Genetic Variant GRM2:p.Thr270Thr (chr3-51712832-C-T) – ACMG Classification: Benign (-9 pts)

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_ModerateBP6_ModerateBP7BS2

The NM_000839.5(GRM2):c.810C>T(p.Thr270Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000453 in 1,612,938 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

Frequency

Genomes: 𝑓 0.0025 ( 3 hom., cov: 33)

Exomes 𝑓: 0.00024 ( 2 hom. )

Consequence

GRM2
NM_000839.5 synonymous

Scores

Clinical Significance

Benign criteria provided, single submitter B:1

Conservation

PhyloP100: -0.0430

Variant links:

Genes affected

GRM2 (HGNC:4594): (glutamate metabotropic receptor 2) 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 metabotropic glutamate receptors are a family of G protein-coupled receptors, that have been divided into 3 groups on the basis of sequence homology, putative signal transduction mechanisms, and pharmacologic properties. Group I includes GRM1 and GRM5 and these receptors have been shown to activate phospholipase C. Group II includes GRM2 and GRM3 while Group III includes GRM4, GRM6, GRM7 and GRM8. Group II and III receptors are linked to the inhibition of the cyclic AMP cascade but differ in their agonist selectivities. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2017]

GRM2 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.45).

BP6

Variant 3-51712832-C-T is Benign according to our data. Variant chr3-51712832-C-T is described in ClinVar as [Benign]. Clinvar id is 712700.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=-0.043 with no splicing effect.

BS2

High AC in GnomAd4 at 376 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GRM2	NM_000839.5 link	c.810C>T	p.Thr270Thr	synonymous_variant	Exon 3 of 6	ENST00000395052.8	NP_000830.2	Q14416

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GRM2	ENST00000395052.8 link	c.810C>T	p.Thr270Thr	synonymous_variant	Exon 3 of 6	2	NM_000839.5	ENSP00000378492.3		Q14416

Frequencies

GnomAD3 genomes

AF:

0.00247

AC:

376

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00840

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00177

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:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000688

AC:

171

AN:

248408

Hom.:

AF XY:

0.000541

AC XY:

AN XY:

135044

show subpopulations

Gnomad AFR exome

AF:

0.00948

Gnomad AMR exome

AF:

0.000492

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000269

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000242

AC:

354

AN:

1460602

Hom.:

Cov.:

AF XY:

0.000222

AC XY:

161

AN XY:

726618

show subpopulations

Gnomad4 AFR exome

AF:

0.00854

Gnomad4 AMR exome

AF:

0.000626

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000360

Gnomad4 OTH exome

AF:

0.000580

GnomAD4 genome

AF:

0.00247

AC:

376

AN:

152336

Hom.:

Cov.:

AF XY:

0.00251

AC XY:

187

AN XY:

74488

show subpopulations

Gnomad4 AFR

AF:

0.00837

Gnomad4 AMR

AF:

0.00176

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.00131

Hom.:

Bravo

AF:

0.00314

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Jul 04, 2018

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.45

CADD

Benign

6.4

DANN

Benign

0.66

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

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