1-216250989-C-T
Variant summary
Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PP3PP4PM5PM2_SupportingPM3_Strong
This summary comes from the ClinGen Evidence Repository: The c.2081G>A in USH2A is a missense variant predicted to cause substitution of cysteine to tyrosine at amino acid 694 (p.Cys694Tyr). The highest population minor allele frequency in gnomAD v2.1.1 is 0.002% (2/113290) in the European (non-Finnish) sub-population which is below the threshold defined by the ClinGen Hearing Loss Expert Panel for autosomal recessive Usher syndrome (PM2_Supporting). The REVEL computational prediction analysis tool produced a score of 0.92 (PP3). This variant has been detected in at least three probands with Usher syndrome whereby pathogenic or suspected-pathogenic variants were confirmed in trans in two individuals (2.5 PM3_Strong points; PMID:28041643, Invitae Internal Data (SCV001372551.2)). Of the confirmed phase counts, the first harbored the p.Glu767SerfsTer21 variant and second harbored the p.Thr4425Met variant in USH2A (PMID:28041643, Invitae Internal Data). The third individual harbored the p.Cys3267Arg variant but phasing was not confirmed (Invitae Internal Data). At least one proband displayed features of hearing loss and retinitis pigmentosa, which is highly specific for USH2A and Usher syndrome (PP4; PMID:28041643). Two missense variants, c.2081G>C (p.Cys694Ser) and c.2080T>A (p.Cys694Ser), in the same codon have been classified as likely pathogenic or pathogenic for AR Usher syndrome by two submitters in ClinVar (PM5; ClinVar Variation ID:1217348, 813246). In summary, this variant meets the criteria to be classified as likely pathogenic for AR Usher syndrome based on ACMG/AMP criteria applied, as specified by the ClinGen Hearing Loss VCEP; PM2_Supporting, PP3, PM3_Strong, PP4, PM5. (The ClinGen Hearing Loss VCEP Specifications Version 2; 06/27/2023). LINK:https://erepo.genome.network/evrepo/ui/classification/CA1396311/MONDO:0019501/005
Frequency
Consequence
NM_206933.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_pathogenic. Variant got 9 ACMG points.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
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USH2A | ENST00000307340.8 | c.2081G>A | p.Cys694Tyr | missense_variant | Exon 12 of 72 | 1 | NM_206933.4 | ENSP00000305941.3 | ||
USH2A | ENST00000366942.3 | c.2081G>A | p.Cys694Tyr | missense_variant | Exon 12 of 21 | 1 | ENSP00000355909.3 | |||
USH2A | ENST00000674083.1 | c.2081G>A | p.Cys694Tyr | missense_variant | Exon 12 of 73 | ENSP00000501296.1 |
Frequencies
GnomAD3 genomes AF: 0.0000197 AC: 3AN: 152162Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.00000797 AC: 2AN: 250854Hom.: 0 AF XY: 0.0000148 AC XY: 2AN XY: 135552
GnomAD4 exome AF: 0.0000212 AC: 31AN: 1461764Hom.: 0 Cov.: 32 AF XY: 0.0000193 AC XY: 14AN XY: 727184
GnomAD4 genome AF: 0.0000197 AC: 3AN: 152162Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2AN XY: 74304
ClinVar
Submissions by phenotype
not provided Pathogenic:1Uncertain:4
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This sequence change replaces cysteine, which is neutral and slightly polar, with tyrosine, which is neutral and polar, at codon 694 of the USH2A protein (p.Cys694Tyr). This variant is present in population databases (rs137954284, gnomAD 0.002%). This missense change has been observed in individual(s) with USH2A-related conditions (PMID: 20591486, 28041643; Invitae). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 418533). 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 expected to disrupt USH2A protein function with a positive predictive value of 95%. For these reasons, this variant has been classified as Pathogenic. -
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Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 32581362, 20591486, 28041643) -
Usher syndrome Pathogenic:3
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The c.2081G>A in USH2A is a missense variant predicted to cause substitution of cysteine to tyrosine at amino acid 694 (p.Cys694Tyr). The highest population minor allele frequency in gnomAD v2.1.1 is 0.002% (2/113290) in the European (non-Finnish) sub-population which is below the threshold defined by the ClinGen Hearing Loss Expert Panel for autosomal recessive Usher syndrome (PM2_Supporting). The REVEL computational prediction analysis tool produced a score of 0.92 (PP3). This variant has been detected in at least three probands with Usher syndrome whereby pathogenic or suspected-pathogenic variants were confirmed in trans in two individuals (2.5 PM3_Strong points; PMID:28041643, Invitae Internal Data (SCV001372551.2)). Of the confirmed phase counts, the first harbored the p.Glu767SerfsTer21 variant and second harbored the p.Thr4425Met variant in USH2A (PMID:28041643, Invitae Internal Data). The third individual harbored the p.Cys3267Arg variant but phasing was not confirmed (Invitae Internal Data). At least one proband displayed features of hearing loss and retinitis pigmentosa, which is highly specific for USH2A and Usher syndrome (PP4; PMID: 28041643). Two missense variants, c.2081G>C (p.Cys694Ser) and c.2080T>A (p.Cys694Ser), in the same codon have been classified as likely pathogenic or pathogenic for AR Usher syndrome by two submitters in ClinVar (PM5; ClinVar Variation ID:1217348, 813246). In summary, this variant meets the criteria to be classified as likely pathogenic for AR Usher syndrome based on ACMG/AMP criteria applied, as specified by the ClinGen Hearing Loss VCEP; PM2_Supporting, PP3, PM3_Strong, PP4, PM5. (The ClinGen Hearing Loss VCEP Specifications Version 2; 06/27/2023). -
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Usher syndrome type 2A;C3151138:Retinitis pigmentosa 39 Pathogenic:1
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Retinitis pigmentosa 39 Pathogenic:1
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Retinal dystrophy Pathogenic:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at