chr10-71805910-GGACTGGGA-G

Position:

• chr10-71805910-GGACTGGGA-G

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_022124.6(CDH23):​c.7979_7986del​(p.Asp2660ValfsTer55) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CDH23 NM_022124.6 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 9.88

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]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 10-71805910-GGACTGGGA-G is Pathogenic according to our data. Variant chr10-71805910-GGACTGGGA-G is described in ClinVar as [Pathogenic]. Clinvar id is 179282.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr10-71805910-GGACTGGGA-G is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CDH23	NM_022124.6	c.7979_7986del	p.Asp2660ValfsTer55	frameshift_variant	56/70	ENST00000224721.12
CDH23	NM_001171933.1	c.1259_1266del	p.Asp420ValfsTer55	frameshift_variant	9/23
CDH23	NM_001171934.1	c.1259_1266del	p.Asp420ValfsTer55	frameshift_variant	9/22

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CDH23	ENST00000224721.12	c.7979_7986del	p.Asp2660ValfsTer55	frameshift_variant	56/70	5	NM_022124.6	P1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Rare genetic deafness Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Oct 17, 2013

The Asp2660fs variant in CDH23 has not been reported in individuals with hearing loss or in large population studies. This frameshift variant is predicted to al ter the protein?s amino acid sequence beginning at position 2660 and lead to a p remature termination codon 55 amino acids downstream. This alteration is then pr edicted to lead to a truncated or absent protein. In summary, this variant meet s our criteria to be classified as pathogenic (http://pcpgm.partners.org/LMM). -

Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs727504761; hg19: chr10-73565667;