rs727505337

Variant names:

• chr1-215743285-C-A
• rs727505337
• NM_206933.4:c.11440G>T

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_206933.4(USH2A):​c.11440G>T​(p.Gly3814*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 26)
• Consequence: USH2A NM_206933.4 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4
• Conservation: PhyloP100: 3.44

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]

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 1-215743285-C-A is Pathogenic according to our data. Variant chr1-215743285-C-A is described in ClinVar as [Pathogenic]. Clinvar id is 180084.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-215743285-C-A is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
USH2A	NM_206933.4	c.11440G>T	p.Gly3814*	stop_gained	Exon 59 of 72	ENST00000307340.8	NP_996816.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
USH2A	ENST00000307340.8	c.11440G>T	p.Gly3814*	stop_gained	Exon 59 of 72	1	NM_206933.4	ENSP00000305941.3
USH2A	ENST00000674083.1	c.11440G>T	p.Gly3814*	stop_gained	Exon 59 of 73			ENSP00000501296.1

Frequencies

GnomAD3 genomes Cov.: 26

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 26

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:1

Apr 23, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 180084). This premature translational stop signal has been observed in individual(s) with retinitis pigmentosa (PMID: 30718709). This variant is not present in population databases (gnomAD no frequency). This sequence change creates a premature translational stop signal (p.Gly3814*) in the USH2A gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in USH2A are known to be pathogenic (PMID: 10729113, 10909849, 20507924, 25649381). -

Rare genetic deafness Pathogenic:1

Nov 12, 2014

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Gly3814X variant in USH2A has not been previously reported in individuals with hearing loss and was absent from large population studies. This nonsense va riant leads to a premature termination codon at position 3814, which is predicte d to lead to a truncated or absent protein. In summary, this variant meets our c riteria to be classified as pathogenic for Usher syndrome in an autosomal recess ive manner (www.partners.org/personalizedmedicine/lmm). -

Usher syndrome type 2A Pathogenic:1

Nov 04, 2023

Genome-Nilou Lab

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Retinitis pigmentosa Pathogenic:1

Apr 01, 2018

Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.60
CADD	Pathogenic	40
DANN	Uncertain	0.98
Eigen	Pathogenic	0.78
Eigen_PC	Uncertain	0.55
FATHMM_MKL	Uncertain	0.92	D
Vest4		0.82
GERP RS		4.0

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.18		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

Other links and lift over

dbSNP: rs727505337; hg19: chr1-215916627;