NM_022124.6:c.385G>A

Variant names:

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 0P and 7B. BP4_ModerateBS1_SupportingBS2

The NM_022124.6(CDH23):c.385G>A(p.Ala129Thr) variant causes a missense change. The variant allele was found at a frequency of 0.000535 in 1,613,624 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A129V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00028 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00056 ( 2 hom. )

Consequence

CDH23
NM_022124.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:9

Conservation

PhyloP100: 4.26

Publications

6 publications found

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:

CDH23-AS1 (HGNC:31433): (CDH23 antisense RNA 1)

CDH23-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -7 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.095492005).

BS1

Variant frequency is greater than expected in population nfe. GnomAdExome4 allele frequency = 0.000562 (822/1461364) while in subpopulation NFE AF = 0.000668 (743/1111638). AF 95% confidence interval is 0.000629. There are 2 homozygotes in GnomAdExome4. There are 404 alleles in the male GnomAdExome4 subpopulation. Median coverage is 40. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CDH23	NM_022124.6 link	c.385G>A	p.Ala129Thr	missense_variant	Exon 6 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.385G>A	p.Ala129Thr	missense_variant	Exon 6 of 70	5	NM_022124.6	ENSP00000224721.9		Q9H251-1

Frequencies

GnomAD3 genomes

AF:

0.000276

AC:

AN:

152142

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000266

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000426

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000241

AC:

AN:

249268

AF XY:

0.000222

show subpopulations

Gnomad AFR exome

AF:

0.000129

Gnomad AMR exome

AF:

0.0000869

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000345

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.000562

AC:

822

AN:

1461364

Hom.:

Cov.:

AF XY:

0.000556

AC XY:

404

AN XY:

726976

show subpopulations

African (AFR)

AF:

0.0000896

AC:

AN:

33464

American (AMR)

AF:

0.0000671

AC:

AN:

44696

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39686

South Asian (SAS)

AF:

0.000475

AC:

AN:

86240

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53392

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.000668

AC:

743

AN:

1111638

Other (OTH)

AF:

0.000514

AC:

AN:

60362

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

142

189

236

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

102

136

170

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000276

AC:

AN:

152260

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74436

show subpopulations

African (AFR)

AF:

0.000265

AC:

AN:

41552

American (AMR)

AF:

0.0000653

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.000207

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000426

AC:

AN:

68010

Other (OTH)

AF:

0.00

AC:

AN:

2106

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000376

Hom.:

Bravo

AF:

0.000246

TwinsUK

AF:

0.00108

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000838

AC:

ExAC

AF:

0.000248

AC:

EpiCase

AF:

0.000436

EpiControl

AF:

0.000652

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Aug 04, 2021

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Oct 13, 2022

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 threonine, which is neutral and polar, at codon 129 of the CDH23 protein (p.Ala129Thr). This variant is present in population databases (rs200328570, gnomAD 0.05%). This variant has not been reported in the literature in individuals affected with CDH23-related conditions. ClinVar contains an entry for this variant (Variation ID: 178293). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt 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. -

Sep 22, 2015

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Uncertain:1

Aug 10, 2017

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.Ala129Thr variant in CDH23 has been previously identified by our laborator y in 4 individuals with hearing loss; however, a variant affecting the remaining copy of CDH23 was not identified in any of these individuals and one had an alt ernate genetic etiology. This variant has been identified in 0.05% (15/30782) of South Asian chromosomes and 0.04% (47/126656) of European chromosomes by the Ge nome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; dbSNP rs200 328570); however, this frequency is not high enough to rule out a pathogenic rol e. Computational prediction tools do not provide strong support for or against a n impact to the protein. In summary, the clinical significance of the p.Ala129Th r variant is uncertain. -

CDH23-related disorder

Uncertain:1

Sep 23, 2024

PreventionGenetics, part of Exact Sciences

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

The CDH23 c.385G>A variant is predicted to result in the amino acid substitution p.Ala129Thr. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.049% of alleles in individuals of South Asian descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Inborn genetic diseases

Uncertain:1

Jan 22, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.385G>A (p.A129T) alteration is located in exon 6 (coding exon 5) of the CDH23 gene. This alteration results from a G to A substitution at nucleotide position 385, causing the alanine (A) at amino acid position 129 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

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

0.078

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.42

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.014

T;T;T;.;.;.;T;.;.

Eigen

Uncertain

0.24

Eigen_PC

Uncertain

0.31

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.87

D;D;D;D;D;D;D;D;T

M_CAP

Benign

0.020

MetaRNN

Benign

0.095

T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

2.0

.;.;M;M;.;.;.;.;.

PhyloP100

4.3

PrimateAI

Uncertain

0.65

PROVEAN

Benign

-1.9

N;.;N;.;N;.;.;.;.

REVEL

Benign

0.13

Sift

Benign

0.12

T;.;D;.;T;.;.;.;.

Sift4G

Uncertain

0.0080

D;D;D;T;D;T;D;.;.

Polyphen

1.0, 0.37

.;.;D;B;.;.;.;.;.

Vest4

0.33

MVP

0.65

ClinPred

0.19

GERP RS

5.6

PromoterAI

0.014

Neutral

(source)

Varity_R

0.16

gMVP

0.26

Mutation Taster

=45/55

disease causing

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over