.
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The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence and genome sequence of strain 2DFWM-2T and FW10M-9T are MN121516 and CP041356, and MK490978 and CP035493, respectively.
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Heo, J., Kim, SJ., Kim, M.A. et al. Lactococcus protaetiae sp. nov. and Xylanimonas protaetiae sp. nov., isolated from gut of larvae of Protaetia brevitarsis seulensis. Antonie van Leeuwenhoek 113, 1009–1021 (2020). https://doi.org/10.1007/s10482-020-01413-6
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DOI: https://doi.org/10.1007/s10482-020-01413-6