Genome Analysis Evolutionary Analysis of Enzymes Using Chisel

Motivation: Availability of large volumes of genomic and enzymatic data for taxonomically and phenotypically diverse organisms enables researchers to explore the adaptive mechanisms that led to diversification of enzymatic functions. We present Chisel, a computational framework and a pipeline for an automated, high-resolution analysis of evolutionary variations of enzymes. Chisel allows automatic as well as interactive identification and characterization of enzymatic sequences. Such knowledge can be used for comparative genomics, microbial diagnostics, metabolic engineering, drug design, and analysis of metagenomes. Results: Chisel is a comprehensive resource that contains 8,575 clusters and subsequent computational models specific for 939 distinct enzymatic functions and, when data is sufficient, their taxonomic variations. Application of Chisel to identification of enzymatic sequences in newly sequenced genomes, analysis of organism-specific metabolic networks, “binning” of metagenomes, and other biological problems are presented. We also provide a thorough analysis of Chisel performance with similar resources and manual annotations on the Shewanella oneidensis MR1 genome. Availability: Chisel is available for interactive use at http://compbio.mcs.anl.gov/CHISEL. The website also provides a user manual, clusters, and function-specific computational models. Supplementary Material: Additional data can be found at http://compbio.mcs.anl.gov/CHISEL/htmls/refs.html. Contacts: [email protected]; [email protected]