rs368986242

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM1BP4_StrongBP6

The NM_206933.4(USH2A):c.997T>C(p.Ser333Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000409 in 1,613,958 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000039 ( 0 hom. )

Consequence

USH2A
NM_206933.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:5B:2

Conservation

PhyloP100: 1.10

Publications

6 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: Likely_benign. The variant received -3 ACMG points.

PM1

In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_206933.4

BP4

Computational evidence support a benign effect (MetaRNN=0.06496236).

BP6

Variant 1-216325451-A-G is Benign according to our data. Variant chr1-216325451-A-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 550610.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
USH2A	NM_206933.4 link	c.997T>C	p.Ser333Pro	missense_variant	Exon 6 of 72	ENST00000307340.8	NP_996816.3	O75445-1
USH2A	NM_007123.6 link	c.997T>C	p.Ser333Pro	missense_variant	Exon 6 of 21		NP_009054.6	O75445-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
USH2A	ENST00000307340.8 link	c.997T>C	p.Ser333Pro	missense_variant	Exon 6 of 72	1	NM_206933.4	ENSP00000305941.3	O75445-1
USH2A	ENST00000366942.3 link	c.997T>C	p.Ser333Pro	missense_variant	Exon 6 of 21	1		ENSP00000355909.3	O75445-2
USH2A	ENST00000674083.1 link	c.997T>C	p.Ser333Pro	missense_variant	Exon 6 of 73			ENSP00000501296.1	O75445-3

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00135

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000139

AC:

AN:

250972

AF XY:

0.000155

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00174

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000390

AC:

AN:

1461672

Hom.:

Cov.:

AF XY:

0.0000468

AC XY:

AN XY:

727136

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33466

American (AMR)

AF:

0.00

AC:

AN:

44686

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.000908

AC:

AN:

39666

South Asian (SAS)

AF:

0.000104

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1111904

Other (OTH)

AF:

0.000149

AC:

AN:

60382

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

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:

0.0000591

AC:

AN:

152286

Hom.:

Cov.:

AF XY:

0.0000940

AC XY:

AN XY:

74446

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41576

American (AMR)

AF:

0.0000654

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00136

AC:

AN:

5162

South Asian (SAS)

AF:

0.000207

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.464

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000680

ExAC

AF:

0.0000988

AC:

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:5Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Retinal dystrophy

Uncertain:2

Oct 22, 2017

Blueprint Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Oct 01, 2023

Dept Of Ophthalmology, Nagoya University

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:research

- -

Usher syndrome type 2A;C3151138:Retinitis pigmentosa 39

Uncertain:1

Feb 07, 2017

Counsyl

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

Retinitis pigmentosa 39

Uncertain:1

Jun 01, 2025

Baylor Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant has been reported in conjunction with another variant in individuals with retinitis pigmentosa (PMID: 24938718, 33090715), but it is also known to sometimes co-occur in cis with a pathogenic nonsense variant (PMID: 30390381, Internal data). -

USH2A-related disorder

Uncertain:1

May 08, 2023

PreventionGenetics, part of Exact Sciences

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The USH2A c.997T>C variant is predicted to result in the amino acid substitution p.Ser333Pro. This variant along with a splice site variant has been reported in a patient with retinitis pigmentosa (Xu et al. 2014. PMID: 24938718), in a patient with Usher syndrome in trans to a missense and in cis to a truncating variant (Kuang et al. 2018. PubMed ID: 30390381), and in additional patients with retinitis pigmentosa or hearing loss (Table S2, Liu et al. 2020. PubMed ID: 33090715; Liu et al. 2022. PubMed ID: 35106950). This variant is reported in 0.17% of alleles in individuals of East Asian descent in gnomAD (http://gnomad.broadinstitute.org/variant/1-216498793-A-G). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

not specified

Benign:1

Apr 11, 2022

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: USH2A c.997T>C (p.Ser333Pro) results in a non-conservative amino acid change located in the Laminin, N-terminal domain (IPR008211) of the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00014 in 250972 control chromosomes, predominantly at a frequency of 0.0017 within the East Asian subpopulation in the gnomAD database. This frequency is not significantly higher than estimated for a pathogenic variant in USH2A causing Usher Syndrome (0.00014 vs 0.011), allowing no conclusion about variant significance. c.997T>C has been reported in the literature as a non-informative genotype in multiple individuals of East Asian ethnicity undergoing genetic evaluations for retinitis pigmentosa and/or hearing loss/Usher syndrome (example, Liu_2012, Zu_2014, Kuang_2020, Zhu_2021, Liu_2022). One of these families demonstrated the segregation of a variant in a different gene (SNRNP200) as the cause of autosomal dominant retinitis pigmentosa and called this variant as a "false heterozygous" (Liu_2012) (ACMG BP5). These report(s) do not provide unequivocal conclusions about association of the variant with Usher Syndrome. At-least two reports of co-occurrence in cis with another pathogenic variant have been reported (USH2A c.2187C>A, p.Cys729*), providing supporting evidence for a benign role (Kuang_2021, Zhu_2021) (ACMG BP2). To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Two clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as likely benign. -

not provided

Benign:1

Jan 21, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.082

BayesDel_addAF

Benign

-0.55

BayesDel_noAF

Benign

-0.59

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.079

T;.

Eigen

Benign

-0.70

Eigen_PC

Benign

-0.85

FATHMM_MKL

Benign

0.10

LIST_S2

Benign

0.63

T;T

M_CAP

Uncertain

0.21

MetaRNN

Benign

0.065

T;T

MetaSVM

Benign

-0.98

MutationAssessor

Uncertain

2.2

M;M

PhyloP100

1.1

PrimateAI

Benign

0.26

PROVEAN

Benign

-1.2

N;N

REVEL

Uncertain

0.61

Sift

Benign

0.27

T;T

Sift4G

Uncertain

0.041

D;T

Polyphen

0.92

P;P

Vest4

0.67

MutPred

0.44

Loss of phosphorylation at S333 (P = 0.0442);Loss of phosphorylation at S333 (P = 0.0442);

MVP

0.79

MPC

0.16

ClinPred

0.12

GERP RS

-1.0

Varity_R

0.19

gMVP

0.78

Mutation Taster

=4/96

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over