rs786200928

Positions:

• chr1-215891198-T-C

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PM2 PP3 PP5_Very_Strong

The NM_206933.4(USH2A):​c.7595-2144A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000591 in 152,338 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 Likely pathogenic (★★).

• Frequency: Genomes: 𝑓 0.000059 (0 hom., cov: 32)
• Consequence: USH2A NM_206933.4 intron
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:23 O:1
• Conservation: PhyloP100: 1.94

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]

(HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 11 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant 1-215891198-T-C is Pathogenic according to our data. Variant chr1-215891198-T-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 30722.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-215891198-T-C is described in Lovd as [Pathogenic]. Variant chr1-215891198-T-C is described in Lovd as [Pathogenic]. Variant chr1-215891198-T-C is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
USH2A	NM_206933.4	c.7595-2144A>G		intron_variant		ENST00000307340.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
USH2A	ENST00000307340.8	c.7595-2144A>G		intron_variant		1	NM_206933.4	P1
	ENST00000414995.1	n.60+4557T>C		intron_variant, non_coding_transcript_variant		3
USH2A	ENST00000674083.1	c.7595-2144A>G		intron_variant

Frequencies

GnomAD3 genomes AF: 0.0000591 AC: 9 AN: 152220 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.000576

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000735

Gnomad OTH AF: 0.00

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0000591 AC: 9 AN: 152338 Hom.: 0 Cov.: 32 AF XY: 0.0000537 AC XY: 4 AN XY: 74488

Gnomad4 AFR AF: 0.0000240

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.000576

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000735

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000214 Hom.: 0

Bravo AF: 0.0000680

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:23 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:7

Pathogenic, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	Institute of Medical Genetics and Applied Genomics, University Hospital Tübingen	Oct 23, 2020	- -
Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Jan 08, 2024	This sequence change falls in intron 40 of the USH2A gene. It does not directly change the encoded amino acid sequence of the USH2A protein. RNA analysis indicates that this variant induces altered splicing and may result in an absent or disrupted protein product. This variant is present in population databases (rs786200928, gnomAD 0.007%). This variant has been observed in individual(s) with Usher syndrome (PMID: 22009552, 23924366). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 30722). Studies have shown that this variant results in an insertion of 152bp at the junction of exons 40 and 41 and introduces a premature termination codon (PMID: 22009552). The resulting mRNA is expected to undergo nonsense-mediated decay. For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Mar 07, 2022	Observed with a second USH2A variant in multiple individuals with Usher syndrome in the published literature, however, the phase of these variants is unknown (Sodi et al., 2018; Khalaileh et al., 2018; Steele-Stallard et al., 2013); Non-canonical splice site variant demonstrated to result in loss-of-function; functional studies demonstrated an insertion of 152 bp at the junction of exons 40 and 41, leading to an out-of-frame protein with premature stop codon in exon 41 (designated p.K2532TfsX56) (Vache et al., 2012; Steele-Stallard et al., 2013); This variant is associated with the following publications: (PMID: 25404053, 33576794, 31980526, 31456290, 32581362, 31231422, 30718709, 26629787, 23924366, 30281416, 27802265, 25649381, 25823529, 28041643, 22009552, 25352746, 29490346, 25558175, 27460420, 32037395) -
Pathogenic, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	May 01, 2019	- -
Pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	May 14, 2021	- -

Usher syndrome type 2A Pathogenic:4

Pathogenic, no assertion criteria provided	literature only	OMIM	Jan 01, 2012	- -
Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Sep 16, 2020	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Genomics England Pilot Project, Genomics England	-	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Apr 11, 2023	- -

Usher syndrome Pathogenic:3

Pathogenic, no assertion criteria provided	research	Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet	Apr 01, 2018	- -
Pathogenic, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Oct 30, 2020	Variant summary: USH2A c.7595-2144A>G is reported in the literature to induce activation of a pseudoexon, predicted to result in a frameshift of the protein (e.g. Vache_2011). Several computational tools predict a significant impact on normal splicing: Four predict that the variant creates a new 5' donor site. The variant allele was found at a frequency of 6.4e-05 in 31406 control chromosomes. c.7595-2144A>G has been reported in the literature in multiple individuals affected with Usher Syndrome, including evidence for cosegregation with disease in several families (e.g. Vache_2011, Steele-Stallard_2013). These data indicate that the variant is very likely to be associated with disease. At least one publication reports experimental evidence that this variant activates a pseudoexon, resulting in aberrant splicing (e.g. Vache_2011). Seven clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories cited the variant as pathogenic/likely pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -
Likely pathogenic, no assertion criteria provided	research	NIHR Bioresource Rare Diseases, University of Cambridge	Jan 01, 2015	- -

Retinitis pigmentosa 39 Pathogenic:3

Likely pathogenic, criteria provided, single submitter	research	Ocular Genomics Institute, Massachusetts Eye and Ear	Apr 08, 2021	The USH2A c.7595-2144A>G variant was identified in an individual with retinitis pigmentosa with a presumed recessive inheritance pattern. Through a review of available evidence we were able to apply the following criteria: PM2, PM3, PP1, PP3. Based on this evidence we have classified this variant as Likely Pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Mar 19, 2024	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Apr 11, 2023	- -

USH2A-related disorder Pathogenic:1 Other:1

Pathogenic, criteria provided, single submitter	clinical testing	Variantyx, Inc.	Nov 07, 2022	This is a non-canonical splice variant in the USH2A gene (OMIM 608400). Pathogenic variants in this gene have been associated with autosomal recessive USH2A-related disorders. This variant causes a splicing defect that results in retention of a 152-bp intronic segment at the junction of exons 40 and 41 (PMID: 22009552). This event introduces a premature stop codon and results in loss of function, which is a known disease mechanism for USH2A (PMID: 20507924) (PVS1). This variant has been observed in the homozygous or compound heterozygous state in several affected individuals, including evidence of segregation with disease in at least two families (PMID: 22009552, 23924366) (PP1_Moderate). This variant has a 0.01928% maximum allele frequency in non-founder control populations (https://gnomad.broadinstitute.org/), which is lower than expected for the prevalence of USH2A-related disease (PM2_Supporting). Based on current evidence, this variant is classified as pathogenic for autosomal recessive USH2A-related disorders. -
not provided, no classification provided	phenotyping only	GenomeConnect, ClinGen	-	Variant interpreted as Pathogenic and reported on 06-28-2019 by Lab or GTR ID 500188. GenomeConnect assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. GenomeConnect staff make no attempt to reinterpret the clinical significance of the variant. -

Usher syndrome type 2 Pathogenic:1

Pathogenic, no assertion criteria provided

research

Sharon lab, Hadassah-Hebrew University Medical Center

Jun 23, 2019

- -

Usher syndrome type 2A;C3151138:Retinitis pigmentosa 39 Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Counsyl

Apr 28, 2017

- -

Rare genetic deafness Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Nov 07, 2017

7595-2144A>G variant in USH2A has been reported in 9 individuals with USH2A in compound heterozygous state with another pathogenic USH2A allele, of which 6 were confirmed to occur in trans, segregated in 6 affected relatives and absent from 518 control chromosomes (Vache 2012). RNA samples from these patients showed abnormal splicing predicted to lead to an abnormal or absent protein. In summary, this variant meets our criteria to be classified as pathogenic (http://pcpgm.partners.org/LMM) based upon segregation studies, low frequency in the general population, and observed deleterious impact on splicing. -

Retinal dystrophy Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Blueprint Genetics

Mar 18, 2019

- -

Retinitis pigmentosa Pathogenic:1

Pathogenic, no assertion criteria provided

research

Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet

Apr 01, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.39
CADD	Pathogenic	29
DANN	Benign	0.89

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.69		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.69		Position offset: 1

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs786200928; hg19: chr1-216064540;