rs772995621

Positions:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM1BP4_Moderate

The NM_022124.6(CDH23):c.499G>A(p.Val167Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000279 in 1,613,746 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. V167A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000027 ( 0 hom. )

Consequence

CDH23
NM_022124.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 7.60

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 Uncertain_significance. Variant got 0 ACMG points.

PM1

In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 5 uncertain in NM_022124.6

BP4

Computational evidence support a benign effect (MetaRNN=0.24604192).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CDH23	NM_022124.6 linkuse as main transcript	c.499G>A	p.Val167Ile	missense_variant	7/70	ENST00000224721.12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CDH23	ENST00000224721.12 linkuse as main transcript	c.499G>A	p.Val167Ile	missense_variant	7/70	5	NM_022124.6	P1	Q9H251-1

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152210

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.00

GnomAD3 exomes

AF:

0.0000161

AC:

AN:

248922

Hom.:

AF XY:

0.0000222

AC XY:

AN XY:

135052

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000266

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000267

AC:

AN:

1461536

Hom.:

Cov.:

AF XY:

0.0000206

AC XY:

AN XY:

727016

show subpopulations

Gnomad4 AFR exome

AF:

0.000209

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152210

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74360

show subpopulations

Gnomad4 AFR

AF:

0.0000724

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000966

Hom.:

Bravo

AF:

0.0000756

ExAC

AF:

0.0000248

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Nov 15, 2017

The p.Val167Ile variant in CDH23 has not been previously reported in individuals with hearing loss or Usher syndrome, but has been identified in 4/126512 Europe an chromosomes by the Genome Aggregation Database (gnomAD, http://gnomad.broadin stitute.org; dbSNP rs772995621). Although this variant has been seen in the gene ral population, its frequency is not high enough to rule out a pathogenic role. Computational prediction tools and conservation analyses do not provide strong s upport for or against an impact to the protein. In summary, the clinical signifi cance of the p.Val167Ile variant is uncertain. ACMG/AMP Criteria applied: PM2. -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 25, 2022

The c.499G>A (p.V167I) alteration is located in exon 7 (coding exon 6) of the CDH23 gene. This alteration results from a G to A substitution at nucleotide position 499, causing the valine (V) at amino acid position 167 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Usher syndrome type 1

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Natera, Inc.

Apr 11, 2020

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jun 20, 2022

This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 167 of the CDH23 protein (p.Val167Ile). This variant is present in population databases (rs772995621, gnomAD 0.006%). 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: 517628). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C0"). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.42

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.0050

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

Eigen

Uncertain

0.32

Eigen_PC

Uncertain

0.39

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.89

D;D;D;D;D;D;D;D;D

M_CAP

Benign

0.049

MetaRNN

Benign

0.25

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

MetaSVM

Benign

-0.54

MutationAssessor

Benign

-0.10

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

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.62

PROVEAN

Benign

-0.67

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

REVEL

Benign

0.15

Sift

Benign

0.12

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

Sift4G

Benign

0.093

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

Polyphen

0.77, 1.0

.;.;P;D;.;.;.;.;.

Vest4

0.39

MVP

0.56

ClinPred

0.53

GERP RS

5.3

Varity_R

0.16

gMVP

0.072

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