NM_000845.3:c.727+100070G>A

Variant names:

• chr7-127006426-C-T
• rs7778604
• NM_000845.3:c.727+100070G>A

Variant summary

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

The NM_000845.3(GRM8):​c.727+100070G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.117 in 151,926 control chromosomes in the GnomAD database, including 1,245 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 0.12 (1245 hom., cov: 32)
• Consequence: GRM8 NM_000845.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.22

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=-0.94).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.177 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GRM8	NM_000845.3	c.727+100070G>A		intron_variant	Intron 3 of 10	ENST00000339582.7	NP_000836.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GRM8	ENST00000339582.7	c.727+100070G>A		intron_variant	Intron 3 of 10	5	NM_000845.3	ENSP00000344173.2

Frequencies

GnomAD3 genomes AF: 0.117 AC: 17759 AN: 151808 Hom.: 1247 Cov.: 32

Gnomad AFR AF: 0.181

Gnomad AMI AF: 0.0516

Gnomad AMR AF: 0.0906

Gnomad ASJ AF: 0.141

Gnomad EAS AF: 0.00329

Gnomad SAS AF: 0.120

Gnomad FIN AF: 0.0734

Gnomad MID AF: 0.111

Gnomad NFE AF: 0.0993

Gnomad OTH AF: 0.112

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

GnomAD4 genome AF: 0.117 AC: 17769 AN: 151926 Hom.: 1245 Cov.: 32 AF XY: 0.114 AC XY: 8479 AN XY: 74258

Gnomad4 AFR AF: 0.180

Gnomad4 AMR AF: 0.0905

Gnomad4 ASJ AF: 0.141

Gnomad4 EAS AF: 0.00310

Gnomad4 SAS AF: 0.119

Gnomad4 FIN AF: 0.0734

Gnomad4 NFE AF: 0.0993

Gnomad4 OTH AF: 0.111

Alfa AF: 0.103 Hom.: 401

Bravo AF: 0.119

Asia WGS AF: 0.0680 AC: 238 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.94
CADD	Benign	0.30
DANN	Benign	0.80

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: rs7778604; hg19: chr7-126646480;