PMID- 17993667 OWN - NLM STAT- MEDLINE DCOM- 20080321 LR - 20071112 IS - 1064-3745 (Print) IS - 1064-3745 (Linking) VI - 395 DP - 2007 TI - WebACT: an online genome comparison suite. PG - 57-74 AB - Comparison of related genomes is an enormously powerful technique for explaining phenotypic differences and revealing recent evolutionary events. Genomes evolve through a host of mechanisms including long- and short-range intragenomic rearrangements, insertion of laterally acquired DNA, gene loss, and single-nucleotide polymorphisms. The Artemis Comparison Tool (ACT) was developed to enable the intuitive visualization of the consequences of such events in the context of two or more aligned genomes. WebACT is an online resource designed to allow the alignment of up to five genomic sequences within the ACT environment without the need for local software installation. Comparisons can be carried out between uploaded sequences, or those selected from the EMBL or RefSeq databases, using BLASTZ, MUMmer, or Basic Local Alignment Search Tool (BLAST). Precomputed comparisons can be selected from a database covering all the completed bacterial chromosome and plasmid sequences in the Genome Reviews database (1). This allows the rapid visualization of regions of interest, without the need to handle the full genome sequences. Here, we describe the process of using WebACT to prepare comparisons for visualization, and the selection of precomputed comparisons from the database. The use of ACT to view the selected comparison is then explored using examples from bacterial genomes. FAU - Abbott, James C AU - Abbott JC AD - Centre for Bioinformatics, Imperial College London, UK. FAU - Aanensen, David M AU - Aanensen DM FAU - Bentley, Stephen D AU - Bentley SD LA - eng GR - Wellcome Trust/United Kingdom PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Methods Mol Biol JT - Methods in molecular biology (Clifton, N.J.) JID - 9214969 SB - IM MH - *Databases, Genetic MH - *Genome MH - *Internet MH - Polymorphism, Single Nucleotide MH - Sequence Alignment MH - User-Computer Interface EDAT- 2007/11/13 09:00 MHDA- 2008/03/22 09:00 CRDT- 2007/11/13 09:00 PHST- 2007/11/13 09:00 [pubmed] PHST- 2008/03/22 09:00 [medline] PHST- 2007/11/13 09:00 [entrez] AID - 1-59745-514-8:57 [pii] PST - ppublish SO - Methods Mol Biol. 2007;395:57-74.