Abstract
X-linked dystonia-parkinsonism (XDP) is a neurodegenerative movement disorder endemic to the Philippines. The disease is caused by the antisense insertion of a SINE-VNTR-Alu (SVA)-type retrotransposon within an intron of the TAF1 gene. Within the SVA, there is a polymorphic hexanucleotide repeat domain, (CCCTCT)n, which varies between 30 and 55 repeats and correlates with age at disease onset. There has been evidence to suggest that various hexanucleotide lengths influence the transcriptional activity of TAF1. Here we describe the experimental methods used to investigate repeat expansions within the SVA of the TAF1 gene. Specifically, we describe fragment analysis, Southern blotting, and nanopore single-molecule sequencing. Our goal is to provide the reader with guidelines on how to perform the wet lab techniques and bioinformatic pipelines to detect repeat expansions.
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Reyes, C.J., Lüth, T., Trinh, J. (2022). Analysis of the Hexanucleotide Repeat Domain in the TAF1 SVA Retrotransposon in X-Linked Dystonia-Parkinsonism. In: Proukakis, C. (eds) Genomic Structural Variants in Nervous System Disorders. Neuromethods, vol 182. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-2357-2_8
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