rs201558076

Positions:

chr1-216207438-T-C

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBP6

The NM_206933.4(USH2A):c.3158-7A>G variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000159 in 1,613,844 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00090 ( 1 hom., cov: 32)

Exomes 𝑓: 0.000081 ( 1 hom. )

Consequence

USH2A
NM_206933.4 splice_region, intron

Scores

Splicing: ADA: 0.0004707

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:5

Conservation

PhyloP100: 0.108

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:

USH2A-AS1 (HGNC:):

USH2A-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.38).

BP6

Variant 1-216207438-T-C is Benign according to our data. Variant chr1-216207438-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 228212.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=1, Benign=3}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	MANE	Protein	UniProt
USH2A	NM_206933.4 linkuse as main transcript	c.3158-7A>G	splice_region_variant, intron_variant	ENST00000307340.8	NP_996816.3	O75445-1
USH2A	NM_007123.6 linkuse as main transcript	c.3158-7A>G	splice_region_variant, intron_variant		NP_009054.6	O75445-2
USH2A-AS1	XR_922596.4 linkuse as main transcript	n.691+11513T>C	intron_variant

Ensembl

Gene	Transcript	HGVSc	Effect	TSL	MANE	Protein	UniProt
USH2A	ENST00000307340.8 linkuse as main transcript	c.3158-7A>G	splice_region_variant, intron_variant	1	NM_206933.4	ENSP00000305941.3	O75445-1
USH2A	ENST00000366942.3 linkuse as main transcript	c.3158-7A>G	splice_region_variant, intron_variant	1		ENSP00000355909.3	O75445-2
USH2A	ENST00000674083.1 linkuse as main transcript	c.3158-7A>G	splice_region_variant, intron_variant			ENSP00000501296.1	O75445-3

Frequencies

GnomAD3 genomes

AF:

0.000881

AC:

134

AN:

152092

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00304

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000393

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:

0.000957

GnomAD3 exomes

AF:

0.000191

AC:

AN:

250944

Hom.:

AF XY:

0.000118

AC XY:

AN XY:

135622

show subpopulations

Gnomad AFR exome

AF:

0.00271

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000546

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000814

AC:

119

AN:

1461634

Hom.:

Cov.:

AF XY:

0.0000646

AC XY:

AN XY:

727106

show subpopulations

Gnomad4 AFR exome

AF:

0.00269

Gnomad4 AMR exome

AF:

0.000179

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.000298

GnomAD4 genome

AF:

0.000900

AC:

137

AN:

152210

Hom.:

Cov.:

AF XY:

0.000995

AC XY:

AN XY:

74408

show subpopulations

Gnomad4 AFR

AF:

0.00311

Gnomad4 AMR

AF:

0.000393

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:

0.000947

Alfa

AF:

0.000691

Hom.:

Bravo

AF:

0.000971

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:5

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Feb 26, 2015	c.3158-7A>G in intron 15 of USH2A: This variant is not expected to have clinical significance because it has been identified in 0.3% (28/10558) of African chrom osomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.or g; dbSNP rs201558076). -
Uncertain significance, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	May 15, 2024	Variant summary: USH2A c.3158-7A>G alters a conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. Consensus agreement among computation tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.00016 in 1613844 control chromosomes, predominantly at a frequency of 0.0029 within the African or African-American subpopulation in the gnomAD database, including 2 homozygotes. This frequency is not significantly higher than estimated for a pathogenic variant in USH2A causing Usher Syndrome (0.00016 vs 0.011), allowing no conclusion about variant significance. To our knowledge, no occurrence of c.3158-7A>G in individuals affected with Usher Syndrome and no experimental evidence demonstrating its impact on protein function have been reported. ClinVar contains an entry for this variant (Variation ID: 228212). Based on the evidence outlined above, the variant was classified as VUS-possibly benign. -

not provided

Benign:2

Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Aug 31, 2020	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 28, 2024	- -

Retinitis pigmentosa 39

Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Apr 11, 2023

- -

Usher syndrome type 2A

Benign:1

Benign, criteria provided, single submitter

clinical testing

Genome-Nilou Lab

Apr 11, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.38

CADD

Benign

9.5

DANN

Benign

0.84

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00047

dbscSNV1_RF

Benign

0.076

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