TY - JOUR
T1 - Unraveling Molecular Mechanisms of THAP1 Missense Mutations in DYT6 Dystonia
AU - Cheng, Fubo
AU - Walter, Michael
AU - Wassouf, Zinah
AU - Hentrich, Thomas
AU - Casadei, Nicolas
AU - Schulze-Hentrich, Julia
AU - Barbuti, Peter
AU - Krueger, Rejko
AU - Riess, Olaf
AU - Grundmann-Hauser, Kathrin
AU - Ott, Thomas
N1 - Funding Information:
We would like to thank the Quantitative Proteomics & Proteome Center Tuebingen (http://www.pct.uni-tuebingen.de/home.html) for doing mass spectrometry analysis in the study. We also thank the bio-bank of Hertie Institute, University of Tuebingen, by providing control fibroblasts for this study.
Funding Information:
Open Access funding provided by Projekt DEAL. This work was supported by the Fortune junior grant, University of Tuebingen (FC: 2407-0-0).
Publisher Copyright:
© 2020, The Author(s).
PY - 2020/7/1
Y1 - 2020/7/1
N2 - Mutations in THAP1 (THAP domain-containing apoptosis-associated protein 1) are responsible for DYT6 dystonia. Until now, more than eighty different mutations in THAP1 gene have been found in patients with primary dystonia, and two third of them are missense mutations. The potential pathogeneses of these missense mutations in human are largely elusive. In the present study, we generated stable transfected human neuronal cell lines expressing wild-type or mutated THAP1 proteins found in DYT6 patients. Transcriptional profiling using microarrays revealed a set of 28 common genes dysregulated in two mutated THAP1 (S21T and F81L) overexpression cell lines suggesting a common mechanism of these mutations. ChIP-seq showed that THAP1 can bind to the promoter of one of these genes, superoxide dismutase 2 (SOD2). Overexpression of THAP1 in SK-N-AS cells resulted in increased SOD2 protein expression, whereas fibroblasts from THAP1 patients have less SOD2 expression, which indicates that SOD2 is a direct target gene of THAP1. In addition, we show that some THAP1 mutations (C54Y and F81L) decrease the protein stability which might also be responsible for altered transcription regulation due to dosage insufficiency. Taking together, the current study showed different potential pathogenic mechanisms of THAP1 mutations which lead to the same consequence of DYT6 dystonia.
AB - Mutations in THAP1 (THAP domain-containing apoptosis-associated protein 1) are responsible for DYT6 dystonia. Until now, more than eighty different mutations in THAP1 gene have been found in patients with primary dystonia, and two third of them are missense mutations. The potential pathogeneses of these missense mutations in human are largely elusive. In the present study, we generated stable transfected human neuronal cell lines expressing wild-type or mutated THAP1 proteins found in DYT6 patients. Transcriptional profiling using microarrays revealed a set of 28 common genes dysregulated in two mutated THAP1 (S21T and F81L) overexpression cell lines suggesting a common mechanism of these mutations. ChIP-seq showed that THAP1 can bind to the promoter of one of these genes, superoxide dismutase 2 (SOD2). Overexpression of THAP1 in SK-N-AS cells resulted in increased SOD2 protein expression, whereas fibroblasts from THAP1 patients have less SOD2 expression, which indicates that SOD2 is a direct target gene of THAP1. In addition, we show that some THAP1 mutations (C54Y and F81L) decrease the protein stability which might also be responsible for altered transcription regulation due to dosage insufficiency. Taking together, the current study showed different potential pathogenic mechanisms of THAP1 mutations which lead to the same consequence of DYT6 dystonia.
KW - DYT6 dystonia
KW - Microarray analysis
KW - Missense mutation
KW - Protein stability
KW - Synaptic function
KW - THAP1
UR - http://www.scopus.com/inward/record.url?scp=85081411962&partnerID=8YFLogxK
UR - https://www.ncbi.nlm.nih.gov/pubmed/32112337
U2 - 10.1007/s12031-020-01490-2
DO - 10.1007/s12031-020-01490-2
M3 - Article
C2 - 32112337
AN - SCOPUS:85081411962
SN - 0895-8696
VL - 70
SP - 999
EP - 1008
JO - Journal of Molecular Neuroscience
JF - Journal of Molecular Neuroscience
IS - 7
ER -