ClinVar Miner

Submissions for variant NM_022124.6(CDH23):c.9569C>T (p.Ala3190Val) (rs111033536)

Minimum review status: Collection method:
Minimum conflict level:
ClinVar version:
Total submissions: 4
Download table as spreadsheet
Submitter RCV SCV Clinical significance Condition Last evaluated Review status Method Comment
Fulgent Genetics,Fulgent Genetics RCV000763669 SCV000894549 uncertain significance Deafness, autosomal recessive 12; Usher syndrome, type 1D; PITUITARY ADENOMA 5, MULTIPLE TYPES 2018-10-31 criteria provided, single submitter clinical testing
GeneDx RCV000766715 SCV000564847 uncertain significance not provided 2018-10-15 criteria provided, single submitter clinical testing The A3190V variant in the CDH23 gene has been reported previously in the heterozygous state in an individual with Usher syndrome, type II who was also heterozygous for a duplication of exon 29; however, the phase of these two alterations is unknown (Aparisi et al., 2014). The A3190V variant was not observed at any significant frequency in approximately 6300 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project, indicating it is not a common benign variant in these populations. The A3190V variant is a conservative amino acid substitution, which is not likely to impact secondary protein structure as these residues share similar properties. This substitution occurs at a position that is conserved across species. In silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. We interpret A3190V as a variant of uncertain significance.
Illumina Clinical Services Laboratory,Illumina RCV000779032 SCV000915480 uncertain significance CDH23-Related Disorders 2017-12-05 criteria provided, single submitter clinical testing The CDH23 c.9569C>T (p.Ala3190Val) missense variant has been reported in two studies in which it is identified in a compound heterozygous state in two individuals, one with a diagnosis of Usher syndrome and one with autosomal recessive nonsyndromic hearing loss (Aparisi et al. 2014; Sommen et al. 2016). Control data are unavailable for this variant, which is reported at a frequency of 0.00047 in the European (non-Finnish) population of the Exome Aggregation Consortium. The evidence for this variant is limited. Based on the evidence, the p.Ala3190Val variant is classified as a variant of unknown significance but suspicious for pathogenicity for CDH23-related disorders. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population.
Laboratory for Molecular Medicine,Partners HealthCare Personalized Medicine RCV000039313 SCV000062997 uncertain significance not specified 2017-09-12 criteria provided, single submitter clinical testing The p.Ala3190Val variant in CDH23 has been reported in 1 individual with Usher s yndrome who also had a duplication of exon 29 in CDH23 that is of uncertain sign ificance (Aparisi 2014), and in 1 individual with hearing loss who also had the p.Arg3206Cys variant of uncertain significance in CDH23 (Sommen 2016). The p.Ala 3190Val variant has also been identified by our laboratory in the heterozygous s tate in 3 individuals with hearing loss; however, a variant affecting the remain ing copy of CDH23 was not identified in any of these individuals. This variant h as been identified in 0.08% (8/10122) of Ashkenazi Jewish chromosomes and 0.05% (64/126200) European chromosomes by Genome Aggregation Database (gnomAD, http:// gnomad.broadinstitute.org; dbSNP rs111033536). Although this variant has been se en in the general population, its frequency is not high enough to rule out a pat hogenic role. Computational prediction tools and conservation analyses suggest t hat this variant may impact the protein, though this information is not predicti ve enough to determine pathogenicity. In summary, the clinical significance of t he p.Ala3190Val variant is uncertain.

The information on this website is not intended for direct diagnostic use or medical decision-making without review by a genetics professional. Individuals should not change their health behavior solely on the basis of information contained on this website. Neither the University of Utah nor the National Institutes of Health independently verfies the submitted information. If you have questions about the information contained on this website, please see a health care professional.