rs2518283

chr6-101924507-T-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_021956.5(GRIK2):c.1749-94T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0131 in 715,972 control chromosomes in the GnomAD database, including 652 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 0.043 (477 hom., cov: 32)
  • Exomes 𝑓: 0.0050 (175 hom.)
• Consequence: GRIK2 NM_021956.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.05

Genes affected

GRIK2 (HGNC:4580): (glutamate ionotropic receptor kainate type subunit 2) Glutamate receptors are the predominant excitatory neurotransmitter receptors in the mammalian brain and are activated in a variety of normal neurophysiologic processes. This gene product belongs to the kainate family of glutamate receptors, which are composed of four subunits and function as ligand-activated ion channels. The subunit encoded by this gene is subject to RNA editing at multiple sites within the first and second transmembrane domains, which is thought to alter the structure and function of the receptor complex. Alternatively spliced transcript variants encoding different isoforms have also been described for this gene. Mutations in this gene have been associated with autosomal recessive cognitive disability. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.53).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.147 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GRIK2	NM_021956.5	c.1749-94T>C		intron_variant		ENST00000369134.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GRIK2	ENST00000369134.9	c.1749-94T>C		intron_variant		5	NM_021956.5	P4

Frequencies

GnomAD3 genomes AF: 0.0428 AC: 6516 AN: 152100 Hom.: 474 Cov.: 32

Gnomad AFR AF: 0.150

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0157

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000621

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00633

Gnomad NFE AF: 0.000147

Gnomad OTH AF: 0.0234

GnomAD4 exome AF: 0.00503 AC: 2833 AN: 563754 Hom.: 175 AF XY: 0.00396 AC XY: 1195 AN XY: 301906

Gnomad4 AFR exome AF: 0.145

Gnomad4 AMR exome AF: 0.00691

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000284

Gnomad4 SAS exome AF: 0.000215

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000217

Gnomad4 OTH exome AF: 0.00989

GnomAD4 genome AF: 0.0429 AC: 6535 AN: 152218 Hom.: 477 Cov.: 32 AF XY: 0.0410 AC XY: 3053 AN XY: 74424

Gnomad4 AFR AF: 0.150

Gnomad4 AMR AF: 0.0157

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000622

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000147

Gnomad4 OTH AF: 0.0232

Alfa AF: 0.0300 Hom.: 19

Bravo AF: 0.0479

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.53
Cadd	Benign	15
Dann	Benign	0.79

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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

Other links and lift over

dbSNP: rs2518283; hg19: chr6-102372382;