A novel de novo nonsense mutation in ZC4H2 causes Wieacker-Wolff Syndrome.

Abstract:

BACKGROUND:Wieacker-Wolff syndrome (WWS) is a congenital X-linked neuromuscular disorder, which was firstly reported in 1985. Zinc finger C4H2-type containing (ZC4H2) gene has been found to be associated with the disease pathogenesis. However, the underlying mechanism remains elusive. METHODS:Whole-exome sequencing was performed to identify the mutations. Expression plasmids were constructed and cell culture and immune-biochemical assays were used to examine the effects of the mutation. RESULTS:We reported a female patient with classical symptoms of WWS and discovered a novel nonsense heterozygous mutation (p.R67X; c.199C>T) in ZC4H2 gene in the patient but not in her parents. The mutation resulted in a 66 amino-acid truncated ZC4H2 protein. The mutation is located in the key helix domain and it altered the subcellular locations of the mutant ZC4H2 protein. X-chromosome inactivation (XCI) pattern analysis revealed that the XCI ratio of the proband was 22:78. CONCLUSION:Female heterozygous carriers with nonsense mutation with a truncated ZC4H2 protein could lead to the pathogenesis of Wieacker-Wolff syndrome and our study provides a potential new target for the disease treatment.

journal_name

Mol Genet Genomic Med

authors

Wang D,Hu D,Guo Z,Hu R,Wang Q,Liu Y,Liu M,Meng Z,Yang H,Zhang Y,Cai F,Zhou W,Song W

doi

10.1002/mgg3.1100

subject

Has Abstract

pub_date

2020-02-01 00:00:00

pages

e1100

issue

2

issn

2324-9269

journal_volume

8

pub_type

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