9-101573220-G-T

Variant names:

• chr9-101573220-G-T
• rs762678837
• NM_133445.3:c.3302C>A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_133445.3(GRIN3A):​c.3302C>A​(p.Thr1101Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000219 in 1,461,802 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000022 (0 hom.)
• Consequence: GRIN3A NM_133445.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.17

Genes affected

GRIN3A (HGNC:16767): (glutamate ionotropic receptor NMDA type subunit 3A) This gene encodes a subunit of the N-methyl-D-aspartate (NMDA) receptors, which belong to the superfamily of glutamate-regulated ion channels, and function in physiological and pathological processes in the central nervous system. This subunit shows greater than 90% identity to the corresponding subunit in rat. Studies in the knockout mouse deficient in this subunit suggest that this gene may be involved in the development of synaptic elements by modulating NMDA receptor activity. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.10313651).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GRIN3A	NM_133445.3	c.3302C>A	p.Thr1101Lys	missense_variant	Exon 9 of 9	ENST00000361820.6	NP_597702.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GRIN3A	ENST00000361820.6	c.3302C>A	p.Thr1101Lys	missense_variant	Exon 9 of 9	1	NM_133445.3	ENSP00000355155.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000399 AC: 1 AN: 250386 Hom.: 0 AF XY: 0.00000739 AC XY: 1 AN XY: 135274

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000887

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000219 AC: 32 AN: 1461802 Hom.: 0 Cov.: 30 AF XY: 0.0000193 AC XY: 14 AN XY: 727200

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000288

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000434 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.074
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.57
CADD	Benign	18
DANN	Benign	0.88
DEOGEN2	Benign	0.023	T
Eigen	Benign	-0.090
Eigen_PC	Benign	0.088
FATHMM_MKL	Benign	0.49	N
LIST_S2	Benign	0.75	T
M_CAP	Benign	0.0032	T
MetaRNN	Benign	0.10	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.0	L
PrimateAI	Benign	0.43	T
PROVEAN	Benign	-0.63	N
REVEL	Benign	0.048
Sift	Benign	0.33	T
Sift4G	Benign	0.89	T
Polyphen		0.0020	B
Vest4		0.15
MutPred		0.23		Gain of ubiquitination at T1101 (P = 0.0022);
MVP		0.64
MPC		0.15
ClinPred		0.090	T
GERP RS		5.5
Varity_R		0.083
gMVP		0.18

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

Publications

LitVar

Other links and lift over

dbSNP: rs762678837; hg19: chr9-104335502;