Valid publication of new names and new combinations effectively published outside the IJSEM

Oren, Aharon

doi:10.1099/ijsem.0.005096

“…Except Hazarika et al ( 2022) [18], remaining studies reported presence of 3 bacterial phyla Bacteroidetes (generally known by its more popular synonym Bacteroidota), Firmicutes, and Bacillota. However, Bacillota is presently considered to be a synonym of Firmicutes [20]. So, only 2 phyla (Bacteroidota and Bacillota) were found across all the studied populations.…”

Section: Analysis and Resultsmentioning

confidence: 93%

A review on human gut microbial diversity in 21 tribal populations from India

Chakraborty,

Mollick,

Roy

2023

Preprint

0

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From the earlier to modern times, the human populations passed through stages of subsistence such as foraging, rural farming and industrialized urban life. Till date various tribal people are living in geographically isolated areas depending on their traditional (gathering/rural farming) food sources. The long term cultural practices and food habits shaped the gut microbiome composition in these populations and contributed to health. However, the population-level study of the gut microbiota in Indian tribes with representative sampling across its geography and subsistence are limited. So, it is important to understand the complexity and diversity of the gut microbiome in healthy tribal populations, studied so far, to explore relationship among food, gut microbiome and health. Here, we reviewed gut microbiome studies which included 21 Indian tribal populations from different geographical regions to understand the role of food, ecology and cultural habits on variation of gut microbiota.

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“…[2]. This genus currently consists of five species with validly published names: Ruania albidiflava [1], Ruania alba [2, 3], Ruania zhangjianzhongii [4], Ruania rhizosphaerae [5] and Ruania alkalisoli [6, 7]. In addition, a candidatus ‘ Ruania gallistercoris ’ was detected in a chicken guts microbiome [8].…”

Section: Introductionmentioning

confidence: 99%

Ruania suaedae sp. nov. and Ruania halotolerans sp. nov., two actinobacteria isolated from saline soil, and reclassification of Haloactinobacterium kanbiaonis as Occultella kanbiaonis comb. nov.

Xu

¹

,

Shang

²

,

Tian

³

et al. 2022

International Journal of Systematic and Evolutionary Microbiology

12

0

1

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Two Gram-stain-positive, non-motile, strictly aerobic, yellow-coloured, rod-shaped bacterial strains, designated LR1S40T and M4N3S171T, were isolated from rhizosphere and bulk saline soil of Suaeda salsa collected in Inner Mongolia, China. Phylogenetic trees based on 16S rRNA gene and whole genome sequences showed that the two strains clustered tightly with strains of the genus Ruania . Strains LR1S40T and M4N3S171T had 95.5% 16S rRNA gene similarity to each other, and strain LR1S40T had 98.8, 98.7, 97.4 and <97.0% similarity to Ruania alkalisoli RN3S43T, Ruania rhizosphaerae LNNU 22110T, Ruania alba YIM 93306T and all other current type strains, while strain M4N3S171T had 98.6 and <97.0% similarity to R. alba YIM 93306T, and all other current type strains, respectively. The average nucleotide identity based on blast (ANIb) and digital DNA–DNA hybridization (dDDH) values of LR1S40T and M4N3S171T with each other and to the other type strains of Ruania were well below the threshold values (95% for ANIb, 70% for dDDH) for differentiating a species. Diphosphatidylglycerol and phosphatidylglycerol were the major polar lipids in both strains. The predominant menaquinone in both strains was both MK-8. The genome of strain LR1S40T consisted of a 3557440 bp circular chromosome, with a G+C content of 71.1 mol%, while the genome of strain M4N3S171T consisted of 4270413 bp, with a G+C content of 67.6 mol%. The phylogenetic, physiological and phenotypic characteristics allowed discrimination of the two strains from their relatives. The names Ruania suaedae sp. nov. [type strain LR1S40T (=CGMCC 1.19028T=KCTC 49726T)] and Ruania halotolerans sp. nov. [type strain M4N3S171T (=CGMCC 1. 19142T=KCTC 49727T)] are therefore proposed. During the publication of Haloactinobacterium kanbiaonis , Haloactinobacterium glacieicola (type strain T3246-1T), which was selected as the reference strain for the identification of H. kanbiaonis , was reclassified as Occultella glacieicola . The two phylogenetic trees showed that H. kanbiaonis HY164T tightly clustered with Occultella aeris F300T, and had the highest 16S rRNA gene similarity (99.8%) to O. aeris F300T. Based on the phylogenetic analysis and the publication record, Haloactinobacterium kanbiaonis should be reclassified as Occultella kanbiaonis comb. nov.

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“…Bacteria in the genus Faecalibacterium (phylum Bacillota 1 , class Clostridia, family Oscillospiraceae ) are commensal, strictly anaerobic bacteria, that are ubiquitous and abundant in the gastrointestinal tracts of humans and animals 2 , 3 . This genus is currently recognized as one of the most important commensals for human health 4 , 5 .…”

Section: Introductionmentioning

confidence: 99%

Faecalibacterium duncaniae A2-165 regulates the expression of butyrate synthesis, ferrous iron uptake, and stress-response genes based on acetate consumption

Verstraeten,

Layec,

Auger

et al. 2024

Sci Rep

3

0

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The promising next-generation probiotic Faecalibacterium prausnitzii is one of the most abundant acetate-consuming, butyrate-producing bacteria in the healthy human gut. Yet, little is known about how acetate availability affects this bacterium’s gene expression strategies. Here, we investigated the effect of acetate on temporal changes in the transcriptome of F. duncaniae A2-165 cultures using RNA sequencing. We compared gene expression patterns between two growth phases (early stationary vs. late exponential) and two acetate levels (low: 3 mM vs. high: 23 mM). Only in low-acetate conditions, a general stress response was activated. In high-acetate conditions, there was greater expression of genes related to butyrate synthesis and to the importation of B vitamins and iron. Specifically, expression was strongly activated in the case of the feoAABC operon, which encodes a FeoB ferrous iron transporter, but not in the case of the feoAB gene, which encodes a second putative FeoAB transporter. Moreover, excess ferrous iron repressed feoB expression but not feoAB. Lastly, FeoB but not FeoAB peptides from strain A2-165 were found in abundance in a healthy human fecal metaproteome. In conclusion, we characterized two early-stationary transcriptomes based on acetate consumption and this work highlights the regulation of feoB expression in F. duncaniae A2-165.

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Valid publication of new names and new combinations effectively published outside the IJSEM

Cited by 377 publications

References 64 publications

A review on human gut microbial diversity in 21 tribal populations from India

A review on human gut microbial diversity in 21 tribal populations from India

Ruania suaedae sp. nov. and Ruania halotolerans sp. nov., two actinobacteria isolated from saline soil, and reclassification of Haloactinobacterium kanbiaonis as Occultella kanbiaonis comb. nov.

Faecalibacterium duncaniae A2-165 regulates the expression of butyrate synthesis, ferrous iron uptake, and stress-response genes based on acetate consumption

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