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Mutational analysis of GABRG2 in a Japanese cohort with childhood epilepsies.

Abstract：

:A few mutations in the gene encoding the gamma 2 subunit of the gamma-aminobutyric acid receptor type A (GABRG2) have been reported in various types of epilepsy. The aim of this study is to investigate the role of GABRG2 in the pathogenesis of childhood epilepsy in a large Japanese cohort. Genetic analysis of GABRG2 was performed on 140 Japanese patients with various childhood epilepsies largely including Dravet syndrome and genetic epilepsy with febrile seizures plus. The mutational analysis identified one novel missense mutation of GABRG2 (c.236A>G: p.N40S) in a patient with generalized tonic-clonic seizures (GTCS). The mutation was heterozygous and replacing a highly conserved Asn residue with a Ser. The affected amino acid was located at residue 40 of the mature GABRG2 protein, which was near the first one of two high-affinity benzodiazepine-binding domains of the gamma2 subunit (Lys-41-Trp-82). This mutation in such an important position may hamper the function of the channel and contribute to the case's pathogenesis of GTCS.

journal_name

J Hum Genet

journal_title

Journal of human genetics

authors

Shi X,Huang MC,Ishii A,Yoshida S,Okada M,Morita K,Nagafuji H,Yasumoto S,Kaneko S,Kojima T,Hirose S

doi

10.1038/jhg.2010.47

subject

Has Abstract

pub_date

2010-06-01 00:00:00

pages

375-8

issue

6

eissn

1434-5161

issn

1435-232X

pii

jhg201047

journal_volume

55

pub_type

杂志文章

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