PMID:10952301

Citation	Heidelberg, JF, Eisen, JA, Nelson, WC, Clayton, RA, Gwinn, ML, Dodson, RJ, Haft, DH, Hickey, EK, Peterson, JD, Umayam, L, Gill, SR, Nelson, KE, Read, TD, Tettelin, H, Richardson, D, Ermolaeva, MD, Vamathevan, J, Bass, S, Qin, H, Dragoi, I, Sellers, P, McDonald, L, Utterback, T, Fleishmann, RD, Nierman, WC, White, O, Salzberg, SL, Smith, HO, Colwell, RR, Mekalanos, JJ, Venter, JC and Fraser, CM (2000) DNA sequence of both chromosomes of the cholera pathogen Vibrio cholerae. Nature 406:477-83
Abstract	Here we determine the complete genomic sequence of the gram negative, gamma-Proteobacterium Vibrio cholerae El Tor N16961 to be 4,033,460 base pairs (bp). The genome consists of two circular chromosomes of 2,961,146 bp and 1,072,314 bp that together encode 3,885 open reading frames. The vast majority of recognizable genes for essential cell functions (such as DNA replication, transcription, translation and cell-wall biosynthesis) and pathogenicity (for example, toxins, surface antigens and adhesins) are located on the large chromosome. In contrast, the small chromosome contains a larger fraction (59%) of hypothetical genes compared with the large chromosome (42%), and also contains many more genes that appear to have origins other than the gamma-Proteobacteria. The small chromosome also carries a gene capture system (the integron island) and host 'addiction' genes that are typically found on plasmids; thus, the small chromosome may have originally been a megaplasmid that was captured by an ancestral Vibrio species. The V. cholerae genomic sequence provides a starting point for understanding how a free-living, environmental organism emerged to become a significant human bacterial pathogen.
Links	PubMed Online version:10.1038/35020000
Keywords	Base Sequence; Biological Transport; Cholera/microbiology; Chromosomes, Bacterial; DNA Repair; DNA, Bacterial; Energy Metabolism; Evolution, Molecular; Gene Expression Regulation, Bacterial; Genome, Bacterial; Humans; Molecular Sequence Data; Phylogeny; Sequence Analysis, DNA; Vibrio cholerae/classification; Vibrio cholerae/genetics; Vibrio cholerae/pathogenicity
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