Halococcus hamelinensis

{{Short description|Species of archaea}}

{{Speciesbox

| taxon = Halococcus hamelinensis

| authority = Goh et al. 2006{{cite web | url=https://lpsn.dsmz.de/species/halococcus-hamelinensis | title=LPSN - List of Prokaryotic names with Standing in Nomenclature | publisher=Deutsche Sammlung von Mikroorganismen und Zellkulturen | access-date=2022-07-12}}

| synonyms = {{Species list

|Halococcus hamelinii|(not validly published){{cite conference | url = https://www.jstage.jst.go.jp/article/isea/2005/0/2005_0_203/_pdf/-char/en | title = Osmoadaptation of microorganisms from stromatolites | last1 = Goh | first1 = Falicia | last2 = Young | first2 = Jaeo Jeon | last3 = Barrow | first3 = Kevin | last4 = Neilan | first4 = Brett A. | last5 = Burns | first5 = Brendan P. | date = 2005

| book-title = International Symposium on Extremophiles and Their Applications | pages = 203–207}}

}}

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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.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 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.