Table 1 Fermentation products and genome-predicted metabolic properties of semi-syntrophic anaerobes that benefit from interaction with methanogenic archaea.

From: Isolation of a member of the candidate phylum ‘Atribacteria’ reveals a unique cell membrane structure

Organism 1 2 3 4 5 6 7 8
Growth Temp. (˚C) 45 50 55 55 37 37 37 30
Substrate Glc Glc Glc Suc Glc Suc Frc Glc
Fermentation products
Hydrogen ++ ++ ++ ++ ++ ++ ++ ++
Acetate ++ ++ ++ ++ ++ ++ ++ ++
Ethanol +/− nd
Lactate ++ + ++ ++ ++ nd +
Succinate + ++ nd +/−
Formate + ++ ++ nd ++
Propionate + ++ nd
Pyruvate + nd
Fermentation pathways
Pyruvate:Fd oxidoreductase   
Pyruvate-formate lyase       
Lactate dehydrogenase     
Malate fermentation       
Succinate fermentation         
Methylmalonyl-CoA pathway         
Propanediol fermentation         
Alcohol dehydrogenase No genome available No genome available
H2/formate metabolism & energy conservation
NADH:Fd oxidoreductase (Rnf)        
Trimeric FeFe hydrogenase        
Tetrameric FeFe hydrogenase        
Hox NiFe hydrogenase         
Mbh NiFe hydrogenase       
Unknown NiFe hydrogenase         
FdhAB Formate dehydrogenase         
FdhA associated with HydBC         
FdhA Formate dehydrogenase         
  1. Organisms 1, RT761(this study); 2, Anaerolinea thermolimosa IMO-127; 3, Anaerolinea thermophila UNI-123; 4, Bellilinea caldifistulae GOMI-128; 5, Flexilinea flocculi TC129; 6, Longilinea arvoryzae KOME-128; 7, Syntrophococcus sucromutans S19525; 8, Bacillus stamsii BoGlc8326. Fermentation products: ++ = major fermentation product; + = minor fermentation product; +/− = product generated at very low concentrations or only detected under certain conditions; nd = not determine. Fermentation pathways and other genome-predicted features: = detected.
  2. nd not determine, Glc glucose, Suc sucrose, Frc fructose.