Mahella australiensis

Bacteria
General | Carbohydrate O/F | Substrate utilisation | Enzymes | Metabolites | Antibiotics

Overview

  • Mahella australiensis is a Gram-positive, spore-forming, strictly anaerobic, motile, rod-shaped bacterium. It has been detected in at least 2 gut microbiome compilation studies or metastudies. The DNA G+C content is 55.5%. Mahella australiensis is likely to be transient and not a long-term gut coloniser. (Salinas2004)



  • This organism has been recovered from an oil well, Australia. The risk classification (www.baua.de) for this organism is 1, i.e., low risk of infection and spread. Pathogenicity status unknown, or very unlikely to be pathogenic. Likely to be transient and not a long-term gut commensal.
    • QUIRKS
  • High optimum growth temperature so unlikely to be a gut coloniser.
    • GENERAL CHARACTERISTICS (Salinas2004);
    Character Response
  • 🧂
  • Salt tolerance:
  • tolerates 4% salt; Grows optimally with 0.1% salt.
  • pH
  • Acidity tolerance:
  • tolerates pH 5.5; tolerates pH 8.8; Grows optimally at pH 7.5.
  • 🌡
  • Temperature tolerance:
  • grows at 30℃; grows at 60℃; Grows optimally at 50℃.
  • H+
  • Acid from carbohydrates usually produced:
  • arabinose; fructose; galactose; glucose; mannose; xylose; cellubiose; sucrose;
  • ⥅
  • Substrates assimilated or utilised:
  • arabinose; pyruvate;
    • SPECIAL FEATURES (Salinas2004);
    Character Response
  • ✓
  • Metabolites produced:
  • formate; acetate; lactate; ethanol; COâ‚‚; Hâ‚‚;
  • ✗
  • Nitrate:
  • not reduced
  • ✗
  • Nitrite:
  • not reduced
  • ✗
  • Sulfate:
  • not reduced
  • ✗
  • Thiosulfate:
  • not reduced

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Firmicutes Class:  Clostridia Order:  Thermoanaerobacterales Family:  Thermoanaerobacterales Family IV. Incertae Sedis Genus:  Mahella Gram stain:  + O2 Relation.:  strictly anaerobic Spore:  Endospore Motility:  Swimming Morphology:  Rod
    Health:  Unknown
    Source:  an oil well, Australia
    DNA G+C(%):  55.5
    Opt. T:  50℃
    Lower T(℃):  30(+)
    High T(℃):  60(+)
    NaCl 3-5%:  4(+)
    Opt. pH:  7.5
    pH 4.2-5.9:  5.5(+)
    pH >8:  8.8(+)
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    Arabinose:  + Fructose:  + Galactose:  + Glucose:  + Mannose:  + Xylose:  + Cellubiose:  + Sucrose:  +
    SUBSTRATE ASSIMILATION & UTILISATION
    Monosaccharide util/assim Oligosaccharide util/assim Other carboh. util/assim Amino acid util/assim Organic acid util/assim
    Arabinose:  + Starch:  neg Pyruvate:  +

    References

    SPECIFIC REFERENCES FOR MAHELLA AUSTRALIENSIS
  • Salinas2004 - Mahella australiensis gen. nov., sp. nov., a moderately thermophilic anaerobic bacterium isolated from an Australian oil well.
  • ...............................
    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR MAHELLA AUSTRALIENSIS
  • New2022 - Collective effects of human genomic variation on microbiome function.
  • Qin2012 - Metagenome-wide association study of gut microbiota in type 2 diabetes
  • ...............................
    • Added: March 18, 2022