Methanosphaera
SuperSet Prokaryote, Archaea, Methanogens
Compare Methanogens subgroup 1: Methanobacterium ,Methanobrevibacter, Methanosphaera ,Metthanothermus

Methanogens Subgroup 2 : Methanococcus ,Methanocorpusculum , Methanoculleus , Methanogenium Methanolacinia paynteri, Methanomicrobium mobile , Methanoplanus , Methanospirillum hungatei

Methanogens subgroup 3: Methanococcoides methylutens , Methanohalobium evstigatus , Methanohalophilus , Methanolobus , Methanosarcina , Methanothrix

Contrast Eubacteria

Methanogens
Cell Wall-Less Archaeobacteria
Sulfate Reducing Archaeobacteria
Halophilic Archaeobacteria
Extremely Thermophilic Archaeobacteria
Subset  

 

Morphology Methanosphaera
CELLULAR  
Staining Gram positive
Morphology irregular cocci occur as single cells, in pairs, tetrads and clusters
Motility non motile
Specialized structures no endospores, cell walls contain psudomurein
Division  
COLONIAL  
Solid surface non pigmented
Liquid  

 

Growth Parameters Methanosphaera
PHYSIOLOGICAL  
Tropism  
Oxygen Very strictly anaerobic
pH optimum pH 6.5 -6.9
Temperature optimum 35-40oC
Requires requires acetate, carbon dioxide, isoleucine and thiamin as organic growth factors. H2 and methanol are required
Produces methanol is reduced to methanol with H2 as the electron donor Ammonia serve as the nitrogen source and sulfide or elemental sulfur as the sulfur source
Enzymes  
Unique features Cells do not contain muramic acid. Lipids are predominantly isoprenoid hydrocarbons ether-linked to glycerol. Cells contain coenzyme M and coenzyme F420
ENVIRONMENTAL  
Habitat gastrointestinal tracts
Lifestyle  
Pathogenicity  
Distribution  

 

Genome Methanosphaera
G+C Mol % 26
   

 

Reference Methanosphaera
First Citation Miller, T. L. and M. J. Wolin 1985a Methanosphaera stadmaniae. gen. nov. sp. nov,; a species that forms methane by reducing methanol with hydrogen. Arch Microbiol 141:116-122
Miller, T. L. and M. J. Wolin 1985b in Validation of the publication of new names and new combinations previously effectively published outside the IJSB. List 19 IJSB 35:535
The Prokaryotes p
Bergey's Systematic p 2214 T. L. Miller
Bergey's Determinative p 720-721
References