10-71739675-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_022124.6(CDH23):c.4391C>T(p.Ala1464Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000319 in 1,613,206 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/17 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00028 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00032 ( 2 hom. )

Consequence

CDH23
NM_022124.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:8B:1

Conservation

PhyloP100: 2.95

Variant links:

Genes affected

CDH23 (HGNC:13733): (cadherin related 23) This gene is a member of the cadherin superfamily, whose genes encode calcium dependent cell-cell adhesion glycoproteins. The encoded protein is thought to be involved in stereocilia organization and hair bundle formation. The gene is located in a region containing the human deafness loci DFNB12 and USH1D. Usher syndrome 1D and nonsyndromic autosomal recessive deafness DFNB12 are caused by allelic mutations of this cadherin-like gene. Upregulation of this gene may also be associated with breast cancer. Alternative splice variants encoding different isoforms have been described. [provided by RefSeq, May 2013]

CDH23 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.016872019).

BS2

High Homozygotes in GnomAdExome4 at 2 AD,AR,Digenic gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CDH23	NM_022124.6 link	c.4391C>T	p.Ala1464Val	missense_variant	Exon 36 of 70	ENST00000224721.12	NP_071407.4	Q9H251-1Q6P152

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CDH23	ENST00000224721.12 link	c.4391C>T	p.Ala1464Val	missense_variant	Exon 36 of 70	5	NM_022124.6	ENSP00000224721.9		Q9H251-1
CDH23	ENST00000398792.3 link	n.1080C>T		non_coding_transcript_exon_variant	Exon 7 of 9	2

Frequencies

GnomAD3 genomes

AF:

0.000276

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000966

Gnomad AMI

AF:

0.00768

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000426

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000198

AC:

AN:

246942

Hom.:

AF XY:

0.000164

AC XY:

AN XY:

134212

show subpopulations

Gnomad AFR exome

AF:

0.000132

Gnomad AMR exome

AF:

0.000204

Gnomad ASJ exome

AF:

0.000100

Gnomad EAS exome

AF:

0.0000558

Gnomad SAS exome

AF:

0.0000330

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000331

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000323

AC:

472

AN:

1460920

Hom.:

Cov.:

AF XY:

0.000323

AC XY:

235

AN XY:

726688

show subpopulations

Gnomad4 AFR exome

AF:

0.0000897

Gnomad4 AMR exome

AF:

0.000179

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000128

Gnomad4 FIN exome

AF:

0.0000188

Gnomad4 NFE exome

AF:

0.000386

Gnomad4 OTH exome

AF:

0.000265

GnomAD4 genome

AF:

0.000276

AC:

AN:

152286

Hom.:

Cov.:

AF XY:

0.000255

AC XY:

AN XY:

74462

show subpopulations

Gnomad4 AFR

AF:

0.0000963

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000426

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000393

Hom.:

Bravo

AF:

0.000272

TwinsUK

AF:

0.00108

AC:

ALSPAC

AF:

0.00130

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000241

AC:

ExAC

AF:

0.000182

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:8Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:2

Jun 28, 2017

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant classified as Uncertain Significance - Favor Benign. The p.Ala1464Val va riant in CDH23 has been reported in 2 individuals with hearing loss; however in 1 of these individuals had an alternate etiology of the hearing loss identified (Shearer 2013, LMM unpublished data). This variant has also been identified in 0.03% (41/125814) of European chromosomes by the Genome Aggregation Database (gn omAD, http://gnomad.broadinstitute.org/; dbSNP rs374362883); however, its freque ncy is not high enough to rule out a pathogenic role. The alanine (Ala) at posi tion 1464 is not conserved in mammals or evolutionary distant species, with 1 ma mmal (gibbon) having a valine (Val), supporting that a change at this position c ould be tolerated. Additional computational prediction tools and conservation an alyses do not provide strong support for or against an impact to the protein. In summary, while the clinical significance of the p.Ala1464Val variant is uncerta in, the conservation data suggests that it is more likely to be benign. -

Apr 08, 2022

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: CDH23 c.4391C>T (p.Ala1464Val) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.0002 in 246942 control chromosomes in the gnomAD database, including 1 homozygote. This frequency is not significantly higher than estimated for a pathogenic variant in CDH23 causing Usher Syndrome (0.0002 vs 0.0032), allowing no conclusion about variant significance. c.4391C>T has been reported in the literature as a non-informative genotype (second allele and/or zygosity not specified) in settings of multigene panel testing in at-least one individual with deafness (example, Shearer_2014). These report(s) do not provide unequivocal conclusions about association of the variant with Usher Syndrome. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Six clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation (VUS, n=5, Likely Benign, n=1). Based on the evidence outlined above, the variant was classified as uncertain significance. -

not provided

Uncertain:1Benign:1

Jan 06, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 1464 of the CDH23 protein (p.Ala1464Val). This variant is present in population databases (rs374362883, gnomAD 0.03%). This missense change has been observed in individual(s) with non-syndromic hearing loss (PMID: 23804846). ClinVar contains an entry for this variant (Variation ID: 45947). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on CDH23 protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Jul 16, 2020

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 23804846) -

Autosomal recessive nonsyndromic hearing loss 12;C1832845:Usher syndrome type 1D;C4539685:Pituitary adenoma 5, multiple types

Uncertain:1

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

CDH23-related disorder

Uncertain:1

Sep 27, 2024

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

The CDH23 c.4391C>T variant is predicted to result in the amino acid substitution p.Ala1464Val. This variant was reported in an individual with hearing loss along with other potentially causative variants in this and other hearing loss related genes (Data S3, Shearer et al. 2013. PubMed ID: 23804846). This variant is reported in 0.032% of alleles in individuals of European (Non-Finnish) descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Usher syndrome type 1

Uncertain:1

Apr 15, 2020

Natera, Inc.

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Usher syndrome type 1D

Uncertain:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Autosomal recessive nonsyndromic hearing loss 12

Uncertain:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.48

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.023

T;T

Eigen

Benign

-0.36

Eigen_PC

Benign

-0.23

FATHMM_MKL

Benign

0.58

LIST_S2

Benign

0.74

T;T

M_CAP

Benign

0.012

MetaRNN

Benign

0.017

T;T

MetaSVM

Benign

-0.90

MutationAssessor

Benign

0.92

.;L

PrimateAI

Benign

0.34

REVEL

Benign

0.042

Sift4G

Benign

0.092

T;.

Polyphen

0.025

.;B

Vest4

0.44

MVP

0.60

ClinPred

0.068

GERP RS

3.7

Varity_R

0.20

gMVP

0.20

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over