ClinVar Miner

Submissions for variant NM_001363711.2(DUOX2):c.1462G>A (p.Gly488Arg) (rs191759494)

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Total submissions: 4
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Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Soonchunhyang University Bucheon Hospital,Soonchunhyang University Medical Center RCV000490324 SCV000267295 likely pathogenic Thyroid dyshormonogenesis 6 2016-03-18 criteria provided, single submitter reference population
Laboratory for Molecular Medicine,Partners HealthCare Personalized Medicine RCV000614180 SCV000731474 pathogenic Familial thyroid dyshormonogenesis 2017-04-14 criteria provided, single submitter clinical testing The p.Gly488Arg (NM014080.4 c.1462G>A) variant in DUOX2 has been reported in 9 h eterozygous, 3 homozygous, and 8 compound heterozygous Asian individuals with cl inical features of congenital hypothyroidism and related disorders (Narumi 2011, Yoshizawa-Ogasawara 2013, Jin 2014, Park 2016, Srichomkwun 2017). This variant has been identified in 0.15% (13/8,652) of East Asian chromosomes by the Exome A ggregation Consortium (ExAC, http://exac.broadinstitute.org; dbSNP rs191759494). Although this variant has been seen in the general population, its frequency is low enough to be consistent with a recessive carrier frequency. In vitro func tional studies provide support that the p.Gly488Arg variant impacts protein func tion (Narumi 2011 and Jin 2015). In summary, this variant meets criteria to be c lassified as pathogenic for congenital hypothyroidism and related disorders in a n autosomal recessive manner based upon biallelic occurrence in affected individ uals, low frequency in control populations, and functional studies.
Illumina Clinical Services Laboratory,Illumina RCV000490324 SCV000915683 pathogenic Thyroid dyshormonogenesis 6 2018-08-15 criteria provided, single submitter clinical testing Across a selection of the available literature, the DUOX2 c.1462G>A (p.Gly488Arg) missense variant has been reported in at least 18 unrelated patients with congenital hypothyroidism, including in a homozygous state in two siblings and an unrelated individual, in a compound heterozygous state in at least seven individuals, and in a heterozygous state in nine individuals in whom a second variant in the DUOX2 gene was not identified (Narumi et al. 2011; Yoshizawa-Ogasawara et al. 2013; Jin et al. 2014; Park et al. 2016; Srichomkwun et al. 2017). In several of these cases, the variant was shown to be inherited from an unaffected parent. In addition, one patient with dyshormonogenesis and an enlarged thyroid was heterozygous for the p.Gly488Arg variant and a second missense variant, but phase was not specified (Narumi et al. 2011). The p.Gly488Arg variant was absent from at least 100 alleles and is reported at a frequency of 0.001503 in the East Asian population of the Exome Aggregation Consortium. By assaying hydrogen peroxide production, two independent groups showed the variant protein displays greatly reduced activity compared to the wild type protein in HEK293 and A549 cells (Narumi et al. 2011; Jin et al. 2014). Based on the collective evidence, the p.Gly488Arg variant is classified as pathogenic for congenital hypothyroidism. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population.
University of Washington Center for Mendelian Genomics, University of Washington RCV000755103 SCV000882921 likely pathogenic Nongoitrous Euthyroid Hyperthyrotropinemia 2017-01-01 no assertion criteria provided research

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