GUNC: Detecting the invisible contamination in prokaryotic genomes
Discovered that 15-30% of "high-quality" metagenome-assembled genomes were actually chimeras - contamination that existing quality control tools completely missed. GUNC detects chimerism by analyzing the lineage homogeneity of individual contigs, revealing hidden genome assembly artifacts.
Impact
- Revealed 15-30% of 'high-quality' MAGs were undetected chimeras
- 250+ citations since 2021 publication in Genome Biology
- Improved quality standards for prokaryotic genome databases worldwide