chr1-215674647-CAAGGGAG-C

Position:

• chr1-215674647-CAAGGGAG-C

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.13257_13263delCTCCCTT​(p.Phe4419fs) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: USH2A NM_206933.4 frameshift
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:7
• Conservation: PhyloP100: 7.09

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 1-215674647-CAAGGGAG-C is Pathogenic according to our data. Variant chr1-215674647-CAAGGGAG-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 371787.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-215674647-CAAGGGAG-C is described in Lovd as [Pathogenic]. Variant chr1-215674647-CAAGGGAG-C is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
USH2A	NM_206933.4	c.13257_13263delCTCCCTT	p.Phe4419fs	frameshift_variant	63/72	ENST00000307340.8	NP_996816.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
USH2A	ENST00000307340.8	c.13257_13263delCTCCCTT	p.Phe4419fs	frameshift_variant	63/72	1	NM_206933.4	ENSP00000305941.3
USH2A	ENST00000674083.1	c.13257_13263delCTCCCTT	p.Phe4419fs	frameshift_variant	63/73			ENSP00000501296.1

Frequencies

GnomAD3 genomes Cov.: 32

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

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:7

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Retinitis pigmentosa 39 Pathogenic:4

Likely pathogenic, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Nov 04, 2023	- -
Likely pathogenic, criteria provided, single submitter	research	Ocular Genomics Institute, Massachusetts Eye and Ear	Apr 08, 2021	The USH2A c.13257_13263del 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: PVS1, PM2. Based on this evidence we have classified this variant as Likely Pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Jun 29, 2023	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Nov 07, 2016	- -

Usher syndrome type 2A Pathogenic:2

Likely pathogenic, criteria provided, single submitter	clinical testing	Genome-Nilou Lab	Nov 04, 2023	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Nov 07, 2016	- -

Retinal dystrophy Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Institute of Human Genetics, Univ. Regensburg, Univ. Regensburg

Jan 01, 2017

- -

Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1057517533; hg19: chr1-215847989;