GROC-SVs

GROC-SVs reconstructs complex structural variants by identifying large-scale structural variants and assembling breakpoint sequences using 10x Genomics read-cloud long-fragment information integrated with short-read sequencing.

Key Features:

• Read Cloud Approach: Utilizes the 10x Genomics read-cloud approach, where microfluidic partitioning and barcoding of long genomic DNA fragments retain long-range information within short sequencing reads.
• Improved Specificity and Sensitivity: Improves specificity of breakpoint detection while maintaining sensitivity comparable to traditional short-fragment sequencing methods.
• Simultaneous Assembly Across Multiple Breakpoints: Performs sequence assembly across multiple breakpoints simultaneously to reconstruct complex events such as chromothriptic rearrangements.
• Application to Cancer Genomics: Applied to Illumina-sequenced 10x Genomics datasets from sarcoma and breast cancer samples for structural-variation characterization.
• Insights into Structural Variation Dynamics: Enables analysis showing that chromothriptic rearrangements often precede copy number amplifications and that single-nucleotide variant and structural-variation rates are not correlated.

Scientific Applications:

• Genome-wide SV detection and reconstruction: Detects and reconstructs complex structural variants genome-wide by assembling breakpoint sequences from read-cloud data.
• Cancer genomics: Characterizes tumor genomic architecture and evolution, demonstrated on sarcoma and breast cancer 10x/Illumina datasets.
• Study of structural-variation dynamics: Investigates temporal relationships among chromothriptic rearrangements, copy number amplifications, and the independence of SNV versus SV rates.

Methodology:

Uses 10x Genomics read-cloud data generated by microfluidic partitioning and barcoding of long genomic DNA fragments, integrates barcoded short reads from short-read sequencing (Illumina), and performs breakpoint sequence assembly including simultaneous assembly across multiple breakpoints.