Methanocaldococcus sp. FS406-22
Names | Methanocaldococcus sp. FS406-22 |
---|---|
Accession numbers | NC_013887, NC_013888 |
Background | Methanocaldococcus sp. (strain FS406-22) is an anaerobic, piezophilic, diazotrophic, hyperthermophilic marine archaeon isolated from deep-sea hydrothermal vent fluid. It is able to reduce N2 to NH3 at up to 92 degrees Celsius, which is 28 degrees higher than the current upper temperature limit of biological nitrogen fixation. Methanocaldococcus sp. grows at temperature between 58 to 92 degrees Celsius with N2 as the sole source of nitrogen. Maximal growth occurred at 90 degrees Celsius, and no growth is detected at 55 and 95 degrees Celsius. It is also able to produce methane. The 16S ribosomal RNA genes of Methanocaldococcus sp. is 99% similar to that of non-nitrogen fixing Methanocaldococcus jannaschii DSM 2661. At its optimal growth temperature of 90 degrees Celsius, Methanocaldococcus sp. expresses nifHDK genes which encode the nitrogenase enzyme complex. This increase in the temperature limit of nitrogen fixation could reveal a broader range of conditions for life in the subseafloor biosphere and other nitrogen limited ecosystems than previously estimated. (Adapted from: 17170307). (HAMAP: METSF) |
Taxonomy | |
Kingdom: | Archaea |
Phylum: | Euryarchaeota |
Class: | Methanococci |
Order: | Methanococcales |
Family: | Methanocaldococcaceae |
Genus: | Methanocaldococcus |
Species: | FS406-22 |
Strain | FS406-22 |
Complete | Yes |
Sequencing centre | (02-FEB-2010) US DOE Joint Genome Institute, 2800 Mitchell Drive B310, Walnut Creek, CA 94598-1698, USA (21-FEB-2010) National Center for Biotechnology Information, NIH, Bethesda, MD 20894, USA |
Sequencing quality | Level 6: Finished |
Sequencing depth | NA |
Sequencing method | NA |
Isolation site | Deep-sea hydrothermal vent from Pacific Ocean Axial volcano on the Juan de Fuca Ridge |
Isolation country | NA |
Number of replicons | 2 |
Gram staining properties | NA |
Shape | Cocci |
Mobility | No |
Flagellar presence | Yes |
Number of membranes | 1 |
Oxygen requirements | Anaerobic |
Optimal temperature | 90.0 |
Temperature range | Hyperthermophilic |
Habitat | Specialized |
Biotic relationship | Free living |
Host name | NA |
Cell arrangement | NA |
Sporulation | Nonsporulating |
Metabolism | Methanogen Nitrogen fixation |
Energy source | Lithotroph |
Diseases | NA |
Pathogenicity | No |
Citrate cycle (TCA cycle)
Purine metabolism
Pyrimidine metabolism
Valine, leucine and isoleucine biosynthesis
Lysine biosynthesis
Histidine metabolism
Phenylalanine, tyrosine and tryptophan biosynthesis
Selenocompound metabolism
C5-Branched dibasic acid metabolism
Methane metabolism
Riboflavin metabolism
Pantothenate and CoA biosynthesis
Biotin metabolism
Porphyrin and chlorophyll metabolism
Aminoacyl-tRNA biosynthesis
Purine metabolism
Pyrimidine metabolism
Valine, leucine and isoleucine biosynthesis
Lysine biosynthesis
Histidine metabolism
Phenylalanine, tyrosine and tryptophan biosynthesis
Selenocompound metabolism
C5-Branched dibasic acid metabolism
Methane metabolism
Riboflavin metabolism
Pantothenate and CoA biosynthesis
Biotin metabolism
Porphyrin and chlorophyll metabolism
Aminoacyl-tRNA biosynthesis