NM_032119.4:c.8155+4G>T

Variant names:

• chr5-90697150-G-T
• rs397517438
• NM_032119.4:c.8155+4G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_032119.4(ADGRV1):​c.8155+4G>T variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,455,684 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: ADGRV1 NM_032119.4 splice_region, intron
• Scores: Splicing: ADA: 0.01774
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 0.763
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• Usher syndrome type 2

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
• Usher syndrome type 2C

  Inheritance: AR Classification: STRONG Submitted by: G2P, PanelApp Australia, Labcorp Genetics (formerly Invitae)
• febrile seizures, familial, 4

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• nonsyndromic genetic hearing loss

  Inheritance: AR Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.28).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ADGRV1	NM_032119.4	c.8155+4G>T		splice_region_variant, intron_variant	Intron 34 of 89	ENST00000405460.9	NP_115495.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ADGRV1	ENST00000405460.9	c.8155+4G>T		splice_region_variant, intron_variant	Intron 34 of 89	1	NM_032119.4	ENSP00000384582.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000407 AC: 1 AN: 245696 AF XY: 0.00

Gnomad AFR exome AF: 0.0000649

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS 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: 0.00000137 AC: 2 AN: 1455684 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 723546

African (AFR) AF: 0.0000301 AC: 1 AN: 33212

American (AMR) AF: 0.00 AC: 0 AN: 44350

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25972

East Asian (EAS) AF: 0.00 AC: 0 AN: 39572

South Asian (SAS) AF: 0.00 AC: 0 AN: 85160

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53320

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5738

European-Non Finnish (NFE) AF: 9.02e-7 AC: 1 AN: 1108228

Other (OTH) AF: 0.00 AC: 0 AN: 60132

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Uncertain:1

Nov 07, 2011

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant classified as Uncertain Significance - Favor Benign. The 8155+4G>T varia nt in GPR98 has not been reported in the literature nor previously reported by o ur laboratory. This variant is located in the 5' splice region but does not affe ct the invariant +1 and +2 positions. However, positions +3 to +6 are part of th e splicing consensus sequence and variants involving these positions sometimes a ffect splicing. Although position +4 is part of the splice site region, the refe rence sequence was already divergent from consensus (normally an A at this posit ion) and therefore this variant is less likely to disrupt splicing. In addition , splicing prediction programs do not predict a lower score for splice consensus sequence matching. In summary, based upon the arguments described above, we wou ld lean towards a more likely benign role. -

not provided Uncertain:1

-

Breakthrough Genomics, Breakthrough Genomics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.28
CADD	Benign	18
DANN	Benign	0.90
PhyloP100		0.76

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.018
dbscSNV1_RF	Benign	0.22
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs397517438; hg19: chr5-89992967;