Genome ARTIST

Genome ARTIST maps artificial transposon (AT) insertions at nucleotide-level accuracy in insertional mutagenesis experiments, resolving sequencing artifacts and nearby single nucleotide polymorphisms (SNPs) and small indels and detecting transposon self-insertions.

Key Features:

• Pairwise gapped aligner: Performs pairwise gapped alignments for mapping AT insertion junctions.
• Heuristic similarity search: Uses a heuristic approach to identify DNA sequence similarities between query and reference sequences.
• Multi-step Smith-Waterman: Implements a multi-step Smith-Waterman algorithm to compute precise alignment mappings.
• Junction artifact resolution: Resolves sequencing artifacts and mutations such as SNPs and small indels near the junction between genomic sequences and transposon inverted repeats (TIRs).
• Transposon self-insertion mapping: Detects and maps transposon self-insertions.
• Scale of applicability: Tailored for small to medium-scale insertional mutagenesis experiments rather than next-generation sequencing (NGS) datasets.
• Genome repository support: Supports genomes available in Ensembl and GenBank repositories.
• Drosophila enhancements: Incorporates Drosophila melanogaster sequence annotation data from FlyBase for detailed mapping of genomic features, including natural transposons.
• Validation: Validated against other alignment tools using real and simulated query sequences from Drosophila melanogaster and Mus musculus.
• Additional alignment uses: Applicable to SNP detection and evaluation of primer and probe specificity.

Scientific Applications:

• Nucleotide-resolution insertion mapping: Mapping AT insertions at nucleotide-level resolution in insertional mutagenesis experiments.
• Self-insertion analysis: Identification and localization of transposon self-insertions.
• Genomic feature mapping: Detailed mapping of insertion sites relative to genomic features and natural transposons using FlyBase annotations for Drosophila melanogaster.
• SNP detection: Detection and characterization of SNPs near insertion junctions.
• Primer and probe evaluation: Assessment of primer and probe specificity through alignment-based specificity checks.
• Alignment benchmarking: Comparative benchmarking of alignment accuracy against other aligners using real and simulated queries from D. melanogaster and M. musculus.

Methodology:

Performs pairwise gapped alignment using a heuristic similarity search followed by a multi-step Smith-Waterman implementation to compute precise alignment mappings.