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Halococcus hamelinensis is a halophilic archaeon isolated from the stromatolites in Australia. These living stromatolites are exposed to extreme conditions of salinity, desiccation and UV radiation. H. hamelinensis is able to survive high UVC radiation doses due to the presence of the bacteria-like nucleotide excision repair genes uvrA, uvrB and uvrC (that encode the UvrABC endonuclease) as well as the photolyase phr2 gene. The uvrA, uvrB and uvrC genes are upregulated upon UVC irradiation.

References

1. "LPSN - List of Prokaryotic names with Standing in Nomenclature". Deutsche Sammlung von Mikroorganismen und Zellkulturen. Retrieved 2022-07-12.
2. Goh, Falicia; Young, Jaeo Jeon; Barrow, Kevin; Neilan, Brett A.; Burns, Brendan P. (2005). "Osmoadaptation of microorganisms from stromatolites". International Symposium on Extremophiles and Their Applications. pp. 203–207.
3. ^ Leuko S, Neilan BA, Burns BP, Walter MR, Rothschild LJ. Molecular assessment of UVC radiation-induced DNA damage repair in the stromatolitic halophilic archaeon, Halococcus hamelinensis. J Photochem Photobiol B. 2011 Feb 7;102(2):140-5. doi: 10.1016/j.jphotobiol.2010.10.002. Epub 2010 Oct 23. PMID 21074452

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