REPdenovo

REPdenovo: Reference-free repeat sequence assembly from raw shotgun reads

REPdenovo assembles repetitive DNA sequences directly from raw shotgun sequencing data without reliance on reference genomes, enabling reconstruction of highly repetitive, low-divergence, and long repeat regions from short-read data.

Key Features:

• Direct Assembly from Raw Data: Operates on raw shotgun sequencing reads without using pre-existing reference genomes.
• Handling Highly Repetitive and Divergent Sequences: Constructs diverse repeat types, including highly repetitive and low-divergence sequences in complex genomes.
• Reconstruction of Long Repeats: Reconstructs long repeat sequences from short reads, capturing extensive repetitive regions.
• Improved Completeness and Quantity: Recovers repeat sequences with higher completeness and yield than existing assembly methods.

Scientific Applications:

• Genome Annotation: Improves genome annotation by enabling identification and integration of previously unrecognized repetitive elements.
• Evolutionary Studies: Supports discovery and comparative analysis of repeat sequence incorporation across genomes, including parasites.
• Host-Derived Repeat Sequences in Parasite Genomes: Detects repeat sequences in human sequencing data that are also present in parasite genomes, indicating persistence linked to host DNA filtering during sequencing.

Methodology:

Applies a novel algorithmic strategy to assemble repeat sequences directly from raw shotgun reads, addressing challenges associated with repetitive regions and sequence divergence in conventional genome assembly pipelines.