1-216422259-A-G

Position:

chr1-216422259-A-G

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_StrongBP6BP7BS1BS2

The NM_206933.4(USH2A):c.78T>C(p.Ala26Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000921 in 1,613,718 control chromosomes in the GnomAD database, including 10 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. A26A) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0051 ( 4 hom., cov: 32)

Exomes 𝑓: 0.00048 ( 6 hom. )

Consequence

USH2A
NM_206933.4 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:4

Conservation

PhyloP100: -0.202

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 Benign. Variant got -14 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.81).

BP6

Variant 1-216422259-A-G is Benign according to our data. Variant chr1-216422259-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 48591.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Benign=4}. Variant chr1-216422259-A-G is described in Lovd as [Benign].

BP7

Synonymous conserved (PhyloP=-0.202 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00512 (779/152266) while in subpopulation AFR AF= 0.0181 (754/41560). AF 95% confidence interval is 0.0171. There are 4 homozygotes in gnomad4. There are 364 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
USH2A	NM_206933.4 linkuse as main transcript	c.78T>C	p.Ala26Ala	synonymous_variant	2/72	ENST00000307340.8	NP_996816.3	O75445-1
USH2A	NM_007123.6 linkuse as main transcript	c.78T>C	p.Ala26Ala	synonymous_variant	2/21		NP_009054.6	O75445-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
USH2A	ENST00000307340.8 linkuse as main transcript	c.78T>C	p.Ala26Ala	synonymous_variant	2/72	1	NM_206933.4	ENSP00000305941.3	O75445-1
USH2A	ENST00000366942.3 linkuse as main transcript	c.78T>C	p.Ala26Ala	synonymous_variant	2/21	1		ENSP00000355909.3	O75445-2
USH2A	ENST00000674083.1 linkuse as main transcript	c.78T>C	p.Ala26Ala	synonymous_variant	2/73			ENSP00000501296.1	O75445-3

Frequencies

GnomAD3 genomes

AF:

0.00508

AC:

773

AN:

152148

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0181

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00124

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00287

GnomAD3 exomes

AF:

0.00125

AC:

314

AN:

250522

Hom.:

AF XY:

0.000908

AC XY:

123

AN XY:

135392

show subpopulations

Gnomad AFR exome

AF:

0.0174

Gnomad AMR exome

AF:

0.000726

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000653

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000884

Gnomad OTH exome

AF:

0.000492

GnomAD4 exome

AF:

0.000484

AC:

707

AN:

1461452

Hom.:

Cov.:

AF XY:

0.000391

AC XY:

284

AN XY:

727034

show subpopulations

Gnomad4 AFR exome

AF:

0.0173

Gnomad4 AMR exome

AF:

0.000784

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000153

Gnomad4 OTH exome

AF:

0.00113

GnomAD4 genome

AF:

0.00512

AC:

779

AN:

152266

Hom.:

Cov.:

AF XY:

0.00489

AC XY:

364

AN XY:

74428

show subpopulations

Gnomad4 AFR

AF:

0.0181

Gnomad4 AMR

AF:

0.00124

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00284

Alfa

AF:

0.00212

Hom.:

Bravo

AF:

0.00538

Asia WGS

AF:

0.00202

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 03, 2015	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 31, 2024	- -

Retinitis pigmentosa

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases did not allow this variant to be ruled in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. -

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Apr 25, 2017

Ala26Ala in exon 2 of USH2A: This variant is not expected to have clinical signi ficance because it does not alter an amino acid residue, is not located near a s plice junction and has been identified in 1.8% (443/24026) of African chromosome s chromosomes by the Genome Aggregation Database (gnomAD, http://gnomad.broadins titute.org; dbSNP rs59139861). -

Usher syndrome type 2A

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.81

CADD

Benign

0.68

DANN

Benign

0.46

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

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