VarGenius-HZD

VarGenius-HZD detects rare homozygous and hemizygous single-exon deletions in targeted sequencing data to support genetic diagnosis and genomic research.

Key Features:

• Sensitivity and scalability: Leverages breadth of coverage in targeted sequencing to achieve high sensitivity and scalable detection of rare homozygous deletions.
• Algorithmic innovation: Implements a novel algorithm tailored to identify both homozygous and hemizygous single-exon deletions by analyzing coverage patterns.
• Validation and performance: Demonstrated superior sensitivity on fifty exomes from the 1000 Genomes Project, detecting real and synthetic rare homozygous deletions missed by other algorithms.

Scientific Applications:

• Clinical diagnostics: Detection of rare homozygous and hemizygous deletions in targeted sequencing to support genetic diagnosis, including identification of causal variants in inherited retinal dystrophies (five diagnoses reported).
• Genetic research: Identification of rare homozygous deletions to study genomic variation and disease pathogenesis.

Methodology:

Analyzes targeted sequencing coverage patterns using a novel algorithm focused on breadth of coverage to distinguish homozygous and hemizygous single-exon deletions from sequencing noise; validated using fifty 1000 Genomes exomes and synthetic deletions.