NM_021956.5:c.116-104911A>G

Variant names:

• chr6-101517038-A-G
• rs9390754
• NM_021956.5:c.116-104911A>G

Variant summary

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

The NM_021956.5(GRIK2):​c.116-104911A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.202 in 151,984 control chromosomes in the GnomAD database, including 4,618 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 0.20 (4618 hom., cov: 32)
• Consequence: GRIK2 NM_021956.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.516
• Publications: 7 publications found

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]

GRIK2 Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AR, AD Classification: DEFINITIVE, MODERATE Submitted by: ClinGen
• intellectual disability, autosomal recessive 6

  Inheritance: AR Classification: DEFINITIVE, STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• neurodevelopmental disorder with impaired language and ataxia and with or without seizures

  Inheritance: AD Classification: STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• autosomal recessive non-syndromic intellectual disability

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

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

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.87).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.391 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GRIK2	NM_021956.5	c.116-104911A>G		intron_variant	Intron 2 of 16	ENST00000369134.9	NP_068775.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GRIK2	ENST00000369134.9	c.116-104911A>G		intron_variant	Intron 2 of 16	5	NM_021956.5	ENSP00000358130.6

Frequencies

GnomAD3 genomes AF: 0.202 AC: 30720 AN: 151866 Hom.: 4620 Cov.: 32

Gnomad AFR AF: 0.397

Gnomad AMI AF: 0.111

Gnomad AMR AF: 0.176

Gnomad ASJ AF: 0.116

Gnomad EAS AF: 0.347

Gnomad SAS AF: 0.334

Gnomad FIN AF: 0.0870

Gnomad MID AF: 0.0981

Gnomad NFE AF: 0.0947

Gnomad OTH AF: 0.175

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

GnomAD4 genome AF: 0.202 AC: 30727 AN: 151984 Hom.: 4618 Cov.: 32 AF XY: 0.205 AC XY: 15264 AN XY: 74280

African (AFR) AF: 0.396 AC: 16412 AN: 41430

American (AMR) AF: 0.175 AC: 2671 AN: 15242

Ashkenazi Jewish (ASJ) AF: 0.116 AC: 403 AN: 3464

East Asian (EAS) AF: 0.346 AC: 1790 AN: 5166

South Asian (SAS) AF: 0.332 AC: 1599 AN: 4818

European-Finnish (FIN) AF: 0.0870 AC: 922 AN: 10596

Middle Eastern (MID) AF: 0.0952 AC: 28 AN: 294

European-Non Finnish (NFE) AF: 0.0947 AC: 6435 AN: 67948

Other (OTH) AF: 0.173 AC: 366 AN: 2114

Alfa AF: 0.129 Hom.: 2812

Bravo AF: 0.215

Asia WGS AF: 0.307 AC: 1066 AN: 3476

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.87
CADD	Benign	5.0
DANN	Benign	0.79
PhyloP100		0.52
Mutation Taster		=100/0	polymorphism (auto)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs9390754; hg19: chr6-101964914;