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NanoSatellite: accurate characterization of expanded tandem repeat length and sequence through whole genome long-read sequencing on PromethION


Date: 14th November 2019 | Source: Genome Biology

Authors: Arne De Roeck, Wouter De Coster, Liene Bossaerts, Rita Cacace, Tim De Pooter, Jasper Van Dongen, Svenn D'Hert, Peter De Rijk, Mojca Strazisar, Christine Van Broeckhoven, Kristel Sleegers.

Technological limitations have hindered the large-scale genetic investigation of tandem repeats in disease.

We show that long-read sequencing with a single Oxford Nanopore Technologies PromethION flow cell per individual achieves 30× human genome coverage and enables accurate assessment of tandem repeats including the 10,000-bp Alzheimer’s disease-associated ABCA7 VNTR. The Guppy “flip-flop” base caller and tandem-genotypes tandem repeat caller are efficient for large-scale tandem repeat assessment, but base calling and alignment challenges persist.

We present NanoSatellite, which analyzes tandem repeats directly on electric current data and improves calling of GC-rich tandem repeats, expanded alleles, and motif interruptions.

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