Based on the molecular analysis of human subgingival plaque samples from 30 periodontitis patients a novel lineage of Archaea within the phylogenetic radiation of Thermoplasmatales was identified in 10% of cases. Co-occurrence of unique 16S rRNA gene and mcrA gene sequences suggests that this lineage corresponds to a hitherto unknown group of methanogens.
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http://dx.doi.org/10.1016/j.anaerobe.2012.04.006 | DOI Listing |
Nucleic Acids Res
January 2025
Division of Plant Science and Technology, University of Missouri, Columbia, MO 65211, United States.
G-quadruplex (G4) structure is a nucleic acid secondary structure formed by guanine-rich sequences, playing essential roles in various biological processes such as gene regulation and environmental stress adaptation. Although prokaryotes growing at high temperatures have higher GC contents, the pattern of G4 structure associated with GC content variation in thermal adaptation remains elusive. This study analyzed 681 bacterial genomes to explore the role of G4 structures in thermal adaptation.
View Article and Find Full Text PDFAppl Environ Microbiol
January 2025
Department of Microbiology, Ohio State University, Columbus, Ohio, USA.
Unlabelled: Many animals contain a species-rich and diverse gut microbiota that likely contributes to several host-supportive services that include diet processing and nutrient provisioning. Loss of microbiome taxa and their associated metabolic functions as result of perturbations may result in loss of microbiome-level services and reduction of metabolic capacity. If metabolic functions are shared by multiple taxa (i.
View Article and Find Full Text PDFMicrobiol Spectr
January 2025
Department of Veterinary Population Medicine, University of Minnesota, St. Paul, Minnesota, USA.
The goal of this study was to characterize the microbial profile of two different fresh pork cuts, bootjack (BJ) trim and tenderloin (TL), through a 16S rRNA sequencing workflow developed specifically for investigating low-biomass fresh meat within a commercial production schedule. Additionally, this study aimed to determine a baseline prevalence and enumeration profile across these two fresh pork cuts. Results showed that microbiome diversity was different between the BJ and TL, and also differed significantly by processing date.
View Article and Find Full Text PDFMicrobiol Resour Announc
January 2025
Department of Microbiology & Immunology, University of Michigan, Ann Arbor, Michigan, USA.
The clustur R package implements the clustering algorithms found in the mothur software package for assigning 16S rRNA gene sequences to operational taxonomic units (OTUs). Making these algorithms accessible through the R ecosystem will foster their further development, broader application, and integration within other R packages.
View Article and Find Full Text PDFJ Water Health
January 2025
Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto University Katsura, Nishikyo, Kyoto 615-8540, Japan.
The discharge of sewage effluent is a major source of microbial contamination in drinking water sources, necessitating a comprehensive investigation of its impact on pathogenic bacterial communities. This study utilized full-length 16S rRNA gene amplicon sequencing to identify putative pathogenic bacteria and analyze their community structures in drinking water sources subjected to different levels of fecal pollution: urban rivers with low, moderate, and high sewage effluent mixing ratios, and mountain streams with minimal human impact. The sewage effluent itself was also analyzed.
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