1-215650648-C-T

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 20 ACMG points: 20P and 0B. PS1PM1PM2PM5PP3_ModeratePP5_Very_Strong

The NM_206933.4(USH2A):c.14287G>A(p.Gly4763Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000479 in 1,461,884 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Pathogenic in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G4763E) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000048 ( 0 hom. )

Consequence

USH2A
NM_206933.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:8U:1

Conservation

PhyloP100: 7.88

Variant links:

Genes affected

USH2A (HGNC:12601): (usherin) This gene encodes a protein that contains laminin EGF motifs, a pentaxin domain, and many fibronectin type III motifs. The protein is found in the basement membrane, and may be important in development and homeostasis of the inner ear and retina. Mutations within this gene have been associated with Usher syndrome type IIa and retinitis pigmentosa. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2008]

USH2A links:

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ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 20 ACMG points.

PS1

Transcript NM_206933.4 (USH2A) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar as 1457114

PM1

In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 3 benign, 5 uncertain in NM_206933.4

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr1-215650647-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 1047575.Status of the report is criteria_provided_single_submitter, 1 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.922

PP5

Variant 1-215650648-C-T is Pathogenic according to our data. Variant chr1-215650648-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 48433.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-215650648-C-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
USH2A	NM_206933.4 link	c.14287G>A	p.Gly4763Arg	missense_variant	Exon 65 of 72	ENST00000307340.8	NP_996816.3	O75445-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
USH2A	ENST00000307340.8 link	c.14287G>A	p.Gly4763Arg	missense_variant	Exon 65 of 72	1	NM_206933.4	ENSP00000305941.3		O75445-1
USH2A	ENST00000674083.1 link	c.14287G>A	p.Gly4763Arg	missense_variant	Exon 65 of 73			ENSP00000501296.1		O75445-3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000479

AC:

AN:

1461884

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727242

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000540

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:8Uncertain:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Retinitis pigmentosa 39

Pathogenic:3

Feb 05, 2025

SingHealth Duke-NUS Institute of Precision Medicine

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Another variant with the same amino acid change has been classified as pathogenic/likely pathogenic (PS1, p.Gly4763Arg). Variant is located in a mutational hotspot where >50% of variants are pathogenic (PM1). Variant is not found in gnomAD genomes and homozygous allele count in gnomAD exomes is less than 0 (PM2). Other variants at this amino acid residue have been classified as pathogenic/likely pathogenic (PM5, p.Gly4763Glu; p.Gly4763Val) -

Nov 04, 2023

Genome-Nilou Lab

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 22, 2024

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Usher syndrome type 2A

Pathogenic:2

Oct 28, 2019

Centre for Mendelian Genomics, University Medical Centre Ljubljana

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was classified as: Likely pathogenic. The following ACMG criteria were applied in classifying this variant: PS1,PM2,PP3. -

Nov 04, 2023

Genome-Nilou Lab

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Usher syndrome type 2A;C3151138:Retinitis pigmentosa 39

Pathogenic:1

Oct 09, 2017

Counsyl

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Pathogenic:1

Feb 29, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 4763 of the USH2A protein (p.Gly4763Arg). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with Usher syndrome (PMID: 25649381, 27460420). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 48433). 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. -

Rare genetic deafness

Pathogenic:1

Sep 27, 2010

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The Gly4763Arg variant in USH2A has been reported in an individual with Usher sy ndrome and in an individual with nonsyndromic retinitis pigmentosa (McGee 2010). In addition, this residue is conserved in mammals. Furthermore, we have identif ied the Gly4763Arg variant in combination with a pathogenic USH2A variant in two siblings with Usher syndrome. In summary, this variant is likely to be pathogen ic. -

Retinal dystrophy

Uncertain:1

Oct 01, 2023

Dept Of Ophthalmology, Nagoya University

Significance: Uncertain significance

Review Status: flagged submission

Collection Method: research

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.83

BayesDel_addAF

Pathogenic

0.35

BayesDel_noAF

Pathogenic

0.26

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.54

Eigen

Pathogenic

0.77

Eigen_PC

Uncertain

0.66

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.88

M_CAP

Uncertain

0.22

MetaRNN

Pathogenic

0.92

MetaSVM

Uncertain

0.0023

MutationAssessor

Pathogenic

3.5

PrimateAI

Uncertain

0.52

PROVEAN

Pathogenic

-5.1

REVEL

Uncertain

0.64

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.94

MutPred

0.56

Gain of MoRF binding (P = 0.0184);

MVP

0.97

MPC

0.25

ClinPred

1.0

GERP RS

5.7

Varity_R

0.44

gMVP

0.94

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