rs78631453

Positions:

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 1P and 20B. PP2BP4_StrongBP6_Very_StrongBS1BS2

The NM_001134407.3(GRIN2A):c.422C>T(p.Thr141Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0015 in 1,603,046 control chromosomes in the GnomAD database, including 7 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.00093 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0016 ( 7 hom. )

Consequence

GRIN2A
NM_001134407.3 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:13

Conservation

PhyloP100: 2.87

Variant links:

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -19 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), GRIN2A. . Gene score misZ 2.8278 (greater than the threshold 3.09). Trascript score misZ 3.7088 (greater than threshold 3.09). GenCC has associacion of gene with early-onset epileptic encephalopathy and intellectual disability due to GRIN2A mutation, Landau-Kleffner syndrome, continuous spikes and waves during sleep, complex neurodevelopmental disorder, rolandic epilepsy-speech dyspraxia syndrome, childhood epilepsy with centrotemporal spikes.

BP4

Computational evidence support a benign effect (MetaRNN=0.008182764).

BP6

Variant 16-9938544-G-A is Benign according to our data. Variant chr16-9938544-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 205638.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-9938544-G-A is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000926 (141/152314) while in subpopulation NFE AF= 0.00159 (108/68022). AF 95% confidence interval is 0.00135. There are 0 homozygotes in gnomad4. There are 66 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAd4 at 141 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GRIN2A	NM_001134407.3 linkuse as main transcript	c.422C>T	p.Thr141Met	missense_variant	3/13	ENST00000330684.4	NP_001127879.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GRIN2A	ENST00000330684.4 linkuse as main transcript	c.422C>T	p.Thr141Met	missense_variant	3/13	1	NM_001134407.3	ENSP00000332549	P1	Q12879-1

Frequencies

GnomAD3 genomes

AF:

0.000926

AC:

141

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000193

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00403

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00124

Gnomad FIN

AF:

0.000282

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00159

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00111

AC:

260

AN:

235002

Hom.:

AF XY:

0.00114

AC XY:

147

AN XY:

128780

show subpopulations

Gnomad AFR exome

AF:

0.000200

Gnomad AMR exome

AF:

0.000609

Gnomad ASJ exome

AF:

0.00363

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00102

Gnomad FIN exome

AF:

0.000367

Gnomad NFE exome

AF:

0.00148

Gnomad OTH exome

AF:

0.000838

GnomAD4 exome

AF:

0.00156

AC:

2266

AN:

1450732

Hom.:

Cov.:

AF XY:

0.00160

AC XY:

1152

AN XY:

722104

show subpopulations

Gnomad4 AFR exome

AF:

0.000209

Gnomad4 AMR exome

AF:

0.000581

Gnomad4 ASJ exome

AF:

0.00367

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00122

Gnomad4 FIN exome

AF:

0.000279

Gnomad4 NFE exome

AF:

0.00175

Gnomad4 OTH exome

AF:

0.00114

GnomAD4 genome

AF:

0.000926

AC:

141

AN:

152314

Hom.:

Cov.:

AF XY:

0.000886

AC XY:

AN XY:

74476

show subpopulations

Gnomad4 AFR

AF:

0.000192

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00403

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00125

Gnomad4 FIN

AF:

0.000282

Gnomad4 NFE

AF:

0.00159

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.00187

Hom.:

Bravo

AF:

0.000963

TwinsUK

AF:

0.00189

AC:

ALSPAC

AF:

0.00337

AC:

ESP6500AA

AF:

0.000230

AC:

ESP6500EA

AF:

0.00154

AC:

ExAC

AF:

0.00104

AC:

126

EpiCase

AF:

0.00180

EpiControl

AF:

0.00166

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:13

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Landau-Kleffner syndrome

Benign:4

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 25, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Likely benign, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Oct 29, 2021	- -
Likely benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -

not provided

Benign:4

Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jul 01, 2024	GRIN2A: BP4, BS1 -
Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Mar 08, 2018	- -

not specified

Benign:3

Benign, criteria provided, single submitter	clinical testing	GeneDx	Dec 13, 2016	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Likely benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jun 26, 2017	- -
Likely benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Nov 19, 2015	- -

Inborn genetic diseases

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 08, 2019

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

GRIN2A-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Nov 22, 2019

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.082

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.38

CADD

Benign

DANN

Benign

0.86

DEOGEN2

Benign

0.31

T;.;.;T;.

Eigen

Benign

-0.75

Eigen_PC

Benign

-0.56

FATHMM_MKL

Uncertain

0.76

LIST_S2

Benign

0.82

.;T;T;T;T

M_CAP

Uncertain

0.23

MetaRNN

Benign

0.0082

T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-1.0

N;.;N;N;.

MutationTaster

Benign

1.0

D;N;N;N;N;N

PrimateAI

Benign

0.26

PROVEAN

Benign

-0.87

N;.;N;N;.

REVEL

Benign

0.18

Sift

Benign

0.21

T;.;T;T;.

Sift4G

Benign

0.29

T;T;T;T;.

Polyphen

0.016

B;.;.;B;.

Vest4

0.23

MVP

0.64

MPC

0.65

ClinPred

0.0050

GERP RS

1.6

Varity_R

0.032

gMVP

0.61

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over