rs1366076

Variant names:

• chr16-10170093-A-T
• rs1366076
• NM_001134407.3:c.414+9905T>A

Variant summary

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

The NM_001134407.3(GRIN2A):​c.414+9905T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.225 in 152,194 control chromosomes in the GnomAD database, including 4,319 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 0.23 (4319 hom., cov: 32)
• Consequence: GRIN2A NM_001134407.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.216
• Publications: 9 publications found

Genes affected

GRIN2A (HGNC:4585): (glutamate ionotropic receptor NMDA type subunit 2A) This gene encodes a member of the glutamate-gated ion channel protein family. The encoded protein is an N-methyl-D-aspartate (NMDA) receptor subunit. NMDA receptors are both ligand-gated and voltage-dependent, and are involved in long-term potentiation, an activity-dependent increase in the efficiency of synaptic transmission thought to underlie certain kinds of memory and learning. These receptors are permeable to calcium ions, and activation results in a calcium influx into post-synaptic cells, which results in the activation of several signaling cascades. Disruption of this gene is associated with focal epilepsy and speech disorder with or without cognitive disability. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2014]

GRIN2A Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• Landau-Kleffner syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• continuous spikes and waves during sleep

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• early-onset epileptic encephalopathy and intellectual disability due to GRIN2A mutation

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• rolandic epilepsy-speech dyspraxia syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• self-limited epilepsy with centrotemporal spikes

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• neurodevelopmental disorder

  Inheritance: AR Classification: LIMITED Submitted by: G2P

ACMG classification

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

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.86).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.46 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GRIN2A	NM_001134407.3	c.414+9905T>A		intron_variant	Intron 2 of 12	ENST00000330684.4	NP_001127879.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GRIN2A	ENST00000330684.4	c.414+9905T>A		intron_variant	Intron 2 of 12	1	NM_001134407.3	ENSP00000332549.3

Frequencies

GnomAD3 genomes AF: 0.225 AC: 34274 AN: 152076 Hom.: 4314 Cov.: 32

Gnomad AFR AF: 0.172

Gnomad AMI AF: 0.149

Gnomad AMR AF: 0.324

Gnomad ASJ AF: 0.206

Gnomad EAS AF: 0.477

Gnomad SAS AF: 0.349

Gnomad FIN AF: 0.189

Gnomad MID AF: 0.250

Gnomad NFE AF: 0.215

Gnomad OTH AF: 0.233

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

GnomAD4 genome AF: 0.225 AC: 34283 AN: 152194 Hom.: 4319 Cov.: 32 AF XY: 0.230 AC XY: 17083 AN XY: 74408

African (AFR) AF: 0.171 AC: 7119 AN: 41534

American (AMR) AF: 0.325 AC: 4963 AN: 15284

Ashkenazi Jewish (ASJ) AF: 0.206 AC: 716 AN: 3470

East Asian (EAS) AF: 0.476 AC: 2457 AN: 5164

South Asian (SAS) AF: 0.348 AC: 1678 AN: 4828

European-Finnish (FIN) AF: 0.189 AC: 2000 AN: 10592

Middle Eastern (MID) AF: 0.245 AC: 72 AN: 294

European-Non Finnish (NFE) AF: 0.215 AC: 14652 AN: 68000

Other (OTH) AF: 0.232 AC: 490 AN: 2116

Alfa AF: 0.222 Hom.: 520

Bravo AF: 0.232

Asia WGS AF: 0.371 AC: 1289 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.86
CADD	Benign	2.8
DANN	Benign	0.48
PhyloP100		0.22
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: rs1366076; hg19: chr16-10263950;