rs146996893

Positions:

chr6-146398789-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 1P and 1B. PP2BS1_Supporting

The NM_001278064.2(GRM1):c.1750C>T(p.Arg584Cys) variant causes a missense change. The variant allele was found at a frequency of 0.0000881 in 1,611,606 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000088 ( 0 hom. )

Consequence

GRM1
NM_001278064.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 4.11

Variant links:

Genes affected

GRM1 (HGNC:4593): (glutamate metabotropic receptor 1) This gene encodes a metabotropic glutamate receptor that functions by activating phospholipase C. L-glutamate is the major excitatory neurotransmitter in the central nervous system and activates both ionotropic and metabotropic glutamate receptors. Glutamatergic neurotransmission is involved in most aspects of normal brain function and can be perturbed in many neuropathologic conditions. The canonical alpha isoform of the encoded protein is a disulfide-linked homodimer whose activity is mediated by a G-protein-coupled phosphatidylinositol-calcium second messenger system. This gene may be associated with many disease states, including schizophrenia, bipolar disorder, depression, and breast cancer. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, May 2013]

GRM1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), GRM1. . Gene score misZ 2.5817 (greater than the threshold 3.09). Trascript score misZ 3.6372 (greater than threshold 3.09). GenCC has associacion of gene with spinocerebellar ataxia 44, autosomal recessive spinocerebellar ataxia 13.

BS1

Variant frequency is greater than expected in population sas. gnomad4_exome allele frequency = 0.0000877 (128/1459486) while in subpopulation SAS AF= 0.000325 (28/86202). AF 95% confidence interval is 0.000231. There are 0 homozygotes in gnomad4_exome. There are 62 alleles in male gnomad4_exome subpopulation. Median coverage is 33. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GRM1	NM_001278064.2 linkuse as main transcript	c.1750C>T	p.Arg584Cys	missense_variant	7/8	ENST00000282753.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GRM1	ENST00000282753.6 linkuse as main transcript	c.1750C>T	p.Arg584Cys	missense_variant	7/8	1	NM_001278064.2	P1	Q13255-1

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

152120

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000206

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000995

AC:

AN:

251364

Hom.:

AF XY:

0.000132

AC XY:

AN XY:

135878

show subpopulations

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:

0.000327

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000123

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000877

AC:

128

AN:

1459486

Hom.:

Cov.:

AF XY:

0.0000854

AC XY:

AN XY:

726228

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000325

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000856

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000920

AC:

AN:

152120

Hom.:

Cov.:

AF XY:

0.0000942

AC XY:

AN XY:

74324

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000206

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000132

Hom.:

Bravo

AF:

0.0000567

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000132

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Athena Diagnostics

Sep 30, 2016

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jan 09, 2024

This sequence change replaces arginine, which is basic and polar, with cysteine, which is neutral and slightly polar, at codon 584 of the GRM1 protein (p.Arg584Cys). This variant is present in population databases (rs146996893, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with GRM1-related conditions. ClinVar contains an entry for this variant (Variation ID: 447460). An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant¬†is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.40

BayesDel_addAF

Benign

-0.093

BayesDel_noAF

Uncertain

-0.070

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.74

.;D;.;D;.

Eigen

Uncertain

0.59

Eigen_PC

Uncertain

0.63

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.95

.;D;D;.;D

M_CAP

Uncertain

0.11

MetaRNN

Uncertain

0.45

T;T;T;T;T

MetaSVM

Uncertain

0.31

MutationAssessor

Uncertain

2.1

M;M;M;M;M

MutationTaster

Benign

1.0

D;D;D;D;D;D

PrimateAI

Uncertain

0.58

PROVEAN

Uncertain

-4.0

D;D;D;D;D

REVEL

Uncertain

0.63

Sift

Uncertain

0.010

D;D;D;D;D

Sift4G

Uncertain

0.033

D;D;D;D;D

Polyphen

0.99

D;D;.;D;D

Vest4

0.43

MVP

0.72

MPC

1.3

ClinPred

0.60

GERP RS

5.8

Varity_R

0.44

gMVP

0.73

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