6-146312682-T-C

Variant names:

• chr6-146312682-T-C
• rs362962
• NM_001278064.2:c.1186+7836T>C

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001278064.2(GRM1):​c.1186+7836T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.378 in 152,138 control chromosomes in the GnomAD database, including 15,014 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.38 (15014 hom., cov: 32)
• Consequence: GRM1 NM_001278064.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.618
• Publications: 8 publications found

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

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.97).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.745 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GRM1	NM_001278064.2	c.1186+7836T>C		intron_variant	Intron 3 of 7	ENST00000282753.6	NP_001264993.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GRM1	ENST00000282753.6	c.1186+7836T>C		intron_variant	Intron 3 of 7	1	NM_001278064.2	ENSP00000282753.1

Frequencies

GnomAD3 genomes AF: 0.378 AC: 57424 AN: 152020 Hom.: 14972 Cov.: 32

Gnomad AFR AF: 0.752

Gnomad AMI AF: 0.265

Gnomad AMR AF: 0.321

Gnomad ASJ AF: 0.279

Gnomad EAS AF: 0.141

Gnomad SAS AF: 0.259

Gnomad FIN AF: 0.196

Gnomad MID AF: 0.278

Gnomad NFE AF: 0.226

Gnomad OTH AF: 0.364

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.378 AC: 57530 AN: 152138 Hom.: 15014 Cov.: 32 AF XY: 0.374 AC XY: 27809 AN XY: 74392

African (AFR) AF: 0.752 AC: 31182 AN: 41472

American (AMR) AF: 0.321 AC: 4906 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.279 AC: 967 AN: 3470

East Asian (EAS) AF: 0.141 AC: 729 AN: 5176

South Asian (SAS) AF: 0.258 AC: 1247 AN: 4830

European-Finnish (FIN) AF: 0.196 AC: 2071 AN: 10590

Middle Eastern (MID) AF: 0.276 AC: 81 AN: 294

European-Non Finnish (NFE) AF: 0.226 AC: 15340 AN: 68004

Other (OTH) AF: 0.363 AC: 766 AN: 2110

Alfa AF: 0.272 Hom.: 25377

Bravo AF: 0.405

Asia WGS AF: 0.256 AC: 890 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.97
CADD	Benign	0.74
DANN	Benign	0.64
PhyloP100		-0.62
Mutation Taster		=100/0	polymorphism (auto)

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: rs362962; hg19: chr6-146633818;