1. DNA Methylation Signature for EZH2 Functionally Classifies Sequence Variants in Three PRC2 Complex Genes.
- Author
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Choufani, Sanaa, Gibson, William T., Turinsky, Andrei L., Chung, Brian H.Y., Wang, Tianren, Garg, Kopal, Vitriolo, Alessandro, Cohen, Ana S.A., Cyrus, Sharri, Goodman, Sarah, Chater-Diehl, Eric, Brzezinski, Jack, Brudno, Michael, Ming, Luk Ho, White, Susan M., Lynch, Sally Ann, Clericuzio, Carol, Temple, I. Karen, Flinter, Frances, and McConnell, Vivienne
- Subjects
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DNA methylation , *INTELLECTUAL disabilities , *TRANSLATIONAL research , *MOSAICISM , *GENES - Abstract
Weaver syndrome (WS), an overgrowth/intellectual disability syndrome (OGID), is caused by pathogenic variants in the histone methyltransferase EZH2 , which encodes a core component of the Polycomb repressive complex-2 (PRC2). Using genome-wide DNA methylation (DNAm) data for 187 individuals with OGID and 969 control subjects, we show that pathogenic variants in EZH2 generate a highly specific and sensitive DNAm signature reflecting the phenotype of WS. This signature can be used to distinguish loss-of-function from gain-of-function missense variants and to detect somatic mosaicism. We also show that the signature can accurately classify sequence variants in EED and SUZ12 , which encode two other core components of PRC2, and predict the presence of pathogenic variants in undiagnosed individuals with OGID. The discovery of a functionally relevant signature with utility for diagnostic classification of sequence variants in EZH2 , EED , and SUZ12 supports the emerging paradigm shift for implementation of DNAm signatures into diagnostics and translational research. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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