Ramazzottius

Ramazzottius is a genus of water bear or moss piglet, a tardigrade in the class Eutardigrada.

Ramazzottius
Light micrographs of Ramazzottius varieornatus in its active state (A) and the cryptobiotic tun state (B)[1]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Tardigrada
Class: Eutardigrada
Order: Parachela
Family: Hypsibiidae
Genus: Ramazzottius
Binda and Pilato, 1987
Species

see text

Ramazzottius varieornatus (see image) is a terrestrial invertebrate that is extroardinarily tolerant of extreme conditions such as irradiation, chemicals, dehydration and high pressure.[2] This tolerance is linked to the presence of the damage suppressor protein (Dsup) that binds to nucleosomes providing tolerance to DNA damage, such as that caused by ionizing radiation or hydroxyl radicals.[2][3]

Species
  • Ramazzottius affinis Bertolani, Guidetti and Rebecchi, 1993
  • Ramazzottius andreevi Biserov, 1998
  • Ramazzottius anomalus Ramazzotti, 1962)
  • Ramazzottius baumanni Ramazzotti, 1962)
  • Ramazzottius bunikowskae Kaczmarek, Michalczyk and Diduszko, 2006
  • Ramazzottius cataphractus Maucci, 1974)
  • Ramazzottius caucasicus Biserov, 1998
  • Ramazzottius edmondabouti Séméria, 1993
  • Ramazzottius horningi Binda and Pilato, 1995
  • Ramazzottius ljudmilae Biserov, 1998
  • Ramazzottius montivagus Dastych, 1983)
  • Ramazzottius novemcinctus Marcus, 1936)
  • Ramazzottius oberhaeuseri Doyère, 1840)
  • Ramazzottius rupeus Biserov, 1999
  • Ramazzottius saltensis Claps and Rossi, 1984)
  • Ramazzottius semisculptus Pilato and Rebecchi, 1992
  • Ramazzottius subanomalus Biserov, 1985)
  • Ramazzottius szeptycki Dastych, 1980)
  • Ramazzottius theroni Dastych, 1993
  • Ramazzottius thulini Pilato, 1970)
  • Ramazzottius tribulosus Bertolani and Rebecchi, 1988
  • Ramazzottius valaamis Biserov and Tumanov, 1993
  • Ramazzottius varieornatus Bertolani and Kinchin, 1993

References
  1. Neves, Ricardo Cardoso; Hvidepil, Lykke K. B.; Sørensen-Hygum, Thomas L.; Stuart, Robyn M.; Møbjerg, Nadja (9 January 2020). "Thermotolerance experiments on active and desiccated states of Ramazzottius varieornatus emphasize that tardigrades are sensitive to high temperatures". Scientific Reports. 10 (1): 94. Bibcode:2020NatSR..10...94N. doi:10.1038/s41598-019-56965-z. ISSN 2045-2322. PMC 6952461. PMID 31919388.
  2. Ricci C, Riolo G, Marzocchi C, Brunetti J, Pini A, Cantara S. The Tardigrade Damage Suppressor Protein Modulates Transcription Factor and DNA Repair Genes in Human Cells Treated with Hydroxyl Radicals and UV-C. Biology (Basel). 2021 Sep 27;10(10):970. doi: 10.3390/biology10100970. PMID: 34681069; PMCID: PMC8533384
  3. Chavez C, Cruz-Becerra G, Fei J, Kassavetis GA, Kadonaga JT. The tardigrade damage suppressor protein binds to nucleosomes and protects DNA from hydroxyl radicals. Elife. 2019 Oct 1;8:e47682. doi: 10.7554/eLife.47682. PMID: 31571581; PMCID: PMC6773438
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