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. 2018 Dec;33(12):1968-1970.
doi: 10.1002/mds.27516. Epub 2018 Nov 19.

Identification of a large homozygous VPS13C deletion in a patient with early-onset Parkinsonism

Affiliations

Identification of a large homozygous VPS13C deletion in a patient with early-onset Parkinsonism

Hossein Darvish et al. Mov Disord. 2018 Dec.
No abstract available

Keywords: VPS13C; early-onset parkinsonism; genomic deletion; polyneuropathy.

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Conflict of interest statement

Financial disclosure/conflict of interest:

The authors declare they have no conflict of interest.

Figures

Fig 1.
Fig 1.
(A) WGS reads (Top) and Sanger chromatograms (Bottom) illustrating the large homozygous VPS13C deletion (Blank area, no reads) identified in an isolated patient with parkinsonism (https://databases.lovd.nl/shared/variants/0000368891). The WGS reads were visualized using the IGV tool. The Sanger chromatograms show the evidence of a 7-bp insertion between the deletion breakpoints (nucleotides between rectangles). The breakpoints of the deletion are highlighted with rectangles. (B) Pedigree of the family with parkinsonism and sensorimotor polyneuropathy. Wt/M indicates heterozygous carrier for the VPS13C large deletion; M/M indicates homozygous carrier; and Wt/Wt indicates non-carrier. Affected patient is represented with a black circle. (C) CNV plots of VPS13C exons 19, 35, and 61 obtained through ddPCR (QX100 system, Bio-rad) and corresponding taqman assays (Applied Biosystems) are shown. Homozygous Wt alleles are represented with a CNV score of 2 or close to 2, meaning both alleles carry a copy of the exon under investigation; heterozygous mutant alleles are represented with a CNV score of 1 or close to 1, meaning only one allele carry a copy of the exon while the exon is absent in the other allele; homozygous mutant alleles are represented with a CNV score of 0, meaning the exon under investigation is absent in both alleles. Only subject II-1 is homozygous carrier for the identified VPS13C deletion. (D): VPS13C protein (NP_065872.1) structure located at chromosome 15q22.2 and predicted by SMART (http://smart.embl-heidelberg.de). Functional domains along with reported VPS13C mutations are shown. The VPS13C mutation identified in this study is shown at the top of the protein. Chorein_N: N terminal region of Chorein, VPS13C_N: N terminal domain, mid-rpt: VPS13_mid_repeats, SHR-BD: SHR binding domain, VPS13C_C: C terminal domain, ATG_C: Autophagy related protein C terminal domain.

References

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