NM_000836.4:c.2041A>G

Variant names:

• chr19-48419764-A-G
• rs1555893359
• NM_000836.4:c.2041A>G

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PM1 PM2 PM5 PP3_Moderate PP5_Very_Strong

The NM_000836.4(GRIN2D):​c.2041A>G​(p.Met681Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M681I) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 27)
• Consequence: GRIN2D NM_000836.4 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 9.26
• Publications: 0 publications found

Genes affected

GRIN2D (HGNC:4588): (glutamate ionotropic receptor NMDA type subunit 2D) N-methyl-D-aspartate (NMDA) receptors are a class of ionotropic glutamate receptors. NMDA channel has been shown to be involved in long-term potentiation, an activity-dependent increase in the efficiency of synaptic transmission thought to underlie certain kinds of memory and learning. NMDA receptor channels are heteromers composed of the key receptor subunit NMDAR1 (GRIN1) and 1 or more of the 4 NMDAR2 subunits: NMDAR2A (GRIN2A), NMDAR2B (GRIN2B), NMDAR2C (GRIN2C), and NMDAR2D (GRIN2D). [provided by RefSeq, Mar 2010]

GRIN2D Gene-Disease associations (from GenCC):

• complex neurodevelopmental disorder

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• developmental and epileptic encephalopathy, 46

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• undetermined early-onset epileptic encephalopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 16 ACMG points.

• PM1: In a hotspot region, there are 5 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 4 uncertain in NM_000836.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr19-48419766-G-C is described in ClinVar as Pathogenic. ClinVar VariationId is 599388.Status of the report is no_assertion_criteria_provided, 0 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.885
• PP5: Variant 19-48419764-A-G is Pathogenic according to our data. Variant chr19-48419764-A-G is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 1013174.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000836.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GRIN2D	NM_000836.4	MANE Select	c.2041A>G	p.Met681Val	missense	Exon 10 of 14	NP_000827.2	O15399

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GRIN2D	ENST00000263269.4	TSL:1 MANE Select	c.2041A>G	p.Met681Val	missense	Exon 10 of 14	ENSP00000263269.2	O15399
	GRIN2D	ENST00000911262.1		c.2041A>G	p.Met681Val	missense	Exon 9 of 13	ENSP00000581321.1

Frequencies

GnomAD3 genomes Cov.: 27

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 27

ClinVar

ClinVar submissions

Significance: Pathogenic/Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
2	-	-	not provided (2)
1	-	-	Developmental and epileptic encephalopathy, 46 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.16	D
BayesDel_noAF	Uncertain	0.0
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.72	D
Eigen	Pathogenic	0.77
Eigen_PC	Pathogenic	0.73
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Benign	0.032	D
MetaRNN	Pathogenic	0.88	D
MetaSVM	Benign	-0.48	T
MutationAssessor	Pathogenic	3.1	M
PhyloP100		9.3
PrimateAI	Uncertain	0.74	T
PROVEAN	Uncertain	-3.9	D
REVEL	Uncertain	0.48
Sift	Uncertain	0.0010	D
Sift4G	Pathogenic	0.0010	D
Polyphen		0.98	D
Vest4		0.83
MutPred		0.69		Gain of sheet (P = 0.1945)
MVP		0.78
ClinPred		0.99	D
GERP RS		4.6
Varity_R		0.69
gMVP		0.96
Mutation Taster		=40/60	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs1555893359; hg19: chr19-48923021;