Jannovar

Jannovar annotates genetic variants and performs pedigree analyses to provide transcript-based interpretation of whole-exome and genome sequencing data.

Key Features:

• Transcript-Based Annotation: Uses an interval tree data structure to identify all transcripts impacted by variants and produces HGVS-compliant annotations for coding sequences, splice junctions, untranslated regions, and noncoding RNA transcripts.
• Pedigree Analysis: Performs family-based pedigree analysis using Variant Call Format (VCF) files to assess Mendelian inheritance patterns across generations.
• VCF Input Support: Accepts and annotates variants from Variant Call Format (VCF) files for both single-sample and family-based analyses.
• Implementation: Provided as a Java library and standalone Java application for integration into analysis workflows.
• Performance Efficiency: Optimized for speed, annotating typical exome VCF files in seconds on a standard desktop configuration.

Scientific Applications:

• Genetic Diagnostics: Supports identification and annotation of pathogenic mutations relevant to genetic disorder diagnosis.
• Disease-Gene Discovery: Enables pinpointing of candidate genes implicated in hereditary diseases through transcript-aware variant annotation.
• Pedigree Studies: Facilitates study of inheritance patterns and segregation of genetic traits within families to investigate Mendelian disorders.

Methodology:

Maps variants to transcripts using an interval tree data structure, generates HGVS-compliant transcript-based annotations, and conducts pedigree analysis on VCF files.