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ESTScan: a program for detecting, evaluating, and reconstructing potential coding regions in EST sequences.

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  • 1Swiss Institute of Bioinformatics, Epalinges, Switzerland. Christian.Iseli@isb-sib.ch

Abstract

One of the problems associated with the large-scale analysis of unannotated, low quality EST sequences is the detection of coding regions and the correction of frameshift errors that they often contain. We introduce a new type of hidden Markov model that explicitly deals with the possibility of errors in the sequence to analyze, and incorporates a method for correcting these errors. This model was implemented in an efficient and robust program, ESTScan. We show that ESTScan can detect and extract coding regions from low-quality sequences with high selectivity and sensitivity, and is able to accurately correct frameshift errors. In the framework of genome sequencing projects, ESTScan could become a very useful tool for gene discovery, for quality control, and for the assembly of contigs representing the coding regions of genes.

PMID:
10786296
[PubMed - indexed for MEDLINE]
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