Genetic Variant CDH23:p.Thr1401Thr (chr10-71734338-C-T) – ACMG Classification: Benign (-14 pts)

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_StrongBP6BP7BS1BS2

The NM_022124.6(CDH23):c.4203C>T(p.Thr1401Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000864 in 1,606,092 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). The gene CDH23 is included in the ClinGen Criteria Specification Registry.

Frequency

Genomes: 𝑓 0.00075 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00088 ( 5 hom. )

Consequence

CDH23
NM_022124.6 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:5

Conservation

PhyloP100: -2.82

Publications

3 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:

C10orf105 (HGNC:20304): (chromosome 10 open reading frame 105) Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

C10orf105 links:

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ACMG classification

Specifications for CDH23 are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Classification was made for transcript

Our verdict: Benign. The variant received -14 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.53).

BP6

Variant 10-71734338-C-T is Benign according to our data. Variant chr10-71734338-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 178602.

BP7

Synonymous conserved (PhyloP=-2.82 with no splicing effect.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.000755 (115/152342) while in subpopulation EAS AF = 0.016 (83/5190). AF 95% confidence interval is 0.0132. There are 1 homozygotes in GnomAd4. There are 67 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 5 AR,Unknown gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_022124.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CDH23	NM_022124.6	MANE Select	c.4203C>T	p.Thr1401Thr	synonymous	Exon 33 of 70	NP_071407.4
	C10orf105	NM_001168390.2		c.-6+3390G>A		intron	N/A	NP_001161862.1	Q8TEF2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CDH23	ENST00000224721.12	TSL:5 MANE Select	c.4203C>T	p.Thr1401Thr	synonymous	Exon 33 of 70	ENSP00000224721.9	Q9H251-1
C10orf105	ENST00000398786.2	TSL:2	c.-6+3390G>A		intron	N/A	ENSP00000381766.3	Q8TEF2
CDH23	ENST00000398792.3	TSL:2	n.895C>T		non_coding_transcript_exon	Exon 5 of 9

Frequencies

GnomAD3 genomes

AF:

0.000755

AC:

115

AN:

152226

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.0160

Gnomad SAS

AF:

0.00207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000250

Gnomad OTH

AF:

0.000956

GnomAD2 exomes

AF:

0.00157

AC:

367

AN:

233568

AF XY:

0.00152

show subpopulations

Gnomad AFR exome

AF:

0.000143

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0159

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000266

Gnomad OTH exome

AF:

0.00105

GnomAD4 exome

AF:

0.000876

AC:

1273

AN:

1453750

Hom.:

Cov.:

AF XY:

0.000934

AC XY:

675

AN XY:

722406

show subpopulations

African (AFR)

AF:

0.0000899

AC:

AN:

33364

American (AMR)

AF:

0.0000458

AC:

AN:

43686

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25994

East Asian (EAS)

AF:

0.0153

AC:

600

AN:

39326

South Asian (SAS)

AF:

0.00249

AC:

211

AN:

84820

European-Finnish (FIN)

AF:

0.0000380

AC:

AN:

52574

Middle Eastern (MID)

AF:

0.000174

AC:

AN:

5754

European-Non Finnish (NFE)

AF:

0.000359

AC:

398

AN:

1108192

Other (OTH)

AF:

0.000933

AC:

AN:

60040

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

154

230

307

384

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

104

130

<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:

0.000755

AC:

115

AN:

152342

Hom.:

Cov.:

AF XY:

0.000900

AC XY:

AN XY:

74482

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41584

American (AMR)

AF:

0.000196

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.0160

AC:

AN:

5190

South Asian (SAS)

AF:

0.00207

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000250

AC:

AN:

68018

Other (OTH)

AF:

0.000946

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.518

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.000360

Hom.:

Bravo

AF:

0.000703

Asia WGS

AF:

0.00289

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (2)

Autosomal recessive nonsyndromic hearing loss 12 (1)

CDH23-related disorder (1)

not specified (1)

Usher syndrome type 1D (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.53

CADD

Benign

1.2

(source)

DANN

Benign

0.91

PhyloP100

-2.8

Mutation Taster

=98/2

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over