samtools_filter

samtools_filter filters SAM/BAM alignments using the samtools view command from the SAMTools toolkit to retain reads that meet specified MAPQ, FLAG, read group/library, or genomic-region criteria for downstream genomic analyses.

Key Features:

• samtools view integration: Invokes the samtools view command from the SAMTools toolkit to apply alignment filtering criteria.
• Mapping Quality Filtering: Filters reads by mapping quality (MAPQ) to retain high-confidence alignments.
• FLAG Bits Filtering: Includes or excludes reads based on FLAG bits, such as secondary alignments or supplementary alignments.
• Read Group and Library Filtering: Filters reads by read group identifiers or library information to separate samples or libraries.
• Region-Based Filtering: Retains reads overlapping user-defined genomic regions for targeted analyses.

Scientific Applications:

• Reproducible computational biomedical research: Enables reproducible and transparent filtering of alignment data for downstream analyses.
• Metagenomic studies: Supports selection of relevant and high-quality alignments for metagenomic analyses.
• Phylogenetic and other genomic analyses: Provides curated alignment sets for phylogenetic analysis and other genomic applications where alignment integrity affects results.

Methodology:

Applies filtering by invoking samtools view; can be executed within Galaxy as an execution engine on cluster infrastructure and integrated into pipelines via the Galaxy API or the Bioblend library.