PhyloMagnet

PhyloMagnet screens short-read meta-omics datasets (metagenomes and metatranscriptomes) by combining gene-centric assembly with phylogenetic placement to detect taxa and genes of interest.

Key Features:

• Gene-Centric Assembly: Performs gene-centric assembly of short reads to target specific genes or taxa without assembling whole genomes.
• Phylogenetic Placement: Uses phylogenetic placement to position assembled sequences within existing phylogenies for taxonomic and gene identification.
• High Accuracy and Sensitivity: Benchmarks on an in vitro mock community identified up to 87% of genera present, with a reported false positive rate per single gene tree of 0–23%.
• Application Versatility: Detects taxonomic labels from metagenome-assembled genomes (MAGs) and aligns phylogenetic placements with transcripts derived from transcriptome assemblies.

Scientific Applications:

• Microbial ecology and environmental genomics: Screening complex microbial communities to detect taxa and genes from environments such as soil, water, and host-associated microbiomes.
• Taxonomic profiling: Identifying and placing taxa within phylogenies from metagenomic and metatranscriptomic short-read data.
• Gene expression and function studies: Aligning phylogenetic placements with transcriptome-derived transcripts to investigate gene expression patterns and functional inference in situ.

Methodology:

Computational steps explicitly include gene-centric assembly of short reads followed by phylogenetic placement of assembled sequences into existing phylogenies, applied to metagenomes, metatranscriptomes, metagenome-assembled genomes (MAGs) and transcriptome-derived transcripts, with benchmarking using an in vitro mock community.