Siebers, Bettina and Zaparty, Melanie and Raddatz, Guenter and Tjaden, Britta and Albers, Sonja-Verena and Bell, Steve D and Blombach, Fabian and Kletzin, Arnulf and Kyrpides, Nikos C. and Lanz, Christa and Plagens, André and Rampp, Markus and Rosinus, Andrea and von Jan, Mathias and Makarova, Kira S. and Klenk, Hans-Peter and Schuster, Stephan C and Hensel, Reinhard
The complete genome sequence of Thermoproteus tenax: a physiologically versatile member of the Crenarchaeota.
PloS one 6 (10), e24222.
Here, we report on the complete genome sequence of the hyperthermophilic Crenarchaeum Thermoproteus tenax (strain Kra1, DSM 2078(T)) a type strain of the crenarchaeotal order Thermoproteales. Its circular 1.84-megabase genome harbors no extrachromosomal elements and 2,051 open reading frames are identified, covering 90.6% of the complete sequence, which represents a high coding density. Derived from the gene content, T. tenax is a representative member of the Crenarchaeota. The organism is strictly anaerobic and sulfur-dependent with optimal growth at 86°C and pH 5.6. One particular feature is the great metabolic versatility, which is not accompanied by a distinct increase of genome size or information density as compared to other Crenarchaeota. T. tenax is able to grow chemolithoautotrophically (CO₂/H₂) as well as chemoorganoheterotrophically in presence of various organic substrates. All pathways for synthesizing the 20 proteinogenic amino acids are present. In addition, two presumably complete gene sets for NADH:quinone oxidoreductase (complex I) were identified in the genome and there is evidence that either NADH or reduced ferredoxin might serve as electron donor. Beside the typical archaeal A₀A₁-ATP synthase, a membrane-bound pyrophosphatase is found, which might contribute to energy conservation. Surprisingly, all genes required for dissimilatory sulfate reduction are present, which is confirmed by growth experiments. Mentionable is furthermore, the presence of two proteins (ParA family ATPase, actin-like protein) that might be involved in cell division in Thermoproteales, where the ESCRT system is absent, and of genes involved in genetic competence (DprA, ComF) that is so far unique within Archaea.
|Date:||7 October 2011|
|Institutions:|| Biology, Preclinical Medicine > Institut für Biophysik und physikalische Biochemie|
|Subjects:||500 Science > 570 Life sciences|
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Deposited On:||12 Apr 2012 11:12|
|Last Modified:||12 Apr 2012 11:12|