6-146434372-G-A

Variant names:

Variant summary

Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS1

The NM_001278064.2(GRM1):c.3161G>A(p.Gly1054Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000314 in 1,613,290 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. G1054G) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0018 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00016 ( 0 hom. )

Consequence

GRM1
NM_001278064.2 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 0.331

Publications

1 publications found

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 Gene-Disease associations (from GenCC):

spinocerebellar ataxia 44
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
autosomal recessive spinocerebellar ataxia 13
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, G2P

GRM1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -16 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0032530427).

BP6

Variant 6-146434372-G-A is Benign according to our data. Variant chr6-146434372-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 447463.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00175 (267/152336) while in subpopulation AFR AF = 0.00628 (261/41580). AF 95% confidence interval is 0.00565. There are 1 homozygotes in GnomAd4. There are 114 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001278064.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
GRM1	NM_001278064.2	MANE Select	c.3161G>A	p.Gly1054Asp	missense	Exon 8 of 8	NP_001264993.1
GRM1	NM_001278067.1		c.*399G>A		3_prime_UTR	Exon 8 of 8	NP_001264996.1
GRM1	NM_001278065.2		c.*525G>A		3_prime_UTR	Exon 10 of 10	NP_001264994.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
GRM1	ENST00000282753.6	TSL:1 MANE Select	c.3161G>A	p.Gly1054Asp	missense	Exon 8 of 8	ENSP00000282753.1
GRM1	ENST00000355289.8	TSL:1	c.*399G>A		3_prime_UTR	Exon 8 of 8	ENSP00000347437.4
GRM1	ENST00000492807.6	TSL:1	c.*525G>A		3_prime_UTR	Exon 10 of 10	ENSP00000424095.1

Frequencies

GnomAD3 genomes

AF:

0.00175

AC:

266

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00627

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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:

0.000956

GnomAD2 exomes

AF:

0.000442

AC:

108

AN:

244218

AF XY:

0.000300

show subpopulations

Gnomad AFR exome

AF:

0.00658

Gnomad AMR exome

AF:

0.000174

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000919

Gnomad OTH exome

AF:

0.000503

GnomAD4 exome

AF:

0.000164

AC:

240

AN:

1460954

Hom.:

Cov.:

AF XY:

0.000143

AC XY:

104

AN XY:

726704

show subpopulations

African (AFR)

AF:

0.00645

AC:

216

AN:

33472

American (AMR)

AF:

0.000157

AC:

AN:

44700

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26084

East Asian (EAS)

AF:

0.00

AC:

AN:

39686

South Asian (SAS)

AF:

0.00

AC:

AN:

86192

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53126

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111568

Other (OTH)

AF:

0.000249

AC:

AN:

60360

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00175

AC:

267

AN:

152336

Hom.:

Cov.:

AF XY:

0.00153

AC XY:

114

AN XY:

74482

show subpopulations

African (AFR)

AF:

0.00628

AC:

261

AN:

41580

American (AMR)

AF:

0.000261

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5168

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10630

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68034

Other (OTH)

AF:

0.000946

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.490

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000448

Hom.:

Bravo

AF:

0.00204

ESP6500AA

AF:

0.00455

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000528

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Jan 06, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Aug 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

GRM1: BP4, BS1

not specified

Benign:1

Sep 30, 2024

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Autosomal recessive spinocerebellar ataxia 13;C4521563:Spinocerebellar ataxia 44

Benign:1

Jan 10, 2022

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.44

CADD

Benign

(source)

DANN

Benign

0.91

DEOGEN2

Benign

0.097

Eigen

Benign

-0.91

Eigen_PC

Benign

-0.90

FATHMM_MKL

Benign

0.19

LIST_S2

Benign

0.64

M_CAP

Benign

0.032

MetaRNN

Benign

0.0033

MetaSVM

Benign

-0.85

MutationAssessor

Benign

0.0

PhyloP100

0.33

PrimateAI

Benign

0.37

PROVEAN

Benign

-0.67

REVEL

Benign

0.14

Sift

Benign

0.63

Sift4G

Benign

0.63

Polyphen

0.0030

Vest4

0.10

MVP

0.30

MPC

0.92

ClinPred

0.0014

GERP RS

-1.3

Varity_R

0.061

gMVP

0.49

Mutation Taster

=98/2

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over