dbDNV

dbDNV catalogs and annotates duplicated gene nucleotide variants (DNVs) in human duplicated gene loci (DGLs) to distinguish true single nucleotide polymorphisms (SNPs) from variants arising from gene duplication in the context of next-generation sequencing-based association studies.

Key Features:

• DNV identification and annotation: Systematically identifies and annotates duplicated gene nucleotide variants (DNVs) located within duplicated gene loci (DGLs).
• Sequence alignment of DGLs: Uses sequence alignments of duplicated gene loci (DGLs) to detect single-base differences between nearly identical duplicated segments.
• Genome coverage: Associates duplicated gene loci with over 10% of human genes.
• DNV catalog size: Contains 1,236,956 annotated DNVs.
• DNV–SNP coupling: Includes 304,110 DNV-coupled SNPs that indicate SNP records also present as variants among duplicates.
• Exonic SNP coupling rate: Reports that approximately 58% of exonic SNPs in DGLs are coupled with DNVs.
• Mitigation of ambiguous SNP calls: Provides annotations that help distinguish true SNPs from duplication-derived variants to reduce false positive variant interpretation in sequence-based studies.

Scientific Applications:

• Genetic association studies: Improves SNP annotation accuracy in sequence-based association studies, including those using next-generation sequencing, to reduce false positives.
• Variant interpretation in duplicated regions: Enables more accurate curation and interpretation of variants located in duplicated gene loci (DGLs).
• Genomics and medical genetics: Supports analyses linking genetic variation to human disease risk and refining variant calls relevant to personalized medicine.

Methodology:

Systematic identification and annotation of DNVs was performed through sequence alignments of duplicated gene loci (DGLs).