{"refrec":{"BRefID":231048,"RR":"<b>Pfreundt, U.; Stal, L.J.; Voss, B.; Hess, W.R.</b> (2012). Dinitrogen fixation in a unicellular chlorophyll <i>d</i>-containing cyanobacterium. <i>ISME J. 6(7)</i>: 1367-1377. <a href=\"http://dx.doi.org/10.1038/ismej.2011.199\" target=\"_blank\">dx.doi.org/10.1038/ismej.2011.199</a>","BEntID":222760,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>ISME J. 6(7)</i>: 1367-1377. <a href=\"https://dx.doi.org/10.1038/ismej.2011.199\" target=\"_blank\">https://dx.doi.org/10.1038/ismej.2011.199</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Pfreundt, U.; Stal, L.J.; Voss, B.; Hess, W.R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Pfreundt, U. <i>et al.</i>","Englishabstract":"Marine cyanobacteria of the genus <i>Acaryochloris</i> are the only known organisms that use chlorophyll <i>d</i> as a photosynthetic pigment. However, based on chemical sediment analyses, chlorophyll <i>d</i> has been recognized to be widespread in oceanic and lacustrine environments. Therefore it is highly relevant to understand the genetic basis for different physiologies and possible niche adaptation in this genus. Here we show that unlike all other known isolates of <i>Acaryochloris</i>, the strain HICR111A, isolated from waters around Heron Island, Great Barrier Reef, possesses a unique genomic region containing all the genes for the structural and enzymatically active proteins of nitrogen fixation and cofactor biosynthesis. Their phylogenetic analysis suggests a close relation to nitrogen fixation genes from certain other marine cyanobacteria. We show that nitrogen fixation in <i>Acaryochloris</i> sp. HICR111A is regulated in a light–dark-dependent fashion. We conclude that nitrogen fixation, one of the most complex physiological traits known in bacteria, might be transferred among oceanic microbes by horizontal gene transfer more often than anticipated so far. Our data show that the two powerful processes of oxygenic photosynthesis and nitrogen fixation co-occur in one and the same cell also in this branch of marine microbes and characterize <i>Acaryochloris</i> as a physiologically versatile inhabitant of an ecological niche, which is primarily driven by the absorption of far-red light.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Dinitrogen fixation in a unicellular chlorophyll <i>d</i>-containing cyanobacterium","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Acaryochloris; chlorophyll d; cyanobacteria; dinitrogen fixation;microbial diversity; nitrogenase","OtherDescriptors":null,"Notes":null,"AnaPub":2012,"MonPub":null,"DateUpdate":"2016-09-22","DateCreate":"2013-12-01","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000305631100011","VABBcode":null,"OpenAcc":0,"DOI":"10.1038/ismej.2011.199"},"refs":null,"anarec":{"AnaID":231048,"PubliDate":2012,"Pagination":"1367-1377","XtraPublOfAnaID":null,"ISBN":null,"Volume":"6","Issue":"7","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":120798,"SerRR":"The ISME Journal: Multidisciplinary Journal of Microbial Ecology. 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