Species code:	ROSDO
Taxonomy:	Bacteria; Proteobacteria; Alphaproteobacteria; Rhodobacterales; Rhodobacteraceae; Roseobacter (TaxID: 375451) [NEWT/ NCBI]
Description:	Purple aerobic anoxygenic phototrophs (AAPs, also known as AAnPs or APBs) are photoheterotrophic organisms that although able to perform photosynthesis, are not able to survive by phototrophy, instead they depend on the respiration of organic compounds for growth. They do not produce oxygen. They also differ from classical purple phototrophic bacteria by their cessation of photosynthetic pigment synthesis upon illumination. Synthesis of the photosynthetic apparatus in aerobic phototrophic bacteria occurs aerobically in darkness, yet the photosystem produced in darkness synthesizes ATP and enhances growth when cells are illuminated. These bacteria may represent an intermediate evolutionary form between the purple phototrophic bacteria and chemotrophic relatives, or may have arisen from an aerobic chemotroph by lateral gene transfer of photosynthesis genes from a purple. Roseobacter denitrificans Och 114 is a marine bacterium that grows photoheterotrophically in the presence of oxygen and light but also anaerobically in the dark using nitrate or trimethylamine N-oxide as electron acceptors. It has a circular chromosome and 4 circular plasmids. The largest plasmid, pTB1, has significant similarity to the Ti plasmids from Agrobacterium, including DNA integration and transfer proteins, suggesting it might be able to transfer genes to other organisms. R.dentrificans lacks the Calvin cyle enzymes ribulose-bis-phosphate carboxylase (RuBisCO) and phosphoribulokinase, and so cannot fix carbon via this cycle. It may instead do so mixotrophically using several different pathways that are encoded in its genome. It is probably able to oxidize inorganic sulphur, and encodes many transport proteins for peptides and amino acids, sugar and carbohydrates, cations and iron.
Properties:	Presence of flagella: not known Interaction: No Number of membranes: 2 Number of inteins:0
Statistics:	Number of ROSDO entries in the UniProt Knowledgebase: 4118 (308 in UniProtKB/Swiss-Prot + 3810 in UniProtKB/TrEMBL)

Genome structure:	• Chromosome EMBL accession number CP000362 (circular; 4,133,097 bp) (download entry) (download Genome Reviews). • Plasmid pTB1 EMBL accession number CP000464 (circular; 106,469 bp) (download entry) (download Genome Reviews). • Plasmid pTB2 EMBL accession number CP000465 (circular; 69,269 bp) (download entry) (download Genome Reviews). • Plasmid pTB3 EMBL accession number CP000466 (circular; 16,575 bp) (download entry) (download Genome Reviews). • Plasmid pTB4 EMBL accession number CP000467 (circular; 5,824 bp) (download entry) (download Genome Reviews).
Reference(s):	[1] PubMed=17098896; [ NCBI , EBI , Israel , Japan ] Swingley W.D., Sadekar S., Mastrian S.D., Matthies H.J., Hao J., Ramos H., Acharya C.R., Conrad A.L., Taylor H.L., Dejesa L.C., Shah M.K., O'Huallachain M.E., Lince M.T., Blankenship R.E., Beatty J.T., Touchman J.W. ; "The complete genome sequence of Roseobacter denitrificans reveals a mixotrophic rather than photosynthetic metabolism."; J. Bacteriol. 189:683-690(2007).
Web links:	Official genome site(s): http://genomes.tgen.org/rhodobacter.html Other web sites: Entrez Genome Project: http://www.ncbi.nlm.nih.gov/sites/entrez?Db=genomeprj&Cmd=DetailsSearch&Term=txid375451%5Borgn%5D GIB (DDBJ): http://gib.genes.nig.ac.jp/single/index.php?spid=Rden_OCH114 PEDANT: http://pedant.gsf.de:3345/pedant3htmlview/pedant3view?Method=start_method&Db=p3_p10670_Rub_xylan  EBI Proteome Analysis page

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