chr5-90810231-A-G

Position:

chr5-90810231-A-G

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_032119.4(ADGRV1):c.14973-2A>G variant causes a splice acceptor, intron change. The variant allele was found at a frequency of 0.0000293 in 1,534,776 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000023 ( 0 hom. )

Consequence

ADGRV1
NM_032119.4 splice_acceptor, intron

Scores

Splicing: ADA: 1.000

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:8

Conservation

PhyloP100: 6.22

Variant links:

Genes affected

ADGRV1 (HGNC:17416): (adhesion G protein-coupled receptor V1) This gene encodes a member of the G-protein coupled receptor superfamily. The encoded protein contains a 7-transmembrane receptor domain, binds calcium and is expressed in the central nervous system. Mutations in this gene are associated with Usher syndrome 2 and familial febrile seizures. Several alternatively spliced transcripts have been described. [provided by RefSeq, Jul 2008]

ADGRV1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PVS1

Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, Cryptic splice site detected, with MaxEntScore 6.4, offset of 5, new splice context is: taatttttttcccggatcAGgtt. Cryptic site results in frameshift change. If cryptic site found is not functional and variant results in exon loss, it results in frameshift change.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 5-90810231-A-G is Pathogenic according to our data. Variant chr5-90810231-A-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 46275.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr5-90810231-A-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ADGRV1	NM_032119.4 link	c.14973-2A>G		splice_acceptor_variant, intron_variant		ENST00000405460.9	NP_115495.3	Q8WXG9-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ADGRV1	ENST00000405460.9 link	c.14973-2A>G		splice_acceptor_variant, intron_variant		1	NM_032119.4	ENSP00000384582.2		Q8WXG9-1

Frequencies

GnomAD3 genomes

AF:

0.0000854

AC:

AN:

152144

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00317

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000629

AC:

AN:

158958

Hom.:

AF XY:

0.0000475

AC XY:

AN XY:

84220

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00135

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000231

AC:

AN:

1382632

Hom.:

Cov.:

AF XY:

0.0000191

AC XY:

AN XY:

680522

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00113

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000186

Gnomad4 OTH exome

AF:

0.0000524

GnomAD4 genome

AF:

0.0000854

AC:

AN:

152144

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74310

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00317

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000670

Hom.:

Bravo

AF:

0.0000264

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000123

AC:

ExAC

AF:

0.0000336

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:2

Likely pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Jun 21, 2024	Reported in association with inherited retinal diseases in published literature but with limited clinical and segregation information (PMID: 32037395, 31456290); Canonical splice site variant predicted to result in a null allele in a gene for which loss of function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 31456290, 31964843, 32037395, 31980526) -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 14, 2023	This sequence change affects an acceptor splice site in intron 73 of the ADGRV1 gene. It is expected to disrupt RNA splicing. Variants that disrupt the donor or acceptor splice site typically lead to a loss of protein function (PMID: 16199547), and loss-of-function variants in ADGRV1 are known to be pathogenic (PMID: 19357117, 22135276, 22147658, 26226137, 30718709, 31047384, 32467589). This variant is present in population databases (rs371981035, gnomAD 0.2%). Disruption of this splice site has been observed in individuals with Usher syndrome (PMID: 31456290, 31980526, 32037395; Invitae). ClinVar contains an entry for this variant (Variation ID: 46275). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic. -

Usher syndrome type 2

Pathogenic:1

Pathogenic, no assertion criteria provided

research

Sharon lab, Hadassah-Hebrew University Medical Center

Jun 23, 2019

- -

Usher syndrome

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Feb 28, 2023

Variant summary: ADGRV1 c.14973-2A>G is located in a canonical splice-site and is predicted to affect mRNA splicing resulting in a significantly altered protein due to either exon skipping, shortening, or inclusion of intronic material. Several computational tools predict a significant impact on normal splicing: Four predict the variant abolishes a canonical 3' acceptor site and four predict the variant creates/strengthens a cryptic 3' acceptor site downstream. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 6.3e-05 in 158958 control chromosomes, found exclusively within the Ashkenazi Jewish subpopulation of the gnomAD database. This frequency is not significantly higher than estimated for a pathogenic variant in ADGRV1 causing Usher Syndrome (6.3e-05 vs 0.0054), allowing no conclusion about variant significance. c.14973-2A>G has been reported in the literature in individuals affected with Usher Syndrome (e.g. Zampaglione_2020, Sharon_2020). These data indicate that the variant may be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Four submitters have provided clinical-significance assessments for this variant to ClinVar after 2014 and all classified the variant as pathogenic (n=3)/likely pathogenic (n=1). Based on the evidence outlined above, the variant was classified as likely pathogenic. -

Usher syndrome type 2C

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Victorian Clinical Genetics Services, Murdoch Childrens Research Institute

Oct 09, 2024

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 2C (MIM#605472). (I) 0106 - This gene is associated with autosomal recessive disease. The association between monoallelic variants and febrile seizures, familial, 4 (MIM#604352) has not been established (PanelApp Australia). (I) 0211 - Canonical splice site variant without proven consequence on splicing (no functional evidence available). (SP) 0251 - This variant is heterozygous. (I) 0304 - Variant is present in gnomAD <0.01 for a recessive condition (v3: 13 heterozygotes, 0 homozygotes). (SP) 0311 - An alternative nucleotide change at the same canonical splice site is present in gnomAD (v3: 1 heterozygote, 0 homozygotes). (I) 0505 - Abnormal splicing is predicted by in silico tools and affected nucleotide is highly conserved. (SP) 0801 - This variant has strong previous evidence of pathogenicity in unrelated individuals. It has been reported as pathogenic/likely pathogenic by multiple clinical testing laboratories (ClinVar). It has also been reported in the literature as homozygous in an individual with Usher syndrome (PMID: 37798099). (SP) 1208 - Inheritance information for this variant is not currently available in this individual. (I) Legend: (SP) - Supporting pathogenic, (I) - Information, (SB) - Supporting benign -

Febrile seizures, familial, 4;C2931213:Usher syndrome type 2C

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Feb 08, 2024

- -

Rare genetic deafness

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jul 03, 2020

The c.14973-2A>G variant in ADGRV1 has been reported in 1 individual with Usher syndrome who harbored a second variant in ADGRV1 and segregated with disease in 1 affected relative (LMM internal data). It has also been identified in 0.16% (12/7704) of Ashkenazi Jewish chromosomes and 1/84474 European chromosomes by gnomAD (http://gnomad.broadinstitute.org) and has been reported in ClinVar (Variation ID: 46275). This variant occurs within the canonical splice site (+/- 1,2) and is predicted to cause altered splicing leading to an abnormal or absent protein. Loss of function of the ADGRV1 gene is an established disease mechanism in autosomal recessive Usher syndrome. In summary, this variant meets criteria to be classified as pathogenic for autosomal recessive Usher syndrome. ACMG/AMP Criteria applied: PVS1, PM3, PP1, PP4 -

Retinal dystrophy

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Blueprint Genetics

Sep 04, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.32

BayesDel_noAF

Pathogenic

0.22

CADD

Pathogenic

DANN

Uncertain

0.99

Eigen

Pathogenic

1.1

Eigen_PC

Pathogenic

0.90

FATHMM_MKL

Pathogenic

0.97

GERP RS

5.5

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.93

SpliceAI score (max)

0.92

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.31

Position offset: 7

DS_AL_spliceai

0.92

Position offset: 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