ExceS-A

ExceS-A performs exon-centric spliced alignment to produce homology-based annotations of protein sequences and enable exon-by-exon comparisons of coding sequences for distinguishing paralogous gene family members.

Key Features:

• Exon-centric spliced aligner: Aligns coding sequences at the exon level to preserve exon/intron structure in spliced alignments.
• Homology-based protein annotation: Generates homology-based annotations of protein sequences via spliced alignment against genomic sequences.
• Exon-by-exon comparison: Performs exon-by-exon comparisons of coding sequences to distinguish paralogous gene family members.
• blat-based approach: Implements a simple, blat-based approach that is robust to genes with very large introns and fragmented genome assemblies.
• Pipeline integration: Integrates with the ExonMatchSolver pipeline to support downstream exon-centric analyses.

Scientific Applications:

• Homology annotation: Produces exon-aware homology annotations of protein sequences for improved gene models.
• Paralog discrimination: Enables discrimination of paralogous gene family members through exon-by-exon coding sequence comparisons.
• Complex genome annotation: Facilitates accurate gene structure annotation in genomes with very large introns or fragmented genome assemblies.
• Genomics and proteomics studies: Supports studies requiring precise exon-level alignments for interpretation of gene structure and function.

Methodology:

Uses a simple, blat-based spliced alignment approach and exon-by-exon comparisons within the ExonMatchSolver pipeline.