chr11-120802773-G-C

Variant names:

• chr11-120802773-G-C
• rs372488720
• NM_014619.5:c.163G>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_014619.5(GRIK4):​c.163G>C​(p.Ala55Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,818 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. A55T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: GRIK4 NM_014619.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.35
• Publications: 0 publications found

Genes affected

GRIK4 (HGNC:4582): (glutamate ionotropic receptor kainate type subunit 4) This gene encodes a protein that belongs to the glutamate-gated ionic channel family. Glutamate functions as the major excitatory neurotransmitter in the central nervous system through activation of ligand-gated ion channels and G protein-coupled membrane receptors. The protein encoded by this gene forms functional heteromeric kainate-preferring ionic channels with the subunits encoded by related gene family members. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2013]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GRIK4	NM_014619.5	c.163G>C	p.Ala55Pro	missense_variant	Exon 4 of 21	ENST00000527524.8	NP_055434.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GRIK4	ENST00000527524.8	c.163G>C	p.Ala55Pro	missense_variant	Exon 4 of 21	2	NM_014619.5	ENSP00000435648.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461818 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727224

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1111946

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Uncertain	0.13	D
BayesDel_noAF	Uncertain	-0.050
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.14	T;T;T
Eigen	Benign	0.14
Eigen_PC	Benign	0.18
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.85	.;.;T
M_CAP	Benign	0.082	D
MetaRNN	Uncertain	0.74	D;D;D
MetaSVM	Uncertain	-0.11	T
MutationAssessor	Benign	1.6	L;L;L
PhyloP100		2.3
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-1.3	N;.;N
REVEL	Uncertain	0.59
Sift	Benign	0.087	T;.;T
Sift4G	Benign	0.28	T;.;T
Polyphen		0.94	P;P;P
Vest4		0.62
MutPred		0.61		Gain of catalytic residue at A55 (P = 0.0075);Gain of catalytic residue at A55 (P = 0.0075);Gain of catalytic residue at A55 (P = 0.0075);
MVP		0.80
MPC		1.2
ClinPred		0.84	D
GERP RS		4.7
Varity_R		0.21
gMVP		0.86
Mutation Taster		=62/38	polymorphism

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

Other links and lift over

dbSNP: rs372488720; hg19: chr11-120673482;