rs17867725

chr7-126991514-T-C

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 0P and 10B. BP4_Moderate BA1

The NM_000845.3(GRM8):c.728-86831A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.101 in 152,242 control chromosomes in the GnomAD database, including 1,070 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 0.10 (1070 hom., cov: 32)
• Consequence: GRM8 NM_000845.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.928

Genes affected

GRM8 (HGNC:4600): (glutamate metabotropic receptor 8) 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. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.27).
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.165 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GRM8	NM_000845.3	c.728-86831A>G		intron_variant		ENST00000339582.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GRM8	ENST00000339582.7	c.728-86831A>G		intron_variant		5	NM_000845.3	P1

Frequencies

GnomAD3 genomes AF: 0.101 AC: 15432 AN: 152124 Hom.: 1065 Cov.: 32

Gnomad AFR AF: 0.0234

Gnomad AMI AF: 0.108

Gnomad AMR AF: 0.170

Gnomad ASJ AF: 0.140

Gnomad EAS AF: 0.00288

Gnomad SAS AF: 0.0803

Gnomad FIN AF: 0.202

Gnomad MID AF: 0.0791

Gnomad NFE AF: 0.125

Gnomad OTH AF: 0.111

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

GnomAD4 genome AF: 0.101 AC: 15448 AN: 152242 Hom.: 1070 Cov.: 32 AF XY: 0.105 AC XY: 7848 AN XY: 74422

Gnomad4 AFR AF: 0.0234

Gnomad4 AMR AF: 0.171

Gnomad4 ASJ AF: 0.140

Gnomad4 EAS AF: 0.00270

Gnomad4 SAS AF: 0.0802

Gnomad4 FIN AF: 0.202

Gnomad4 NFE AF: 0.125

Gnomad4 OTH AF: 0.111

Alfa AF: 0.113 Hom.: 191

Bravo AF: 0.0982

Asia WGS AF: 0.0640 AC: 222 AN: 3470

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.27
Cadd	Benign	18
Dann	Benign	0.84

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

Other links and lift over

dbSNP: rs17867725; hg19: chr7-126631568;