rs145063086

chr16-9763717-G-Achr16-9763717-G-Cchr16-9763717-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 5P and 1B. PM2 PM5 PP2 BP4

The NM_001134407.3(GRIN2A):c.3827C>T(p.Ala1276Val) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A1276G) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: GRIN2A NM_001134407.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.81

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr16-9763717-G-C is described in Lovd as [Likely_pathogenic].
• PP2: Missense variant where missense usually causes diseases, GRIN2A
• BP4: Computational evidence support a benign effect (MetaRNN=0.36718822).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GRIN2A	NM_001134407.3	c.3827C>T	p.Ala1276Val	missense_variant	13/13	ENST00000330684.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GRIN2A	ENST00000330684.4	c.3827C>T	p.Ala1276Val	missense_variant	13/13	1	NM_001134407.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.076
BayesDel_addAF	Benign	-0.19	T
BayesDel_noAF	Benign	-0.50
Cadd	Benign	23
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.47	T;T
Eigen	Uncertain	0.30
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Uncertain	0.95	D
M_CAP	Benign	0.0086	T
MetaRNN	Benign	0.37	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.90	L;L
MutationTaster	Benign	0.89	D;D;D;D;D;D
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-1.3	N;N
REVEL	Benign	0.11
Sift	Uncertain	0.023	D;D
Sift4G	Benign	0.092	T;T
Polyphen		0.56	P;P
Vest4		0.049
MutPred		0.81		Loss of disorder (P = 0.0756);Loss of disorder (P = 0.0756);
MVP		0.35
MPC		0.26
ClinPred		0.71	D
GERP RS		5.3
Varity_R		0.16
gMVP		0.31

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr16-9857574; COSMIC: COSV58055172; COSMIC: COSV58055172;