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Methanococcus maripaludis
Methanococcus maripaludis
Image source: http://www.bact.wisc.edu/Bact303/Methanococcus.jpeg

Species
Methanococcus maripaludis

Kingdom
Archaea

Taxonomy
Archaea; Euryarchaeota; Methanococci; Methanococcales; Methanococcaceae; Methanococcus; Methanococcus maripaludis

Strains
S2

Gram Stain
Negative

Accession Numbers
S2:
NC_005791

Genome
S2:
Chromosome: 1,661,137 bp

Background
Methanococcus maripaludis (Latin "mare" meaning sea, "palus" meaning marsh) is a model species among the methanogenic Archaea. Originally characterized by W. J. Jones, the species was the predominent methanogen isolated from a salt-marsh sediment in South Carolina, United States. Numerous additional isolates were obtained by W. Whitman, including strain S2, also known as strain LL. M. maripaludis is strictly anaerobic, hydrogenotrophic (growing on hydrogen and carbon dioxide) and nitrogen-fixing, and is a mesophilic relative of the hyperthermophilic Methanococcus jannaschii. Cells are irregular cocci with weak motility. M. maripaludis is an excellent laboratory model because of rapid, reliable growth, a complete genome sequence, a robust set of genetic tools, and ongoing studies with expression arrays and proteomics.

Methanococcus maripaludis possesses a small, circular genome of 1.66 Mb in length with no extrachromosomal elements. The genome has a low, 33%, GC content. Open reading frame predictions indicate 1719 orfs. The maripaludis genome is relatively simple with few repeated sequences, though it contains three copies of the 16S and 23S ribosomal genes. Interestingly, while the genome of the closely related Methanocaldococcus jannaschii contains a number of inteins, maripaludis appears to lack inteins entirely, even in orfs that are otherwise highly homologous to their M. jannashii counterparts.

(From http://faculty.washington.edu/leighj/mm.html)


Sequenced By
S2:
University of Washington Genome Center.

Sequence Publications
Not Available


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