Scientific classification

Patt et al. 1976
Type species
Methylobacterium organophilum

M. adhaesivum
M. aerolatum
M. aminovorans
M. aquaticum
M. brachiatum
M. brachythecii
M. bullatum
M. cerastii
M. dankookense
M. extorquens
M. frigidaeris[1]
M. fujisawaense
M. gnaphalii
M. goesingense
M. gossipiicola
M. gregans
M. haplocladii
M. hispanicum
M. iners
M. isbiliense
M. jeotgali
M. komagatae
M. longum
M. marchantiae
M. mesophilicum
M. nodulans
M. organophilum
M. oryzae
M. oxalidis
M. persicinum
M. phyllosphaerae
M. phyllostachyos[2]
M. platani
M. podarium
M. populi
M. pseudosasae [1]
M. pseudosasicola[2]
M. radiotolerans
M. rhodesianum
M. rhodinum
M. salsuginis
M. soli
M. suomiense
M. tardum
M. tarhaniae
M. thiocyanatum
M. thuringiense
M. trifolii
M. variabile
M. zatmanii

Methylobacteria is a genus of Rhizobiales.[3]

As well as its normal habitats in soil and water, Methylobacterium has also been identified as a contaminant of DNA extraction kit reagents, which may lead to its erroneous appearance in microbiota or metagenomic datasets.[4] In March 2021, a related new unknown species, tentatively named Methylobacterium ajmalii, associated with three new strains, designated IF7SW-B2T, IIF1SW-B5, and IIF4SW-B5, were reported to have been discovered, for the first time, on the International Space Station.[5][6]

Natural genetic transformation

Natural genetic transformation in bacteria is a process involving transfer of DNA from one cell to another through the intervening medium, and the integration of the donor sequence into the recipient genome by homologous recombination. Methylobacterium organophilum cells are able to undergo genetic transformation and become competent for DNA uptake near the end of the exponential growth phase.[7]


  1. ^ a b Parte, A.C. "Methylobacterium". LPSN.
  2. ^ a b Madhaiyan, M; Poonguzhali, S (July 2014). "Methylobacterium pseudosasicola sp. nov. and Methylobacterium phyllostachyos sp. nov., isolated from bamboo leaf surfaces". International Journal of Systematic and Evolutionary Microbiology. 64 (Pt 7): 2376–84. doi:10.1099/ijs.0.057232-0. PMID 24760798.
  3. ^ Garrity, George M.; Brenner, Don J.; Krieg, Noel R.; Staley, James T. (eds.) (2005). Bergey's Manual of Systematic Bacteriology, Volume Two: The Proteobacteria, Part C: The Alpha-, Beta-, Delta-, and Epsilonproteobacteria. New York, New York: Springer. ISBN 978-0-387-24145-6.
  4. ^ Salter, S; Cox, M; Turek, E; Calus, S; Cookson, W; Moffatt, M; Turner, P; Parkhill, J; Loman, N; Walker, A (2014). "Reagent contamination can critically impact sequence-based microbiome analyses". bioRxiv 10.1101/007187.
  5. ^ Bowler, Jacinta (16 March 2021). "Microbes Unknown to Science Discovered on The International Space Station". ScienceAlert. Retrieved 16 March 2021. CS1 maint: discouraged parameter (link)
  6. ^ Rogers, Adam (April 5, 2021). "Sneaky New Bacteria on the ISS Could Build a Future on Mars". Wired. One species, found on a HEPA filter in the station’s life-support system, was a garden-variety (literally!) Methylobacterium rhodesianum. But three samples—from a surface near the materials research rack, a wall near the “cupola” of windows, and the astronauts' dining table—were something new.
  7. ^ O'Connor M, Wopat A, Hanson RS (1977). "Genetic transformation in Methylobacterium organophilum". J. Gen. Microbiol. 98 (1): 265–72. doi:10.1099/00221287-98-1-265. PMID 401866.