rs368986242

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 4P and 4B. PM1PM2BP4_Strong

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

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM1

In a domain Laminin N-terminal (size 246) in uniprot entity USH2A_HUMAN there are 107 pathogenic changes around while only 18 benign (86%) in NM_206933.4

PM2

Very rare variant in population databases, with high coverage;

BP4

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
USH2A	NM_206933.4 linkuse as main transcript	c.997T>C	p.Ser333Pro	missense_variant	6/72	ENST00000307340.8
USH2A	NM_007123.6 linkuse as main transcript	c.997T>C	p.Ser333Pro	missense_variant	6/21

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
USH2A	ENST00000307340.8 linkuse as main transcript	c.997T>C	p.Ser333Pro	missense_variant	6/72	1	NM_206933.4	P1	O75445-1
USH2A	ENST00000366942.3 linkuse as main transcript	c.997T>C	p.Ser333Pro	missense_variant	6/21	1			O75445-2
USH2A	ENST00000674083.1 linkuse as main transcript	c.997T>C	p.Ser333Pro	missense_variant	6/73				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

GnomAD3 exomes

AF:

0.000139

AC:

AN:

250972

Hom.:

AF XY:

0.000155

AC XY:

AN XY:

135610

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 SAS exome

AF:

0.0000980

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

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000908

Gnomad4 SAS exome

AF:

0.000104

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.000149

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152286

Hom.:

Cov.:

AF XY:

0.0000940

AC XY:

AN XY:

74446

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00136

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

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

Uncertain significance, criteria provided, single submitter	clinical testing	Blueprint Genetics	Oct 22, 2017	- -
Uncertain significance, criteria provided, single submitter	research	Dept Of Ophthalmology, Nagoya University	Oct 01, 2023	- -

Usher syndrome type 2A;C3151138:Retinitis pigmentosa 39

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Counsyl

Feb 07, 2017

- -

Retinitis pigmentosa 39

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Baylor Genetics

Feb 05, 2024

- -

USH2A-related disorder

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

May 08, 2023

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

Likely benign, criteria provided, single submitter

clinical testing

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

Apr 11, 2022

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

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 27, 2024

- -

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

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

MutationTaster

Benign

1.0

N;N;N

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

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

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