PMID:15477389

Citation	Janga, SC and Moreno-Hagelsieb, G (2004) Conservation of adjacency as evidence of paralogous operons. Nucleic Acids Res. 32:5392-7
Abstract	Most of the analyses on the conservation of gene order are limited to orthologous genes. However, the organization of genes into operons might also result in the conservation of gene order of paralogous genes. Thus, we sought computational evidence that conservation of gene order of paralogous genes represents another level of conservation of genes in operons. We found that pairs of genes within experimentally characterized operons of Escherichia coli K12 and Bacillus subtilis tend to have more adjacently conserved paralogs than pairs of genes at transcription unit boundaries. The fraction of same strand gene pairs corresponding to conserved paralogs averages 0.07 with a maximum of 0.22 in Borrelia burgdorferi. The use of evidence from the conservation of adjacency of paralogous genes can improve the prediction of operons in E.coli K12 by approximately 0.27 over predictions using conservation of adjacency of orthologous genes alone.
Links	PubMed PMC524292 Online version:10.1093/nar/gkh882
Keywords	Bacillus subtilis/genetics; Computational Biology; Escherichia coli/genetics; Gene Order; Operon
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