Niallia tiangongensis sp. nov., isolated from the China Space Station.

IF 2 3区 生物学 Q4 MICROBIOLOGY International journal of systematic and evolutionary microbiology Pub Date : 2025-03-01 DOI:10.1099/ijsem.0.006693
Junxia Yuan, Wende Zhang, Lei Dang, Yan Song, Zhao Yin, Ziwei He, Kanyan Xu, Pei Guo, Hong Yin
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引用次数: 0

Abstract

Understanding the characteristics of microbes during long-term space missions is essential for safeguarding the health of astronauts and maintaining the functionality of spacecraft. In this study, a Gram-positive, aerobic, spore-forming, rod-shaped strain JL1B1071T was isolated from the surface of hardware on the China Space Station. This strain belongs to the genus Niallia, with its closest relative being Niallia circulans ATCC 4513T. The genome of JL1B1071T is 5 166 230 bp in size, with a G+C content of 35.6 mol%. The average nucleotide identity and digital DNA-DNA hybridization values between JL1B1071T and N. circulans ATCC 4513T are 83.3 and 27.5%, respectively, both below the recommended thresholds for species delineation. The major cellular fatty acids were anteiso-C15:0 and iso-C15:0. The major quinone was menaquinone-7 (MK-7). Notably, strain JL1B1071T demonstrates a unique ability to hydrolyse gelatin, suggesting that it can utilize gelatin as a substrate in nutrient-limited environments. Genomic analysis of JL1B1071T revealed two conserved signature indels in the GAF domain-containing protein and DNA ligase D protein, which are specific to the genus Niallia. Additionally, structural and functional differences in proteins BshB1 and SplA were identified, which may enhance biofilm formation, oxidative stress response and radiation damage repair, thereby aiding its survival in the space environment. Based on phenotypic, physiological and chemotaxonomic characteristics, as well as genome annotation, strain JL1B1071T was considered a novel species within the genus Niallia and is proposed to be named Niallia tiangongensis sp. nov. The type strain is JL1B1071T (=GDMCC 1.4642=KCTC 43715).

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来源期刊
CiteScore
5.20
自引率
21.40%
发文量
426
审稿时长
1 months
期刊介绍: Published by the Microbiology Society and owned by the International Committee on Systematics of Prokaryotes (ICSP), a committee of the Bacteriology and Applied Microbiology Division of the International Union of Microbiological Societies, International Journal of Systematic and Evolutionary Microbiology is the leading forum for the publication of novel microbial taxa and the ICSP’s official journal of record for prokaryotic names. The journal welcomes high-quality research on all aspects of microbial evolution, phylogenetics and systematics, encouraging submissions on all prokaryotes, yeasts, microfungi, protozoa and microalgae across the full breadth of systematics including: Identification, characterisation and culture preservation Microbial evolution and biodiversity Molecular environmental work with strong taxonomic or evolutionary content Nomenclature Taxonomy and phylogenetics.
期刊最新文献
Notification that new names of prokaryotes, new combinations and new taxonomic opinions have appeared in volume 74, part 11 of the IJSEM. Ascoidea xinghuacunensis sp. nov., a novel ascomycetous yeast species from Xinghuacun Fenjiu old workshop, Shanxi province of China. Methanococcoides cohabitans sp. nov., a marine methylotrophic methanogen isolated from an anaerobic methane-oxidizing enrichment culture. Niallia tiangongensis sp. nov., isolated from the China Space Station. Christiangramia sediminicola sp. nov., a DNA-hydrolysing bacterium isolated from intertidal sediment.
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