chr7-126716097-A-C

Position:

• chr7-126716097-A-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000845.3(GRM8):​c.1357+53768T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.191 in 152,182 control chromosomes in the GnomAD database, including 2,995 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 0.19 (2995 hom., cov: 32)
• Consequence: GRM8 NM_000845.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.04

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 -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.258 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GRM8	NM_000845.3	c.1357+53768T>G		intron_variant		ENST00000339582.7	NP_000836.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GRM8	ENST00000339582.7	c.1357+53768T>G		intron_variant		5	NM_000845.3	ENSP00000344173	P1

Frequencies

GnomAD3 genomes AF: 0.191 AC: 29063 AN: 152064 Hom.: 2991 Cov.: 32

Gnomad AFR AF: 0.262

Gnomad AMI AF: 0.274

Gnomad AMR AF: 0.167

Gnomad ASJ AF: 0.154

Gnomad EAS AF: 0.169

Gnomad SAS AF: 0.164

Gnomad FIN AF: 0.131

Gnomad MID AF: 0.152

Gnomad NFE AF: 0.167

Gnomad OTH AF: 0.209

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

GnomAD4 genome AF: 0.191 AC: 29080 AN: 152182 Hom.: 2995 Cov.: 32 AF XY: 0.190 AC XY: 14104 AN XY: 74404

Gnomad4 AFR AF: 0.262

Gnomad4 AMR AF: 0.167

Gnomad4 ASJ AF: 0.154

Gnomad4 EAS AF: 0.169

Gnomad4 SAS AF: 0.164

Gnomad4 FIN AF: 0.131

Gnomad4 NFE AF: 0.167

Gnomad4 OTH AF: 0.208

Alfa AF: 0.171 Hom.: 1225

Bravo AF: 0.195

Asia WGS AF: 0.166 AC: 578 AN: 3474

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	10
DANN	Benign	0.67

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: rs1468157; hg19: chr7-126356151;