Bacillota

The Bacillota (synonym Firmicutes) are a phylum of bacteria, most of which have gram-positive cell wall structure. The renaming of phyla such as Firmicutes in 2021 remains controversial among microbiologists, many of whom continue to use the earlier names of long standing in the literature. The name "Firmicutes" was derived from the Latin words for "tough skin," referring to the thick cell wall typical of bacteria in this phylum. Scientists once classified the Firmicutes to include all gram-positive bacteria, but have recently defined them to be of a core group of related forms called the low-G+C group, in contrast to the Actinomycetota. They have round cells, called cocci (singular coccus), or rod-like forms (bacillus). A few Firmicutes, such as Megasphaera, Pectinatus, Selenomonas and Zymophilus, have a porous pseudo-outer membrane that causes them to stain gram-negative. Many Bacillota (Firmicutes) produce endospores, which are resistant to desiccation and can survive extreme conditions. They are found in various environments, and the group includes some notable pathogens. Those in one family, the heliobacteria, produce energy through anoxygenic photosynthesis. Bacillota play an important role in beer, wine, and cider spoilage. The group is typically divided into the Clostridia, which are anaerobic, and the Bacilli, which are obligate or facultative aerobes. On phylogenetic trees, the first two groups show up as paraphyletic or polyphyletic, as do their main genera, Clostridium and Bacillus. However, Bacillota as a whole is generally believed to be monophyletic, or paraphyletic with the exclusion of Mollicutes. The currently accepted taxonomy based on the List of Prokaryotic names with Standing in Nomenclature (LPSN) and the National Center for Biotechnology Information (NCBI). More than 274 genera were considered to be within the Bacillota phylum, notable genera of Bacillota include: Bacilli, order Bacillales Bacillus Listeria Staphylococcus Bacilli, order Lactobacillales Enterococcus Lactobacillus Leuconostoc Streptococcus Clostridia Clostridioides Clostridium Selenomonas Erysipelotrichia Erysipelothrix Infectobesity Bacillota make up ~30% of the mouse and human gut microbiome.

Biostimulation as a sustainable solution for acid neutralization and uranium immobilization post acidic in-situ recovery

Rizlan Bernier-Latmani, Pierre Rossi, Thomas Coral

Major uranium (U) deposits worldwide are exploited by acid leaching, known as 'in-situ recovery' (ISR). ISR involves the injection of an acid fluid into ore-bearing aquifers and the pumping of the resulting metal-containing solution through cation exchange ...

2022

Energy efficiency and biological interactions define the core microbiome of deep oligotrophic groundwater

Rizlan Bernier-Latmani, Emma Bell

While oligotrophic deep groundwaters host active microbes attuned to the low-end of the bioenergetics spectrum, the ecological constraints on microbial niches in these ecosystems and their consequences for microbiome convergence are unknown. Here, we provi ...

NATURE RESEARCH2021

Biostimulation as a sustainable solution for acid neutralization and uranium immobilization post acidic in-situ recovery

Organohalide respiration in Firmicutes: energy metabolism and transcription regulation

Energy efficiency and biological interactions define the core microbiome of deep oligotrophic groundwater

Biostimulation as a sustainable solution for acid neutralization and uranium immobilization post acidic in-situ recovery

Energy efficiency and biological interactions define the core microbiome of deep oligotrophic groundwater

Organohalide respiration in Firmicutes: energy metabolism and transcription regulation