Corynebacterium flavescens

(aka Microbacterium flavum)

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

Overview

  • Corynebacterium flavescens, (aka Microbacterium flavum), is a Gram-variable, non-spore-forming, facultatively anaerobic, non-motile, pleiomorph rod-shaped bacterium. It has been detected in at least 2 gut microbiome compilation studies or metastudies. The DNA G+C content is 58.3%. Corynebacterium flavescens is probably a rare gut coloniser. (Barksdale1979; Bernard2012Bergey)



  • This organism has been recovered from cheese (CCUG). Has also been detected in human faeces (Bilen2018e). The risk classification (www.baua.de) for this organism is 1, i.e., low risk of infection and spread. Could be a possible pathogen in humans, but unknown at this stage. A possible gut commensal.
    • GENERAL CHARACTERISTICS (Barksdale1979); (Bernard2012Bergey);
    Character Response
  • 🧂
  • Salt tolerance:
  • tolerates 5% salt; doesn't tolerate 7.5% salt;
  • H+
  • Acid from carbohydrates usually produced:
  • fructose; galactose; glucose; mannose; mannitol;
  • ⥅
  • Substrates assimilated or utilised:
  • glutamate; glycine; isoleucine; leucine; methionine; proline; valine; 4-hydroxybenzoate; glutamine;
  • Active enzymes:
  • catalase;
    • SPECIAL FEATURES (Barksdale1979);
    Character Response
  • ✗
  • Metabolites not produced:
  • H₂S;
  • ✓
  • Methyl red test:
  • active
  • ✓
  • VP test:
  • active
  • ✗
  • NO3➔NO2:
  • not reduced
  • Pigments:
  • yellow

    • Details

    GENERAL
    Lineage Physiology General Growth Tolerances Hydrol./digest./degr.
    Phylum:  Actinobacteria Class:  Actinomycetia Order:  Corynebacteriales Family:  Corynebacteriaceae Genus:  Corynebacterium Alt. name:  Microbacterium flavum Gram stain:  vr O2 Relation.:  facultatively anaerobic Spore:  No spore Motility:  Sessile Morphology:  Pleiomorph rod Pigment:  yellow
    Health:  Unknown
    Source:  cheese (CCUG). Has also been detected in human faeces (Bilen2018e)
    DNA G+C(%):  58.3
    NaCl 3-5%:  5(+)
    NaCl >6%:  7.5(neg)
    		Urea:  neg Gelatin:  neg Starch:  neg Hippurate:  neg Milk:  neg Tween:  80(neg)
    CARBOHYDRATE ACID FORMATION
    Monosaccharide O/F Oligosaccharide O/F Polysaccharide O/F Polyol O/F Other O/F
    Arabinose:  neg Fructose:  + Galactose:  + Glucose:  + Mannose:  + Rhamnose:  neg Xylose:  neg Lactose:  neg Maltose:  neg Melibiose:  neg Sucrose:  neg Trehalose:  neg Inulin:  neg Starch:  neg Adonitol:  neg Dulcitol:  neg Glycerol:  neg Inositol:  neg Mannitol:  + Sorbitol:  neg Salicin:  neg
    SUBSTRATE ASSIMILATION & UTILISATION
    Monosaccharide util/assim Oligosaccharide util/assim Other carboh. util/assim Amino acid util/assim Organic acid util/assim
    Glucosamine:  neg Inositol:  neg β-Ala:  neg Glu:  + Gly:  + Ile:  + Leu:  + Met:  + Pro:  + Trp:  neg Val:  + 4-Hydroxybenzoate:  + Pimelate:  neg
    ENZYME ACTIVITY
    Enzymes: General Enzymes: Carbohydrate Enzymes: Protein Enzymes: Arylamidases Enzymes: Esters/fats
    Catalase:  + Urease:  neg LysDC:  neg OrnDC:  neg AlkalineP:  neg
    METABOLITES - PRODUCTION & USE
    Fuel Usable Metabolites Metabolites Released Special Products Compounds Produced

    		H2S:  neg Pigment:  yellow

    References

    SPECIFIC REFERENCES FOR CORYNEBACTERIUM FLAVESCENS
  • Nouioui2018 - Genome-Based Taxonomic Classification of the Phylum Actinobacteria.
  • Barksdale1979 - Biological and Chemical Basis for the Reclassification of Microbacterium flavum Orla-Jensen as Corynebacterium flavescens nom. nov.
  • Bernard2012Bergey - Bergey's manual of systematic bacteriology. Vol. 5, The Actinobacteria. Part A & B. Corynebacteriaceae, Genus I. Corynebacterium
  • ...............................
    • GUT MICROBIOME COMPILATIONS AND METASTUDIES FOR CORYNEBACTERIUM FLAVESCENS
  • Byrd2020 - Stability and dynamics of the human gut microbiome and its association with systemic immune traits.
  • Lagier2016 - Culture of previously uncultured members of the human gut microbiota by culturomics.
  • ...............................
    • GENERAL REFERENCES FOR CORYNEBACTERIUM FLAVESCENS
  • Bilen2018e - Description of the human gut microbiota by culturomics
    • Added: January 05, 2022