Picrophilus torridus explained

Picrophilus torridus is a species of Archaea described in 1996.^[1] Picrophilus torridus was found in soil near a hot spring in Hokkaido, Japan. The pH of the soil was less than 0.5.^[2] P. torridus also has one of the smallest genomes found among organisms that are free-living and are non-parasitic and a high coding density, meaning that the majority of its genes are coding regions and provide instructions for building proteins. The current research suggests the two hostile conditions (high temperatures and low pH) favored by P. torridus have exerted selective pressure towards having a small and compact genome, which is less likely to be damaged by the harsh environment.^{[3] [4]}

Further reading

• Arora. Jasmine. Goswami. Kasturi. Saha. Swati. Characterization of the Replication Initiator Orc1/Cdc6 from the Archaeon Picrophilus torridus. Journal of Bacteriology. Jan 2014. 196. 2. 276–286. 10.1128/JB.01020-13. 24187082. 3911243.
• Frick. Eduard. Spatzal. Thomas. Gerhardt. Stefan. Andreas. Krämer. Oliver. Einsle. Wolfgang. Hüttel. Structural and functional characterization of 4-hydroxyphenylpyruvate dioxygenase from the thermoacidophilic archaeon Picrophilus torridus. Extremophiles. 13 April 2014. 18. 4. 641–651. 10.1007/s00792-014-0645-x. 24794033. 13898874. 1433-4909.
• Rajput. Rinky. Verma. Ved Vrat. Chaudhary. Vishal. Gupta. Rani. A hydrolytic gamma-glutamyl transpeptidase from thermo-acidophilic archaeon Picrophilus torridus: binding pocket mutagenesis and transpeptidation. Extremophiles. January 2013. 17. 1. 29–41. 10.1007/s00792-012-0490-8. 23104165. 17563963.
• Reher. Matthias. Fuhrer. Tobias. Bott. Michael. Schonheit. Peter. The Nonphosphorylative Entner-Doudoroff Pathway in the Thermoacidophilic Euryarchaeon Picrophilus torridus Involves a Novel 2-Keto-3-Deoxygluconate- Specific Aldolase. Journal of Bacteriology. 5 December 2009. 192. 23. 964–974. 10.1128/JB.01281-09. 20023024. 2812977.
• Thurmer. Andrea. Voigt. Birgit. Angelov. Angel. Albrecht. Dirk. Hecker. Michael. Liebl. Wolfgang. Proteomic analysis of the extremely thermoacidophilic archaeon Picrophilus torridus at pH and temperature values close to its growth limit. Proteomics. December 2011. 11. 23. 4559–4568. 10.1002/pmic.201000829. 22114103. 25035919.

External links

• Type strain of Picrophilus torridus at BacDive - the Bacterial Diversity Metadatabase

Notes and References

1. Schleper. Pühler. Klenk. Zillig. amp. July 1996. Picrophilus oshimae and Picrophilus tomdus fam. nov., gen. nov., sp. nov., Two Species of Hyperacidophilic, Thermophilic, Heterotrophic, Aerobic Archae. International Journal of Systematic Bacteriology. International Union of Microbiological Societies. 46. 3. 814–816. 1466-5034. 807119723. 10.1099/00207713-46-3-814. free.
2. Book: Protein Adaptation in Extremophiles. Siddiqui . Thomas. Nova Publishers. 2008. Thermoacidophiles and their Protein Adaptation to Low pH and High Temperature. 9781604560190. https://books.google.com/books?id=edKLDbKKZ1MC&q=%22Picrophilus+oshimae%22&pg=PA144. 31 October 2013.
3. Angelov. A.. Liebl. W.. 2006-10-20. Insights into extreme thermoacidophily based on genome analysis of Picrophilus torridus and other thermoacidophilic archaea. Journal of Biotechnology. Aspects of Prokaryotic Genome Research. en. 126. 1. 3–10. 10.1016/j.jbiotec.2006.02.017. 16621083. 0168-1656.
4. Schepers. B.. Thiemann. V.. Antranikian. G.. June 2006. Characterization of a Novel Glucoamylase from the Thermoacidophilic ArchaeonPicrophilus torridus Heterologously Expressed inE. coli. Engineering in Life Sciences. en. 6. 3. 311–317. 10.1002/elsc.200620131. 85128507. 1618-0240.