The Family Actinomycetaceae

Yassin, Atteyet-Alla Fetouh

doi:10.1007/978-3-642-30138-4_171

Cited by 7 publications

(4 citation statements)

References 553 publications

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“…In addition, C 18 : 2 ω6,9 c was variably detected in the strains in trace amounts (<1 % of total fatty acids). The overall patterns generated in this study agree with previously published data (Lawson, 2012) and with those generally observed for other members of the family Actinomycetaceae (Yassin, 2014).…”

supporting

confidence: 92%

Dissection of the genus Actinobaculum: Reclassification of Actinobaculum schaalii Lawson et al. 1997 and Actinobaculum urinale Hall et al. 2003 as Actinotignum schaalii gen. nov., comb. nov. and Actinotignum urinale comb. nov., description of Actinotignum sanguinis sp. nov. and emended descriptions of the genus Actinobaculum and Actinobaculum suis; and re-examination of the culture deposited as Actinobaculum massiliense CCUG 47753T ( = DSM 19118T), revealing that it does not represent a strain of this spec

Yassin

Spröer

Pukall

et al. 2015

International Journal of Systematic and Evolutionary Microbiology

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The remarkable host specificity of the species of the genus Actinobaculum led us to recharacterize these species by a polyphasic approach. A comparative chemotaxonomic study including analysis of whole-cell sugars, amino acid composition of the peptidoglycan, fatty acid methyl esters, respiratory quinones and polar lipids revealed significant differences that, in combination with molecular data, support a dissection of the genus Actinobaculum. The proposals of this study include the reclassification of Actinobaculum schaalii and Actinobaculum urinale as Actinotignum schaalii gen. nov., comb. nov. (type strain DSM 15541 T 5CCUG 27420 T) and Actinotignum urinale comb. nov. (type strain DSM 15805 T 5CCUG 46093 T), respectively. Emended descriptions of the genus Actinobaculum and Actinomyces suis are also provided. The results of 16S rRNA gene sequence analysis and DNA-DNA hybridization also indicated that the type strain of Actinobaculum massiliense deposited as CCUG 47753 T (5DSM 19118 T) should in fact be considered a member of the species Actinobaculum schaalii. In addition, comparative 16S rRNA gene sequencing and DNA-DNA relatedness studies of four strains recovered from clinical materials demonstrated that three of the isolates belonged to Actinotignum schaalii; the remaining strain represents a novel species, for which the name Actinotignum sanguinis sp. nov. is proposed. The type strain is IMMIB L-2199 T (5DSM 26039 T 5CCUG 64068 T). Abbreviation: DDH, DNA-DNA hybridization. The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain IMMIB L-2199 T is HG798952. Two supplementary tables and two supplementary figures are available with the online Supplementary Material.

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supporting

confidence: 92%

Dissection of the genus Actinobaculum: Reclassification of Actinobaculum schaalii Lawson et al. 1997 and Actinobaculum urinale Hall et al. 2003 as Actinotignum schaalii gen. nov., comb. nov. and Actinotignum urinale comb. nov., description of Actinotignum sanguinis sp. nov. and emended descriptions of the genus Actinobaculum and Actinobaculum suis; and re-examination of the culture deposited as Actinobaculum massiliense CCUG 47753T ( = DSM 19118T), revealing that it does not represent a strain of this spec

Yassin

Spröer

Pukall

et al. 2015

International Journal of Systematic and Evolutionary Microbiology

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“…Whether this association has any health relevance is uncertain. Members of the family Actinomycetaceae have a wide range of morphological and chemotaxonomic properties ( Yassin 2014 ). Some members were associated with human and animal infections ( Yassin 2014 ).…”

Section: Discussionmentioning

confidence: 99%

“…Members of the family Actinomycetaceae have a wide range of morphological and chemotaxonomic properties (Yassin 2014). Some members were associated with human and animal infections (Yassin 2014). A lower relative abundance of Actinomycetaceae has been linked to oral cancer and clinical depression (Börnigen et al 2017;Kelly et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Associations of Childhood and Perinatal Blood Metals with Children’s Gut Microbiomes in a Canadian Gestation Cohort

Shen

Laue

Shrubsole

et al. 2022

Environ Health Perspect

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Background: The gut microbiome is important in modulating health in childhood. Metal exposures affect multiple health outcomes, but their ability to modify bacterial communities in children is poorly understood. Objectives: We assessed the associations of childhood and perinatal blood metal levels with childhood gut microbiome diversity, structure, species, gene family-inferred species, and potential pathway alterations. Methods: We assessed the gut microbiome using 16S rRNA gene amplicon sequencing and shotgun metagenomic sequencing in stools collected from 6- to 7-year-old children participating in the GESTation and Environment (GESTE) cohort study. We assessed blood metal concentrations [cadmium (Cd), manganese (Mn), mercury (Hg), lead (Pb), selenium (Se)] at two time points, namely, perinatal exposures at delivery ( ) and childhood exposures at the 6- to 7-y follow-up ( ). We used multiple covariate-adjusted statistical models to determine microbiome associations with continuous blood metal levels, including linear regression (Shannon and Pielou alpha diversity indexes), permutational multivariate analysis of variance (adonis; beta diversity distance matrices), and multivariable association model (MaAsLin2; phylum, family, species, gene family-inferred species, and pathways). Results: Children’s blood Mn and Se significantly associated with microbiome phylum [e.g., Verrucomicrobiota ( , ; , , respectively)] and children’s blood Mn significantly associated with family [e.g., Eggerthellaceae ( , )]-level differences. Higher relative abundance of potential pathogens (e.g., Flavonifractor plautii ), beneficial species (e.g., Bifidobacterium longum , Faecalibacterium prausnitzii ), and both potentially pathogenic and beneficial species (e.g., Bacteriodes vulgatus , Eubacterium rectale ) inferred from gene families were associated with higher childhood or perinatal blood Cd, Hg, and Pb ( ). We found significant negative associations between childhood blood Pb and acetylene degradation pathway abundance ( ). Finally, neither perinatal nor childhood metal concentrations were associated with children’s gut microbial inter- and intrasubject diversity. Discussion: Our findings suggest both long- and short-term associations between metal exposure and the childhood gut microbiome, with stronger associations observed with more recent exposure. Future epidemiologic analyses may elucidate whether the observed changes in the microbiome relate to children’s health. https://doi.org/10.1289/EHP9674

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“…However, we were also unable to isolate some frequently occurring representatives of the family Lachnospiraceae , the genus Actinomyces (detected in all replicates of G1 and G2) and Candidatus RsaHf231 (detected in all replicates of G1). The family Lachnospiraceae and several members of the genus Actinomyces are fastidious anaerobic bacteria, which often require high levels of carbon dioxide and various supplements possibly not included in our media [ 68 , 69 , 70 ]. No members of Candidatus RsaHf231 have been cultivated thus far, so it would be challenging to select appropriate conditions in the absence of information about their physiology and growth requirements.…”

Section: Discussionmentioning

confidence: 99%

Culture-Independent and Culture-Dependent Characterization of the Black Soldier Fly Gut Microbiome Reveals a Large Proportion of Culturable Bacteria with Potential for Industrial Applications

et al. 2021

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Black soldier fly larvae (BSFL) are fast-growing, resilient insects that can break down a variety of organic substrates and convert them into valuable proteins and lipids for applications in the feed industry. Decomposition is mediated by an abundant and versatile gut microbiome, which has been studied for more than a decade. However, little is known about the phylogeny, properties and functions of bacterial isolates from the BSFL gut. We therefore characterized the BSFL gut microbiome in detail, evaluating bacterial diversity by culture-dependent methods and amplicon sequencing of the 16S rRNA gene. Redundant strains were identified by genomic fingerprinting and 105 non-redundant isolates were then tested for their ability to inhibit pathogens. We cultivated representatives of 26 genera, covering 47% of the families and 33% of the genera detected by amplicon sequencing. Among these isolates, we found several representatives of the most abundant genera: Morganella, Enterococcus, Proteus and Providencia. We also isolated diverse members of the less-abundant phylum Actinobacteria, and a novel genus of the order Clostridiales. We found that 15 of the isolates inhibited at least one of the tested pathogens, suggesting a role in helping to prevent colonization by pathogens in the gut. The resulting culture collection of unique BSFL gut bacteria provides a promising resource for multiple industrial applications.

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The Family Actinomycetaceae

Cited by 7 publications

References 553 publications

Associations of Childhood and Perinatal Blood Metals with Children’s Gut Microbiomes in a Canadian Gestation Cohort

Culture-Independent and Culture-Dependent Characterization of the Black Soldier Fly Gut Microbiome Reveals a Large Proportion of Culturable Bacteria with Potential for Industrial Applications

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