NM_007327.4:c.1666C>T

Variant names:

• chr9-137162205-C-T
• rs1554770057
• NM_007327.4:c.1666C>T

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_007327.4(GRIN1):​c.1666C>T​(p.Gln556*) variant causes a stop gained change. 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 Pathogenic (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: GRIN1 NM_007327.4 stop_gained
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 5.49
• Publications: 2 publications found

Genes affected

GRIN1 (HGNC:4584): (glutamate ionotropic receptor NMDA type subunit 1) The protein encoded by this gene is a critical subunit of N-methyl-D-aspartate receptors, members of the glutamate receptor channel superfamily which are heteromeric protein complexes with multiple subunits arranged to form a ligand-gated ion channel. These subunits play a key role in the plasticity of synapses, which is believed to underlie memory and learning. Cell-specific factors are thought to control expression of different isoforms, possibly contributing to the functional diversity of the subunits. Alternatively spliced transcript variants have been described. [provided by RefSeq, Jul 2008]

GRIN1 Gene-Disease associations (from GenCC):

• neurodevelopmental disorder with or without hyperkinetic movements and seizures, autosomal dominant

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
• complex neurodevelopmental disorder

  Inheritance: AR, AD Classification: DEFINITIVE Submitted by: ClinGen
• neurodevelopmental disorder with or without hyperkinetic movements and seizures, autosomal recessive

  Inheritance: AR Classification: DEFINITIVE, MODERATE Submitted by: G2P, Ambry Genetics
• developmental and epileptic encephalopathy 101

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• autosomal dominant non-syndromic intellectual disability

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 9-137162205-C-T is Pathogenic according to our data. Variant chr9-137162205-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 487506.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_007327.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GRIN1	NM_007327.4	MANE Select	c.1666C>T	p.Gln556*	stop_gained	Exon 12 of 20	NP_015566.1
	GRIN1	NM_001437330.1		c.1729C>T	p.Gln577*	stop_gained	Exon 13 of 21	NP_001424259.1
	GRIN1	NM_001185090.2		c.1729C>T	p.Gln577*	stop_gained	Exon 13 of 21	NP_001172019.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GRIN1	ENST00000371561.8	TSL:1 MANE Select	c.1666C>T	p.Gln556*	stop_gained	Exon 12 of 20	ENSP00000360616.3
	GRIN1	ENST00000371553.8	TSL:1	c.1729C>T	p.Gln577*	stop_gained	Exon 13 of 21	ENSP00000360608.3
	GRIN1	ENST00000371560.5	TSL:1	c.1729C>T	p.Gln577*	stop_gained	Exon 13 of 20	ENSP00000360615.3

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1391644 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 687356

African (AFR) AF: 0.00 AC: 0 AN: 31816

American (AMR) AF: 0.00 AC: 0 AN: 36220

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25184

East Asian (EAS) AF: 0.00 AC: 0 AN: 36082

South Asian (SAS) AF: 0.00 AC: 0 AN: 79438

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 39108

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4714

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1081100

Other (OTH) AF: 0.00 AC: 0 AN: 57982

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Developmental and epileptic encephalopathy 101 Pathogenic:1

Mar 25, 2022

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.61	D
BayesDel_noAF	Pathogenic	0.63
CADD	Pathogenic	41
DANN	Uncertain	1.0
Eigen	Pathogenic	0.93
Eigen_PC	Pathogenic	0.73
FATHMM_MKL	Uncertain	0.96	D
PhyloP100		5.5
Vest4		0.92
GERP RS		3.8
Mutation Taster		=0/200	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: rs1554770057; hg19: chr9-140056657;