rs552906420

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 0P and 3B. BP4_ModerateBS1_Supporting

The NM_022124.6(CDH23):c.1581G>T(p.Gln527His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000639 in 1,612,322 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00014 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000055 ( 0 hom. )

Consequence

CDH23
NM_022124.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: 0.556

Publications

2 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 Gene-Disease associations (from GenCC):

autosomal recessive nonsyndromic hearing loss 12
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, PanelApp Australia
nonsyndromic genetic hearing loss
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
Usher syndrome type 1
Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
Usher syndrome type 1D
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), PanelApp Australia
hearing loss, autosomal recessive
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

CDH23 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.120747775).

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.000144 (22/152286) while in subpopulation AMR AF = 0.00111 (17/15294). AF 95% confidence interval is 0.000707. There are 0 homozygotes in GnomAd4. There are 13 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CDH23	NM_022124.6 link	c.1581G>T	p.Gln527His	missense_variant	Exon 16 of 70	ENST00000224721.12	NP_071407.4	Q9H251-1Q6P152
CDH23	NM_001171930.2 link	c.1581G>T	p.Gln527His	missense_variant	Exon 16 of 32		NP_001165401.1	Q9H251A0A087WYR8Q6P152
CDH23	NM_001171931.2 link	c.1581G>T	p.Gln527His	missense_variant	Exon 16 of 26		NP_001165402.1	Q9H251Q8N5B3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CDH23	ENST00000224721.12 link	c.1581G>T	p.Gln527His	missense_variant	Exon 16 of 70	5	NM_022124.6	ENSP00000224721.9		Q9H251-1

Frequencies

GnomAD3 genomes

AF:

0.000145

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00111

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.000957

GnomAD2 exomes

AF:

0.0000611

AC:

AN:

245482

AF XY:

0.0000750

show subpopulations

Gnomad AFR exome

AF:

0.0000677

Gnomad AMR exome

AF:

0.000146

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000807

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000555

AC:

AN:

1460036

Hom.:

Cov.:

AF XY:

0.0000647

AC XY:

AN XY:

726026

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33446

American (AMR)

AF:

0.000314

AC:

AN:

44544

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26068

East Asian (EAS)

AF:

0.00

AC:

AN:

39678

South Asian (SAS)

AF:

0.00

AC:

AN:

85540

European-Finnish (FIN)

AF:

0.0000188

AC:

AN:

53210

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000522

AC:

AN:

1111444

Other (OTH)

AF:

0.000116

AC:

AN:

60338

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.000144

AC:

AN:

152286

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

AN XY:

74458

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41560

American (AMR)

AF:

0.00111

AC:

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68026

Other (OTH)

AF:

0.000947

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

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:

0.0000654

Hom.:

Bravo

AF:

0.000427

ExAC

AF:

0.0000578

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000595

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Jul 28, 2025

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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

Sep 23, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces glutamine, which is neutral and polar, with histidine, which is basic and polar, at codon 527 of the CDH23 protein (p.Gln527His). This variant is present in population databases (rs552906420, gnomAD 0.01%). 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: 505043). 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. -

not specified

Uncertain:1

Jun 20, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.Gln527His variant in CDH23 has not been previously reported in individuals with hearing loss or Usher syndrome. This variant has been identified in 4/5525 2 European chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.br oadinstitute.org; dbSNP rs552906420). Although this variant has been seen in the general population, its frequency is not high enough to rule out a pathogenic r ole. Computational prediction tools and conservation analyses do not provide str ong support for or against an impact to the protein. In summary, the clinical si gnificance of the p.Gln527His variant is uncertain. -

Inborn genetic diseases

Uncertain:1

Jun 23, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1581G>T (p.Q527H) alteration is located in exon 16 (coding exon 15) of the CDH23 gene. This alteration results from a G to T substitution at nucleotide position 1581, causing the glutamine (Q) at amino acid position 527 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Usher syndrome type 1

Uncertain:1

Oct 28, 2019

Natera, Inc.

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.28

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.37

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.030

T;T;T;.;T;.

Eigen

Uncertain

0.27

Eigen_PC

Uncertain

0.24

FATHMM_MKL

Uncertain

0.84

LIST_S2

Uncertain

0.93

D;D;D;D;D;D

M_CAP

Benign

0.011

MetaRNN

Benign

0.12

T;T;T;T;T;T

MetaSVM

Benign

-0.71

MutationAssessor

Benign

0.85

.;.;L;.;.;.

PhyloP100

0.56

PrimateAI

Uncertain

0.57

REVEL

Benign

0.17

Sift4G

Uncertain

0.047

D;D;.;T;D;.

Polyphen

0.92

.;.;P;.;.;.

Vest4

0.55

MutPred

0.49

Gain of catalytic residue at E524 (P = 0.2055);Gain of catalytic residue at E524 (P = 0.2055);Gain of catalytic residue at E524 (P = 0.2055);Gain of catalytic residue at E524 (P = 0.2055);Gain of catalytic residue at E524 (P = 0.2055);Gain of catalytic residue at E524 (P = 0.2055);

MVP

0.75

ClinPred

0.13

GERP RS

2.7

Varity_R

0.13

gMVP

0.56

Mutation Taster

=68/32

polymorphism

(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

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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