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Genus nameWCHA1-57
SourceMiDAS
Alternative names"Candidatus Methanofastidiosa spp." [26943620] (future versions of the taxonomy will adopt this name)

Taxonomy

KingdomArchaea
OrderWCHA1-57
FamilyWCHA1-57
GenusWCHA1-57

16S gene copy number-
GenomesYes1

 In situOther
Filamentous
Hydrophobic cell surface


Methanogen
Fatty acids

POSNEGVariableNot assessed

Description

Genomes have recently been obtained for this previously uncharacterised genus which is now known as "Ca. Methanofastidiosa" 1. Genome analyses indicate a lack of potential for CO2 and nitrogen fixation. Acetate, propionate and malonate are suggested to be potential carbon sources for growth. All genomes lack genes for acetoclastic and C02-reducing methanogenesis and it is suggested that they are restricted to methylated thiol reduction for methane generation 1. Although MiDAS and SILVA include this in the class Thermoplasmata, Nobu et al., provide evidence that it should be placed into a novel class named Methanofastidiosa 1. This will be addressed in future MiDAS releases.

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Metabolism

 In situOther
Autotroph/Mixotroph1
AOB
NOB
Anammox
Aerobic Heterotroph
PAO
GAO
Nitrite Reduction
Sulphate Reduction
Fermentation
Acetogen
Methanogen1
Fatty Acids1
Sugars1
Proteins/Amino Acids

Abundance Information

 10 % percentileMedian90 % percentile
Influent000
Activated Sludge000
Digester-Mesophilic1.22.56.2
Digester-Thermophilic000

Predominant InAD - Mesophilic

References

[1] Nobu, Narihiro, Kuroda, Mei, Liu - Chasing the elusive Euryarchaeota class WSA2: genomes reveal a uniquely fastidious methyl-reducing methanogen. - ISME J 10(10): 2478-87. doi:10.1038/ismej.2016.33

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