Methanolobus

Methanolobus

SuperSet	Prokaryote, Archaea, Methanogens Methanogens subgroup 3:
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	Methanogens Cell Wall-Less Archaeobacteria Sulfate Reducing Archaeobacteria Halophilic Archaeobacteria Extremely Thermophilic Archaeobacteria Eubacteria
Subset

Morphology

Methanolobus

CELLULAR

Staining	Gram-negative
Morphology	Irregular cocci, 0.8-1.25 um in diameter, sometimes forming loose aggregates Cells are surrounded by a protein subunit envelope covering the membrane
Motility	If flagellation present, monotrichous
Specialized structures

Division

COLONIAL

Solid surface

Liquid

Growth Parameters

Methanolobus

PHYSIOLOGICAL

Tropism	Chemo-organotrophic
Oxygen	Strictly anaerobic
pH
Temperature	Optimum temperature: 37`C; maximum: 40-45%C; minimum: 10-15`C.
Requirements	Growth occurs within a salt range of 0.3-7.5% with an optimum of about 3%. growis on methanol and methylamines
Products	No growth on H2-Co2, formate or acetate (Konig and Stetter, 1982). In the presence of molecular sulfur, H2S, in addition to methane and CO2, is formed from methanol (Stetter and Gaag 1983)
Enzymes
Unique features

ENVIRONMENTAL

Habitat
Lifestyle
Pathogenicity

Distribution

Genome

Methanolobus

G+C Mol %

38-42

Reference	Methanolobus
First citation	Konig,H. and K.O. Stetter. 1982. Isolation and characterization of Methanolobus tindarius, sp. nov., a coccoid methanogen growing only on methanol and methylamines. Zentralbl. Bakteriol. Mikrobiol. Hyg. 1 Abt. Orig C3:478-490
The Prokaryotes
Bergey's Systematatic	p 2205 K. O. Stetter
Bergey's Determinative	p 724
References