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Mutations in the DNA methyltransferase gene DNMT3A cause an overgrowth syndrome with intellectual disability.

Abstract：

:Overgrowth disorders are a heterogeneous group of conditions characterized by increased growth parameters and other variable clinical features such as intellectual disability and facial dysmorphism. To identify new causes of human overgrowth, we performed exome sequencing in ten proband-parent trios and detected two de novo DNMT3A mutations. We identified 11 additional de novo mutations by sequencing DNMT3A in a further 142 individuals with overgrowth. The mutations alter residues in functional DNMT3A domains, and protein modeling suggests that they interfere with domain-domain interactions and histone binding. Similar mutations were not present in 1,000 UK population controls (13/152 cases versus 0/1,000 controls; P < 0.0001). Mutation carriers had a distinctive facial appearance, intellectual disability and greater height. DNMT3A encodes a DNA methyltransferase essential for establishing methylation during embryogenesis and is commonly somatically mutated in acute myeloid leukemia. Thus, DNMT3A joins an emerging group of epigenetic DNA- and histone-modifying genes associated with both developmental growth disorders and hematological malignancies.

journal_name

Nat Genet

journal_title

Nature genetics

authors

Tatton-Brown K,Seal S,Ruark E,Harmer J,Ramsay E,Del Vecchio Duarte S,Zachariou A,Hanks S,O'Brien E,Aksglaede L,Baralle D,Dabir T,Gener B,Goudie D,Homfray T,Kumar A,Pilz DT,Selicorni A,Temple IK,Van Maldergem L,Yac

doi

10.1038/ng.2917

subject

Has Abstract

pub_date

2014-04-01 00:00:00

pages

385-8

issue

4

eissn

1061-4036

issn

1546-1718

pii

ng.2917

journal_volume

46

pub_type

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