ExceS-A: an exon-centric split aligner.

Area of Science:

• Genomics
• Bioinformatics
• Computational Biology

Background:

• High-quality homology-based annotations of protein sequences rely on spliced alignments.
• Exon/intron structure from spliced alignments aids in distinguishing gene family members.
• Existing tools face challenges with genes containing large introns or fragmented genome assemblies.

Purpose of the Study:

• To present an exon-centric pipeline for spliced alignment.
• To facilitate exon-by-exon comparisons of coding sequences.
• To offer an alternative to established spliced alignment tools.

Main Methods:

• Development of an exon-centric pipeline for spliced alignment.
• Utilizing a simple, blat-based approach for alignment.
• Comparative analysis against established spliced alignment tools.

Main Results:

• The exon-centric pipeline demonstrates advantages over established methods.
• The approach is particularly effective for genes with very large introns.
• The pipeline shows utility in applications involving fragmented genome assemblies.

Conclusions:

• The proposed exon-centric pipeline offers an effective strategy for spliced alignment.
• This method enhances the accuracy of homology-based protein annotations.
• The tool provides a valuable alternative for analyzing complex genomic structures.