rs6848132

Variant names:

• chr4-92320436-G-T
• rs6848132
• NM_001510.4:c.88+15692G>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001510.4(GRID2):​c.88+15692G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0657 in 152,104 control chromosomes in the GnomAD database, including 374 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.066 (374 hom., cov: 32)
• Consequence: GRID2 NM_001510.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.230
• Publications: 5 publications found

Genes affected

GRID2 (HGNC:4576): (glutamate ionotropic receptor delta type subunit 2) The protein encoded by this gene is a member of the family of ionotropic glutamate receptors which are the predominant excitatory neurotransmitter receptors in the mammalian brain. The encoded protein is a multi-pass membrane protein that is expressed selectively in cerebellar Purkinje cells. A point mutation in the mouse ortholog, associated with the phenotype named 'lurcher', in the heterozygous state leads to ataxia resulting from selective, cell-autonomous apoptosis of cerebellar Purkinje cells during postnatal development. Mice homozygous for this mutation die shortly after birth from massive loss of mid- and hindbrain neurons during late embryogenesis. This protein also plays a role in synapse organization between parallel fibers and Purkinje cells. Alternate splicing results in multiple transcript variants encoding distinct isoforms. Mutations in this gene cause cerebellar ataxia in humans. [provided by RefSeq, Apr 2014]

GRID2 Gene-Disease associations (from GenCC):

• autosomal recessive spinocerebellar ataxia 18

  Inheritance: AR, AD Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-1.01).
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.0813 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GRID2	NM_001510.4	c.88+15692G>T		intron_variant	Intron 1 of 15	ENST00000282020.9	NP_001501.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GRID2	ENST00000282020.9	c.88+15692G>T		intron_variant	Intron 1 of 15	1	NM_001510.4	ENSP00000282020.4
GRID2	ENST00000510992.5	c.88+15692G>T		intron_variant	Intron 1 of 14	1		ENSP00000421257.1
GRID2	ENST00000505687.5	n.260+15692G>T		intron_variant	Intron 1 of 5	1

Frequencies

GnomAD3 genomes AF: 0.0657 AC: 9989 AN: 151986 Hom.: 371 Cov.: 32

Gnomad AFR AF: 0.0351

Gnomad AMI AF: 0.0680

Gnomad AMR AF: 0.0853

Gnomad ASJ AF: 0.0758

Gnomad EAS AF: 0.0123

Gnomad SAS AF: 0.0758

Gnomad FIN AF: 0.0755

Gnomad MID AF: 0.146

Gnomad NFE AF: 0.0807

Gnomad OTH AF: 0.0704

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

GnomAD4 genome AF: 0.0657 AC: 9996 AN: 152104 Hom.: 374 Cov.: 32 AF XY: 0.0662 AC XY: 4926 AN XY: 74360

African (AFR) AF: 0.0354 AC: 1469 AN: 41514

American (AMR) AF: 0.0852 AC: 1300 AN: 15262

Ashkenazi Jewish (ASJ) AF: 0.0758 AC: 263 AN: 3470

East Asian (EAS) AF: 0.0124 AC: 64 AN: 5176

South Asian (SAS) AF: 0.0762 AC: 367 AN: 4814

European-Finnish (FIN) AF: 0.0755 AC: 798 AN: 10570

Middle Eastern (MID) AF: 0.136 AC: 40 AN: 294

European-Non Finnish (NFE) AF: 0.0807 AC: 5487 AN: 67982

Other (OTH) AF: 0.0692 AC: 146 AN: 2110

Alfa AF: 0.0764 Hom.: 279

Bravo AF: 0.0644

Asia WGS AF: 0.0510 AC: 177 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-1.0
CADD	Benign	0.77
DANN	Benign	0.34
PhyloP100		-0.23
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs6848132; hg19: chr4-93241587;