MGmapper

MGmapper assigns NGS reads to reference sequences and generates taxonomic annotations for species- and strain-level metagenomic analysis.

Key Features:

• Reference-Based Sequence Assignment: Processes raw NGS data by mapping reads against reference databases for sequence assignment.
• Post-Processing Analysis: Applies a post-processing step that refines taxonomy annotations and reduces false positives.
• High Accuracy in Taxonomy Assignment: In a benchmark using an in-vitro bacterial mock community (8 genera, 11 species, 12 strains), MGmapper achieved 100% correct genus- and species-level assignments after post-processing and 75% sensitivity and precision at strain level.
• Comparative Performance: Assigned taxonomy at the species level using 84.8% of sequence reads versus Kraken's 70.5%, with both tools identifying all species without false positives.
• Extensive Read Count Statistics: Generates detailed read count statistics for accepted and rejected taxonomy annotations in plain text and Excel formats.
• Custom Database Support: Supports use of custom reference databases for sequence assignment.

Scientific Applications:

• Metagenomic community profiling: Enables species- and strain-level characterization of microbial communities from NGS data.
• Pathogen detection: Supports detection and taxonomic assignment of pathogenic bacteria at species and strain resolution.
• Ecological and biodiversity studies: Provides high-confidence taxonomic annotations useful for ecological surveys and biodiversity analyses.

Methodology:

Maps NGS reads against reference databases, performs a post-processing refinement of taxonomy annotations, and outputs read count statistics in plain text and Excel formats.