rs550772689

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received -2 ACMG points: 2P and 4B. PM3_SupportingBS1PP4

This summary comes from the ClinGen Evidence Repository: The c.6730G>A (p.Val2244Met) variant in USH2A is a missense variant predicted to cause a substitution of valine by methionine at amino acid 2244. The filtering allele frequency (the lower threshold of the 95% CI of 312/91082) of the c.6730G>A (p.Val2244Met) is 0.3112% for South Asian chromosomes by gnomAD v4.1.0, which meets the ClinGen Hearing Loss VCEP threshold (≥0.003) for BS1. The computational predictor REVEL gives a score of 0.28, which is neither above nor below the thresholds predicting a damaging or benign impact on USH2A function. This variant has been detected in at least one individual with Usher syndrome. This individual was compound heterozygous for the variant and a pathogenic or likely pathogenic variant with phase unknown (p.Leu4567Profs*16; PMID:27460420) (PM3_Supporting). At least one patient with this variant displayed retinitis pigmentosa and sensorineural bilateral hearing loss, which is highly specific for Usher syndrome (PP4; PMID:27460420). In summary, this variant meets the criteria to be classified as uncertain significance for autosomal recessive Usher syndrome, based on the ACMG/AMP criteria applied, as specified by the ClinGen Hearing Loss VCEP (BS1, PM3_Supporting, PP4; Version 2; 5/15/24). LINK:https://erepo.genome.network/evrepo/ui/classification/CA179542/MONDO:0019501/005

Frequency

Genomes: 𝑓 0.00013 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00023 ( 1 hom. )

Consequence

USH2A
NM_206933.4 missense

Scores

Clinical Significance

Uncertain significance reviewed by expert panel P:1U:13B:1

Conservation

PhyloP100: 1.67

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

Usher syndrome type 2
Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
Usher syndrome type 2A
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, PanelApp Australia, Labcorp Genetics (formerly Invitae)
retinitis pigmentosa 39
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
retinitis pigmentosa
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

USH2A links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received -2 ACMG points.

PM3

For more information check the summary or visit ClinGen Evidence Repository.

PP4

For more information check the summary or visit ClinGen Evidence Repository.

BS1

For more information check the summary or visit ClinGen Evidence Repository.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_206933.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	USH2A	NM_206933.4	MANE Select	c.6730G>A	p.Val2244Met	missense	Exon 35 of 72	NP_996816.3

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	USH2A	ENST00000307340.8	TSL:1 MANE Select	c.6730G>A	p.Val2244Met	missense	Exon 35 of 72	ENSP00000305941.3
	USH2A	ENST00000674083.1		c.6730G>A	p.Val2244Met	missense	Exon 35 of 73	ENSP00000501296.1

Frequencies

GnomAD3 genomes

AF:

0.000131

AC:

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000506

AC:

127

AN:

251106

AF XY:

0.000634

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000218

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000228

AC:

333

AN:

1461798

Hom.:

Cov.:

AF XY:

0.000308

AC XY:

224

AN XY:

727196

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33470

American (AMR)

AF:

0.00

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.000101

AC:

AN:

39686

South Asian (SAS)

AF:

0.00339

AC:

292

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.000520

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000630

AC:

AN:

1111962

Other (OTH)

AF:

0.000431

AC:

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

102

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

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

GnomAD4 genome

AF:

0.000131

AC:

AN:

152268

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

AN XY:

74424

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41556

American (AMR)

AF:

0.00

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5170

South Asian (SAS)

AF:

0.00415

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10604

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68020

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

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:

0.000114

Hom.:

Bravo

AF:

0.0000453

ExAC

AF:

0.000577

AC:

Asia WGS

AF:

0.00606

AC:

AN:

3478

ClinVar

ClinVar submissions as Germline

Significance:Uncertain significance

Revision:reviewed by expert panel

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (4)

Usher syndrome (2)

Usher syndrome type 2A (2)

Usher syndrome type 2A;C3151138:Retinitis pigmentosa 39 (2)

not specified (1)

Retinal dystrophy (1)

Retinitis pigmentosa (1)

Retinitis pigmentosa 39 (1)

USH2A-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.22

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.25

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.19

Eigen

Uncertain

0.36

Eigen_PC

Uncertain

0.26

FATHMM_MKL

Benign

0.71

LIST_S2

Benign

0.78

M_CAP

Pathogenic

0.73

MetaRNN

Benign

0.017

MetaSVM

Benign

-0.47

MutationAssessor

Pathogenic

3.2

PhyloP100

1.7

PrimateAI

Benign

0.37

PROVEAN

Benign

-2.0

REVEL

Benign

0.28

Sift

Uncertain

0.0070

Sift4G

Uncertain

0.0020

Polyphen

1.0

Vest4

0.36

MutPred

0.39

Loss of catalytic residue at V2244 (P = 0.0648)

MVP

0.69

MPC

0.13

ClinPred

0.28

GERP RS

4.0

Varity_R

0.085

gMVP

0.57

Mutation Taster

=27/73

disease causing

(source)

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

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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

ClinVar submissions as Germline

Computational scores

Splicing

Publications

Other links and lift over