The genome of the square archaeon <it<Haloquadratum walsbyi</it< : life at the limits of water activity

<p<Abstract</p< <p<Background</p< <p<The square halophilic archaeon <it<Haloquadratum walsbyi </it<dominates NaCl-saturated and MgCl<sub<2 </sub<enriched aquatic ecosystems, which imposes a serious desiccation stress, caused by the extremely low...
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Autor*in:	Rodriguez-Valera Francisco [verfasserIn] Rampp Markus [verfasserIn] Falb Michaela [verfasserIn] Wende Andy [verfasserIn] Palm Peter [verfasserIn] Bolhuis Henk [verfasserIn] Pfeiffer Friedhelm [verfasserIn] Oesterhelt Dieter [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2006

Übergeordnetes Werk:	In: BMC Genomics - BMC, 2003, 7(2006), 1, p 169
Übergeordnetes Werk:	volume:7 ; year:2006 ; number:1, p 169

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1186/1471-2164-7-169

Katalog-ID:	DOAJ039564983

Internformat


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allfields	10.1186/1471-2164-7-169 doi (DE-627)DOAJ039564983 (DE-599)DOAJdf83e61f653a4be39d8f2d925b63d6bc DE-627 ger DE-627 rakwb eng TP248.13-248.65 QH426-470 Rodriguez-Valera Francisco verfasserin aut The genome of the square archaeon <it<Haloquadratum walsbyi</it< : life at the limits of water activity 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<Abstract</p< <p<Background</p< <p<The square halophilic archaeon <it<Haloquadratum walsbyi </it<dominates NaCl-saturated and MgCl<sub<2 </sub<enriched aquatic ecosystems, which imposes a serious desiccation stress, caused by the extremely low water activity. The genome sequence was analyzed and physiological and physical experiments were carried out in order to reveal how <it<H. walsbyi </it<has specialized into its narrow and hostile ecological niche and found ways to cope with the desiccation stress.</p< <p<Results</p< <p<A rich repertoire of proteins involved in phosphate metabolism, phototrophic growth and extracellular protective polymers, including the largest archaeal protein (9159 amino acids), a homolog to eukaryotic mucins, are amongst the most outstanding features. A relatively low GC content (47.9%), 15–20% less than in other halophilic archaea, and one of the lowest coding densities (76.5%) known for prokaryotes might be an indication for the specialization in its unique environment</p< <p<Conclusion</p< <p<Although no direct genetic indication was found that can explain how this peculiar organism retains its square shape, the genome revealed several unique adaptive traits that allow this organism to thrive in its specific and extreme niche.</p< Biotechnology Genetics Rampp Markus verfasserin aut Falb Michaela verfasserin aut Wende Andy verfasserin aut Palm Peter verfasserin aut Bolhuis Henk verfasserin aut Pfeiffer Friedhelm verfasserin aut Oesterhelt Dieter verfasserin aut In BMC Genomics BMC, 2003 7(2006), 1, p 169 (DE-627)326644954 (DE-600)2041499-7 14712164 nnns volume:7 year:2006 number:1, p 169 https://doi.org/10.1186/1471-2164-7-169 kostenfrei https://doaj.org/article/df83e61f653a4be39d8f2d925b63d6bc kostenfrei http://www.biomedcentral.com/1471-2164/7/169 kostenfrei https://doaj.org/toc/1471-2164 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2006 1, p 169
spelling	10.1186/1471-2164-7-169 doi (DE-627)DOAJ039564983 (DE-599)DOAJdf83e61f653a4be39d8f2d925b63d6bc DE-627 ger DE-627 rakwb eng TP248.13-248.65 QH426-470 Rodriguez-Valera Francisco verfasserin aut The genome of the square archaeon <it<Haloquadratum walsbyi</it< : life at the limits of water activity 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<Abstract</p< <p<Background</p< <p<The square halophilic archaeon <it<Haloquadratum walsbyi </it<dominates NaCl-saturated and MgCl<sub<2 </sub<enriched aquatic ecosystems, which imposes a serious desiccation stress, caused by the extremely low water activity. The genome sequence was analyzed and physiological and physical experiments were carried out in order to reveal how <it<H. walsbyi </it<has specialized into its narrow and hostile ecological niche and found ways to cope with the desiccation stress.</p< <p<Results</p< <p<A rich repertoire of proteins involved in phosphate metabolism, phototrophic growth and extracellular protective polymers, including the largest archaeal protein (9159 amino acids), a homolog to eukaryotic mucins, are amongst the most outstanding features. A relatively low GC content (47.9%), 15–20% less than in other halophilic archaea, and one of the lowest coding densities (76.5%) known for prokaryotes might be an indication for the specialization in its unique environment</p< <p<Conclusion</p< <p<Although no direct genetic indication was found that can explain how this peculiar organism retains its square shape, the genome revealed several unique adaptive traits that allow this organism to thrive in its specific and extreme niche.</p< Biotechnology Genetics Rampp Markus verfasserin aut Falb Michaela verfasserin aut Wende Andy verfasserin aut Palm Peter verfasserin aut Bolhuis Henk verfasserin aut Pfeiffer Friedhelm verfasserin aut Oesterhelt Dieter verfasserin aut In BMC Genomics BMC, 2003 7(2006), 1, p 169 (DE-627)326644954 (DE-600)2041499-7 14712164 nnns volume:7 year:2006 number:1, p 169 https://doi.org/10.1186/1471-2164-7-169 kostenfrei https://doaj.org/article/df83e61f653a4be39d8f2d925b63d6bc kostenfrei http://www.biomedcentral.com/1471-2164/7/169 kostenfrei https://doaj.org/toc/1471-2164 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2006 1, p 169
allfields_unstemmed	10.1186/1471-2164-7-169 doi (DE-627)DOAJ039564983 (DE-599)DOAJdf83e61f653a4be39d8f2d925b63d6bc DE-627 ger DE-627 rakwb eng TP248.13-248.65 QH426-470 Rodriguez-Valera Francisco verfasserin aut The genome of the square archaeon <it<Haloquadratum walsbyi</it< : life at the limits of water activity 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<Abstract</p< <p<Background</p< <p<The square halophilic archaeon <it<Haloquadratum walsbyi </it<dominates NaCl-saturated and MgCl<sub<2 </sub<enriched aquatic ecosystems, which imposes a serious desiccation stress, caused by the extremely low water activity. The genome sequence was analyzed and physiological and physical experiments were carried out in order to reveal how <it<H. walsbyi </it<has specialized into its narrow and hostile ecological niche and found ways to cope with the desiccation stress.</p< <p<Results</p< <p<A rich repertoire of proteins involved in phosphate metabolism, phototrophic growth and extracellular protective polymers, including the largest archaeal protein (9159 amino acids), a homolog to eukaryotic mucins, are amongst the most outstanding features. A relatively low GC content (47.9%), 15–20% less than in other halophilic archaea, and one of the lowest coding densities (76.5%) known for prokaryotes might be an indication for the specialization in its unique environment</p< <p<Conclusion</p< <p<Although no direct genetic indication was found that can explain how this peculiar organism retains its square shape, the genome revealed several unique adaptive traits that allow this organism to thrive in its specific and extreme niche.</p< Biotechnology Genetics Rampp Markus verfasserin aut Falb Michaela verfasserin aut Wende Andy verfasserin aut Palm Peter verfasserin aut Bolhuis Henk verfasserin aut Pfeiffer Friedhelm verfasserin aut Oesterhelt Dieter verfasserin aut In BMC Genomics BMC, 2003 7(2006), 1, p 169 (DE-627)326644954 (DE-600)2041499-7 14712164 nnns volume:7 year:2006 number:1, p 169 https://doi.org/10.1186/1471-2164-7-169 kostenfrei https://doaj.org/article/df83e61f653a4be39d8f2d925b63d6bc kostenfrei http://www.biomedcentral.com/1471-2164/7/169 kostenfrei https://doaj.org/toc/1471-2164 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2006 1, p 169
allfieldsGer	10.1186/1471-2164-7-169 doi (DE-627)DOAJ039564983 (DE-599)DOAJdf83e61f653a4be39d8f2d925b63d6bc DE-627 ger DE-627 rakwb eng TP248.13-248.65 QH426-470 Rodriguez-Valera Francisco verfasserin aut The genome of the square archaeon <it<Haloquadratum walsbyi</it< : life at the limits of water activity 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<Abstract</p< <p<Background</p< <p<The square halophilic archaeon <it<Haloquadratum walsbyi </it<dominates NaCl-saturated and MgCl<sub<2 </sub<enriched aquatic ecosystems, which imposes a serious desiccation stress, caused by the extremely low water activity. The genome sequence was analyzed and physiological and physical experiments were carried out in order to reveal how <it<H. walsbyi </it<has specialized into its narrow and hostile ecological niche and found ways to cope with the desiccation stress.</p< <p<Results</p< <p<A rich repertoire of proteins involved in phosphate metabolism, phototrophic growth and extracellular protective polymers, including the largest archaeal protein (9159 amino acids), a homolog to eukaryotic mucins, are amongst the most outstanding features. A relatively low GC content (47.9%), 15–20% less than in other halophilic archaea, and one of the lowest coding densities (76.5%) known for prokaryotes might be an indication for the specialization in its unique environment</p< <p<Conclusion</p< <p<Although no direct genetic indication was found that can explain how this peculiar organism retains its square shape, the genome revealed several unique adaptive traits that allow this organism to thrive in its specific and extreme niche.</p< Biotechnology Genetics Rampp Markus verfasserin aut Falb Michaela verfasserin aut Wende Andy verfasserin aut Palm Peter verfasserin aut Bolhuis Henk verfasserin aut Pfeiffer Friedhelm verfasserin aut Oesterhelt Dieter verfasserin aut In BMC Genomics BMC, 2003 7(2006), 1, p 169 (DE-627)326644954 (DE-600)2041499-7 14712164 nnns volume:7 year:2006 number:1, p 169 https://doi.org/10.1186/1471-2164-7-169 kostenfrei https://doaj.org/article/df83e61f653a4be39d8f2d925b63d6bc kostenfrei http://www.biomedcentral.com/1471-2164/7/169 kostenfrei https://doaj.org/toc/1471-2164 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2006 1, p 169
allfieldsSound	10.1186/1471-2164-7-169 doi (DE-627)DOAJ039564983 (DE-599)DOAJdf83e61f653a4be39d8f2d925b63d6bc DE-627 ger DE-627 rakwb eng TP248.13-248.65 QH426-470 Rodriguez-Valera Francisco verfasserin aut The genome of the square archaeon <it<Haloquadratum walsbyi</it< : life at the limits of water activity 2006 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier <p<Abstract</p< <p<Background</p< <p<The square halophilic archaeon <it<Haloquadratum walsbyi </it<dominates NaCl-saturated and MgCl<sub<2 </sub<enriched aquatic ecosystems, which imposes a serious desiccation stress, caused by the extremely low water activity. The genome sequence was analyzed and physiological and physical experiments were carried out in order to reveal how <it<H. walsbyi </it<has specialized into its narrow and hostile ecological niche and found ways to cope with the desiccation stress.</p< <p<Results</p< <p<A rich repertoire of proteins involved in phosphate metabolism, phototrophic growth and extracellular protective polymers, including the largest archaeal protein (9159 amino acids), a homolog to eukaryotic mucins, are amongst the most outstanding features. A relatively low GC content (47.9%), 15–20% less than in other halophilic archaea, and one of the lowest coding densities (76.5%) known for prokaryotes might be an indication for the specialization in its unique environment</p< <p<Conclusion</p< <p<Although no direct genetic indication was found that can explain how this peculiar organism retains its square shape, the genome revealed several unique adaptive traits that allow this organism to thrive in its specific and extreme niche.</p< Biotechnology Genetics Rampp Markus verfasserin aut Falb Michaela verfasserin aut Wende Andy verfasserin aut Palm Peter verfasserin aut Bolhuis Henk verfasserin aut Pfeiffer Friedhelm verfasserin aut Oesterhelt Dieter verfasserin aut In BMC Genomics BMC, 2003 7(2006), 1, p 169 (DE-627)326644954 (DE-600)2041499-7 14712164 nnns volume:7 year:2006 number:1, p 169 https://doi.org/10.1186/1471-2164-7-169 kostenfrei https://doaj.org/article/df83e61f653a4be39d8f2d925b63d6bc kostenfrei http://www.biomedcentral.com/1471-2164/7/169 kostenfrei https://doaj.org/toc/1471-2164 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ SSG-OLC-PHA GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2001 GBV_ILN_2003 GBV_ILN_2005 GBV_ILN_2006 GBV_ILN_2008 GBV_ILN_2009 GBV_ILN_2010 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2031 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2050 GBV_ILN_2055 GBV_ILN_2056 GBV_ILN_2057 GBV_ILN_2061 GBV_ILN_2111 GBV_ILN_2113 GBV_ILN_2190 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2006 1, p 169
language	English
source	In BMC Genomics 7(2006), 1, p 169 volume:7 year:2006 number:1, p 169
sourceStr	In BMC Genomics 7(2006), 1, p 169 volume:7 year:2006 number:1, p 169
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Biotechnology Genetics
isfreeaccess_bool	true
container_title	BMC Genomics
authorswithroles_txt_mv	Rodriguez-Valera Francisco @@aut@@ Rampp Markus @@aut@@ Falb Michaela @@aut@@ Wende Andy @@aut@@ Palm Peter @@aut@@ Bolhuis Henk @@aut@@ Pfeiffer Friedhelm @@aut@@ Oesterhelt Dieter @@aut@@
publishDateDaySort_date	2006-01-01T00:00:00Z
hierarchy_top_id	326644954
id	DOAJ039564983
language_de	englisch
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callnumber-first	T - Technology
author	Rodriguez-Valera Francisco
spellingShingle	Rodriguez-Valera Francisco misc TP248.13-248.65 misc QH426-470 misc Biotechnology misc Genetics The genome of the square archaeon <it<Haloquadratum walsbyi</it< : life at the limits of water activity
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topic_title	TP248.13-248.65 QH426-470 The genome of the square archaeon <it<Haloquadratum walsbyi</it< : life at the limits of water activity
topic	misc TP248.13-248.65 misc QH426-470 misc Biotechnology misc Genetics
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title	The genome of the square archaeon <it<Haloquadratum walsbyi</it< : life at the limits of water activity
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title_full	The genome of the square archaeon <it<Haloquadratum walsbyi</it< : life at the limits of water activity
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author_browse	Rodriguez-Valera Francisco Rampp Markus Falb Michaela Wende Andy Palm Peter Bolhuis Henk Pfeiffer Friedhelm Oesterhelt Dieter
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title_sort	genome of the square archaeon <it<haloquadratum walsbyi</it< : life at the limits of water activity
callnumber	TP248.13-248.65
title_auth	The genome of the square archaeon <it<Haloquadratum walsbyi</it< : life at the limits of water activity
abstract	<p<Abstract</p< <p<Background</p< <p<The square halophilic archaeon <it<Haloquadratum walsbyi </it<dominates NaCl-saturated and MgCl<sub<2 </sub<enriched aquatic ecosystems, which imposes a serious desiccation stress, caused by the extremely low water activity. The genome sequence was analyzed and physiological and physical experiments were carried out in order to reveal how <it<H. walsbyi </it<has specialized into its narrow and hostile ecological niche and found ways to cope with the desiccation stress.</p< <p<Results</p< <p<A rich repertoire of proteins involved in phosphate metabolism, phototrophic growth and extracellular protective polymers, including the largest archaeal protein (9159 amino acids), a homolog to eukaryotic mucins, are amongst the most outstanding features. A relatively low GC content (47.9%), 15–20% less than in other halophilic archaea, and one of the lowest coding densities (76.5%) known for prokaryotes might be an indication for the specialization in its unique environment</p< <p<Conclusion</p< <p<Although no direct genetic indication was found that can explain how this peculiar organism retains its square shape, the genome revealed several unique adaptive traits that allow this organism to thrive in its specific and extreme niche.</p<
abstractGer	<p<Abstract</p< <p<Background</p< <p<The square halophilic archaeon <it<Haloquadratum walsbyi </it<dominates NaCl-saturated and MgCl<sub<2 </sub<enriched aquatic ecosystems, which imposes a serious desiccation stress, caused by the extremely low water activity. The genome sequence was analyzed and physiological and physical experiments were carried out in order to reveal how <it<H. walsbyi </it<has specialized into its narrow and hostile ecological niche and found ways to cope with the desiccation stress.</p< <p<Results</p< <p<A rich repertoire of proteins involved in phosphate metabolism, phototrophic growth and extracellular protective polymers, including the largest archaeal protein (9159 amino acids), a homolog to eukaryotic mucins, are amongst the most outstanding features. A relatively low GC content (47.9%), 15–20% less than in other halophilic archaea, and one of the lowest coding densities (76.5%) known for prokaryotes might be an indication for the specialization in its unique environment</p< <p<Conclusion</p< <p<Although no direct genetic indication was found that can explain how this peculiar organism retains its square shape, the genome revealed several unique adaptive traits that allow this organism to thrive in its specific and extreme niche.</p<
abstract_unstemmed	<p<Abstract</p< <p<Background</p< <p<The square halophilic archaeon <it<Haloquadratum walsbyi </it<dominates NaCl-saturated and MgCl<sub<2 </sub<enriched aquatic ecosystems, which imposes a serious desiccation stress, caused by the extremely low water activity. The genome sequence was analyzed and physiological and physical experiments were carried out in order to reveal how <it<H. walsbyi </it<has specialized into its narrow and hostile ecological niche and found ways to cope with the desiccation stress.</p< <p<Results</p< <p<A rich repertoire of proteins involved in phosphate metabolism, phototrophic growth and extracellular protective polymers, including the largest archaeal protein (9159 amino acids), a homolog to eukaryotic mucins, are amongst the most outstanding features. A relatively low GC content (47.9%), 15–20% less than in other halophilic archaea, and one of the lowest coding densities (76.5%) known for prokaryotes might be an indication for the specialization in its unique environment</p< <p<Conclusion</p< <p<Although no direct genetic indication was found that can explain how this peculiar organism retains its square shape, the genome revealed several unique adaptive traits that allow this organism to thrive in its specific and extreme niche.</p<
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title_short	The genome of the square archaeon <it<Haloquadratum walsbyi</it< : life at the limits of water activity
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The genome of the square archaeon <it<Haloquadratum walsbyi</it< : life at the limits of water activity

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