Thermofilum pendens Hrk 5

Names Thermofilum pendens Hrk 5
Accession numbers NC_008696, NC_008698
Background Thermofilum pendens (strain Hrk5) is a a sulfur-dependent, anaerobic heterotroph archaea. It forms long thin filaments and may have an unusual mode of reproduction in which spherical bulges form at one end of the cell. It is an extracellular commensal, requiring an extract of another crenarchaeota Thermoproteus tenax for growth, and the genome sequence reveals that biosynthetic pathways for purines, most amino acids, and most cofactors are absent. Besides the lack of biosynthesis, several nutrient transporters that are not found in any other crenarchaeote are present in T. pendens. It appears that T. pendens has adapted to life in an environment rich in nutrients and grows mainly by peptide fermentation. It was known previously to utilize peptides as an energy source, but the genome revealed a substantial ability to grow on carbohydrates. T. pendens may obtain energy from sulfur reduction with hydrogen and formate as electron donors. It may also be capable of sulfur-independent growth on formate with formate hydrogen lyase. (HAMAP: THEPD)
Strain Hrk 5
Complete Yes
Sequencing centre (14-DEC-2006) US DOE Joint Genome Institute, 2800 Mitchell Drive B100, Walnut Creek, CA 94598-1698, USA
(21-DEC-2006) National Center for Biotechnology Information, NIH, Bethesda, MD 20894, USA
Sequencing quality Level 6: Finished
Sequencing depth NA
Sequencing method Sanger
Isolation site Solfataric hot spring in Iceland
Isolation country Iceland
Number of replicons 2
Gram staining properties NA
Shape Bacilli
Mobility No
Flagellar presence No
Number of membranes 1
Oxygen requirements Anaerobic
Optimal temperature 88.0
Temperature range Hyperthermophilic
Habitat Specialized
Biotic relationship Free living
Host name NA
Cell arrangement NA
Sporulation Nonsporulating
Metabolism NA
Energy source NA
Diseases NA
Pathogenicity No