Novel heterozygous variants in KMT2D associated with holoprosencephaly.

Abstract:

:Lysine methyltransferase 2D (KMT2D; OMIM 602113) encodes a histone methyltransferase involved in transcriptional regulation of the beta-globin and estrogen receptor as part of a large protein complex known as activating signal cointegrator-2-containing complex (ASCOM). Heterozygous germline mutations in the KMT2D gene are known to cause Kabuki syndrome (OMIM 147920), a developmental multisystem disorder. Neither holoprosencephaly nor other defects in human forebrain development have been previously associated with Kabuki syndrome. Here we report two patients diagnosed with alobar holoprosencephaly in their antenatal period with de novo monoallelic KMT2D variants identified by trio-based exome sequencing. The first patient was found to have a stop-gain variant c.12565G>T (p.Gly4189*), while the second patient had a missense variant c.5A>G (p.Asp2Gly). Phenotyping of each patient did not reveal any age-related feature of Kabuki syndrome. These two cases represent the first report on association between KMT2D and holoprosencephaly.

journal_name

Clin Genet

journal_title

Clinical genetics

authors

Tekendo-Ngongang C,Kruszka P,Martinez AF,Muenke M

doi

10.1111/cge.13598

subject

Has Abstract

pub_date

2019-09-01 00:00:00

pages

266-270

issue

3

eissn

0009-9163

issn

1399-0004

journal_volume

96

pub_type

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