In:
International Journal of Systematic and Evolutionary Microbiology, Microbiology Society, Vol. 71, No. 7 ( 2021-07-12)
Abstract:
Six novel strains (ZJ34 T , ZJ561, ZJ750 T , ZJ1629, zg-993 T and zg-987) isolated from faeces and respiratory tracts of Marmota himalayana from the Qinghai–Tibet Plateau of PR China were characterized comprehensively. The results of analyses of the 16S rRNA gene and genome sequences indicated that the six strains represent three novel species of the genus Actinomyces , and are closely related to Actinomyces urogenitalis DSM 15434 T (16S rRNA gene sequences similarities, 94.9–98.7 %), Actinomyces weissii CCUG 61299 T (95.6–96.6 %), Actinomyces bovis CCTCC AB2010168 T (95.7 %) and Actinomyces bowdenii DSM 15435 T (95.2–96.4 %), with values of digital DNA–DNA hybridization less than 30.1 % when compared with their closest relatives but higher than 70 % within each pair of novel strains (ZJ34 T /ZJ561, ZJ750 T /ZJ1629 and zg-993 T /zg-987). All the novel strains had C 18 : 1 ω 9 c and C 16 : 0 as the two most abundant major fatty acids. MK-9(H 4 ) or MK-8(H 4 ) was the sole or predominant respiratory quinone of strains ZJ34 T , ZJ750 T and zg-993 T and their polar lipid profiles differed, but all had diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol, and phosphatidyl inositol mannoside as major components. ZJ750 T shared identical peptidoglycan amino acid profile with ZJ34 T (alanine, glutamic acid, lysine and ornithine) and the same whole-cell sugar composition with zg-993 T (glucose, rhamnose and ribose). Strain zg-993 T contained alanine, aspartic acid, glutamic acid, glycine and lysine in the peptidoglycan, and the only sugar in ZJ34 T was ribose. The DNA G+C contents of the novel strains were within the range of 65.8–70.1 mol%. On the basis of the results from the aforementioned analyses, the six novel strains were classified as representing three novel species of genus Actinomyces , for which the names Actinomyces faecalis sp. nov. [type strain ZJ34 T (=GDMCC 1.1952 T =JCM 34355 T )] , Actinomyces respiraculi sp. nov. [type strain ZJ750 T (=GDMCC 1.1950 T =JCM 34356 T )] and Actinomyces trachealis sp. nov. [type strain zg-993 T (=GDMCC 1.1956 T =JCM 34357 T )] were proposed, respectively.
Type of Medium:
Online Resource
ISSN:
1466-5026
,
1466-5034
DOI:
10.1099/ijsem.0.004875
Language:
English
Publisher:
Microbiology Society
Publication Date:
2021
detail.hit.zdb_id:
215062-1
detail.hit.zdb_id:
2056611-6
SSG:
12
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