Species code:	IGNH4
Taxonomy:	Archaea; Crenarchaeota; Thermoprotei; Desulfurococcales; Desulfurococcaceae; Ignicoccus (TaxID: 453591) [NEWT/ NCBI]
Description:	A chemolithoautotrophic and hyperthermophilic archaeon, Ignicoccus hospitalis was isolated from a submarine hydrothermal system off the coast of Iceland. Optimal growth occurs at 90 degrees C utilizing molecular hydrogen, elemental sulfur, and carbon dioxide as the energy substrate, the electron acceptor, and the carbon source, respectively. It is the obligatory host of Nanoarchaeum equitans; up to a dozen N.equitans can be found on the surface of I.hospitalis without doing any apparent harm to the host. Ignicoccus species are unique among the Archaea in having two cell membranes; together with the cytoplasmic membrane, it encloses a huge periplasmic space, in which membrane-bound vesicles are found.
Properties:	Presence of flagella: Yes Interaction: Archaeal host for Naoarchaeum equitans Number of membranes: 2 Number of inteins:0
Statistics:	Number of IGNH4 entries in the UniProt Knowledgebase: 1434 (101 in UniProtKB/Swiss-Prot + 1333 in UniProtKB/TrEMBL)

Genome structure:	Chromosome EMBL accession number CP000816 (circular; 1,297,538 bp) (download entry) (download Genome Reviews).
Reference(s):	[1] Podar M., Anderson I., Ivanova N., Wall M., Mavrommatis K., Lykidis A., Chen J., Hudson M., Deciu C., Hutchison D., Eads J., Fernandes F., Tamang D., Szeto E., Land M., Lapidus A., Kyrpides N., Chang C., Saier M., Eisen J., Rachel R., Huber H., Keller M., Richardson P., Stetter K. ; "Unicellular symbiosis at high temperature: genomic insights into the Ignicoccus hospitalis - Naoarchaeum equitans relationship."; Submitted (AUG-2007) to the EMBL/GenBank/DDBJ databases.
Web links:	Entrez Genome Project: http://www.ncbi.nlm.nih.gov/sites/entrez?Db=genomeprj&cmd=ShowDetailView&TermToSearch=13914 GIB (DDBJ): http://gib.genes.nig.ac.jp/single/index.php?spid=Ihos_KIN4I  EBI Proteome Analysis page

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