NM_206933.4(USH2A):c.820C>G (p.Arg274Gly) AND Usher syndrome type 2A

Germline classification:: Pathogenic (2 submissions)
Last evaluated:: Nov 4, 2023
Review status:: 2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV002470889.3

Allele description [Variation Report for NM_206933.4(USH2A):c.820C>G (p.Arg274Gly)]

NM_206933.4(USH2A):c.820C>G (p.Arg274Gly)

Gene:

USH2A:usherin [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

1q41

Genomic location:

Preferred name:

NM_206933.4(USH2A):c.820C>G (p.Arg274Gly)

HGVS:

NC_000001.11:g.216327619G>C
NG_009497.2:g.100830C>G
NM_007123.6:c.820C>G
NM_206933.4:c.820C>GMANE SELECT
NP_009054.6:p.Arg274Gly
NP_996816.3:p.Arg274Gly
NC_000001.10:g.216500961G>C
NG_009497.1:g.100778C>G
NM_206933.2:c.820C>G

Protein change:

R274G

Links:

dbSNP: rs397518036

NCBI 1000 Genomes Browser:

rs397518036

Molecular consequence:

NM_007123.6:c.820C>G - missense variant - [Sequence Ontology: SO:0001583]
NM_206933.4:c.820C>G - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Usher syndrome type 2A
Synonyms:: USHER SYNDROME, TYPE IIA; RETINAL DISEASE IN USHER SYNDROME TYPE IIA, MODIFIER OF
Identifiers:: MONDO: MONDO:0010169; MedGen: C1848634; Orphanet: 231178; Orphanet: 886; OMIM: 276901

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV002766880	Victorian Clinical Genetics Services, Murdoch Childrens Research Institute See additional submitters Shariant Australia, Australian Genomics	criteria provided, single submitter (ACMG Guidelines, 2015)	Pathogenic (Jul 17, 2023)	germline	clinical testing	PubMed (4) [See all records that cite these PMIDs] 27460420, 28041643, 28798898, 25741868
SCV004182946	Genome-Nilou Lab	criteria provided, single submitter (ACMG Guidelines, 2015)	Pathogenic (Nov 4, 2023)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV002766880

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

See additional submitters

criteria provided, single submitter

(ACMG Guidelines, 2015)

Pathogenic
(Jul 17, 2023)

germline

clinical testing

PubMed (4)
[See all records that cite these PMIDs]

SCV004182946

Genome-Nilou Lab

criteria provided, single submitter

(ACMG Guidelines, 2015)

Pathogenic
(Nov 4, 2023)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	yes	not provided	not provided	not provided	not provided	not provided	clinical testing
not provided	germline	no	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

An innovative strategy for the molecular diagnosis of Usher syndrome identifies causal biallelic mutations in 93% of European patients.

Bonnet C, Riahi Z, Chantot-Bastaraud S, Smagghe L, Letexier M, Marcaillou C, Lefèvre GM, Hardelin JP, El-Amraoui A, Singh-Estivalet A, Mohand-Saïd S, Kohl S, Kurtenbach A, Sliesoraityte I, Zobor D, Gherbi S, Testa F, Simonelli F, Banfi S, Fakin A, Glavač D, Jarc-Vidmar M, et al.

Eur J Hum Genet. 2016 Dec;24(12):1730-1738. doi: 10.1038/ejhg.2016.99. Epub 2016 Jul 27.

PubMed [citation]

PMID:: 27460420
PMCID:: PMC5117943

Comprehensive Rare Variant Analysis via Whole-Genome Sequencing to Determine the Molecular Pathology of Inherited Retinal Disease.

Carss KJ, Arno G, Erwood M, Stephens J, Sanchis-Juan A, Hull S, Megy K, Grozeva D, Dewhurst E, Malka S, Plagnol V, Penkett C, Stirrups K, Rizzo R, Wright G, Josifova D, Bitner-Glindzicz M, Scott RH, Clement E, Allen L, Armstrong R, Brady AF, et al.

Am J Hum Genet. 2017 Jan 5;100(1):75-90. doi: 10.1016/j.ajhg.2016.12.003. Epub 2016 Dec 29.

PubMed [citation]

PMID:: 28041643
PMCID:: PMC5223092

See all PubMed Citations (4)

Details of each submission

From Victorian Clinical Genetics Services, Murdoch Childrens Research Institute, SCV002766880.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (4)

Description

Based on the classification scheme VCGS_Germline_v1.3.4, this variant is classified as Pathogenic. Following criteria are met: 0102 - Loss of function is a known mechanism of disease in this gene and is associated with Usher syndrome type 2A (MIM#276901). (I) 0106 - This gene is associated with autosomal recessive disease. (I) 0200 - Variant is predicted to result in a missense amino acid change from arginine to glycine. (I) 0251 - This variant is heterozygous. (I) 0304 - Variant is present in gnomAD (v2) <0.01 for a recessive condition (2 heterozygotes, 0 homozygotes). (SP) 0309 - An alternative amino acid change at the same position has been observed in gnomAD (v2) (6 heterozygotes, 0 homozygotes). (I) 0502 - Missense variant with conflicting in silico predictions and uninformative conservation. (I) 0600 - Variant is located in the annotated Concanavalin A-like lectin/glucanases superfamily domain (DECIPHER). (I) 0704 - Another missense variant comparable to the one identified in this case has limited previous evidence for pathogenicity. p.(Arg274Gln) has been previously described as a variant of uncertain significance in multiple independent cases (ClinVar, PMIDs: 27460420, 28798898). (SP) 0803 - This variant has limited previous evidence of pathogenicity in unrelated individuals. This variant has been classified as pathogenic in an individual with Usher syndrome (PMID: 28041643). It has also been classified as a VUS by a clinical laboratory in ClinVar, however the description in the ClinVar entry is consistent with a variant of high clinical relevance. (SP) 0905 - No published segregation evidence has been identified for this variant. (I) 1007 - No published functional evidence has been identified for this variant. (I) 1201 - Heterozygous variant detected in trans with a pathogenic heterozygous variant (NM_206933.2(USH2A):c.1036A>C; p.(Asn346His)) in a recessive disease. (SP) 1206 - This variant has been shown to be paternally inherited. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	yes	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Genome-Nilou Lab, SCV004182946.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	no	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Sep 29, 2024

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