1-23874772-A-G

Variant summary

Our verdict is Benign. Variant got -13 ACMG points: 0P and 13B. BP4_Strong BP7 BA1

The NM_001841.3(CNR2):c.846T>C(p.Ala282=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.594 in 1,613,860 control chromosomes in the GnomAD database, including 287,075 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 0.63 (31020 hom., cov: 32)
  • Exomes 𝑓: 0.59 (256055 hom.)
• Consequence: CNR2 NM_001841.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.431

Genes affected

CNR2 (HGNC:2160): (cannabinoid receptor 2) The cannabinoid delta-9-tetrahydrocannabinol is the principal psychoactive ingredient of marijuana. The proteins encoded by this gene and the cannabinoid receptor 1 (brain) (CNR1) gene have the characteristics of a guanine nucleotide-binding protein (G-protein)-coupled receptor for cannabinoids. They inhibit adenylate cyclase activity in a dose-dependent, stereoselective, and pertussis toxin-sensitive manner. These proteins have been found to be involved in the cannabinoid-induced CNS effects (including alterations in mood and cognition) experienced by users of marijuana. The cannabinoid receptors are members of family 1 of the G-protein-coupled receptors. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -13 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.67).
• BP7: Synonymous conserved (PhyloP=0.431 with no splicing effect.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.749 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CNR2	NM_001841.3	c.846T>C	p.Ala282=	synonymous_variant	2/2	ENST00000374472.5
CNR2	XM_011540629.4	c.846T>C	p.Ala282=	synonymous_variant	2/2
CNR2	XM_017000261.3	c.846T>C	p.Ala282=	synonymous_variant	3/3
CNR2	XM_047444833.1	c.846T>C	p.Ala282=	synonymous_variant	2/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CNR2	ENST00000374472.5	c.846T>C	p.Ala282=	synonymous_variant	2/2	1	NM_001841.3	P1

Frequencies

GnomAD3 genomes AF: 0.635 AC: 96436 AN: 151958 Hom.: 31010 Cov.: 32

Gnomad AFR AF: 0.757

Gnomad AMI AF: 0.550

Gnomad AMR AF: 0.641

Gnomad ASJ AF: 0.581

Gnomad EAS AF: 0.526

Gnomad SAS AF: 0.713

Gnomad FIN AF: 0.576

Gnomad MID AF: 0.703

Gnomad NFE AF: 0.574

Gnomad OTH AF: 0.619

GnomAD3 exomes AF: 0.617 AC: 155135 AN: 251322 Hom.: 48586 AF XY: 0.618 AC XY: 83883 AN XY: 135836

Gnomad AFR exome AF: 0.761

Gnomad AMR exome AF: 0.686

Gnomad ASJ exome AF: 0.575

Gnomad EAS exome AF: 0.529

Gnomad SAS exome AF: 0.717

Gnomad FIN exome AF: 0.583

Gnomad NFE exome AF: 0.574

Gnomad OTH exome AF: 0.611

GnomAD4 exome AF: 0.589 AC: 861510 AN: 1461784 Hom.: 256055 Cov.: 61 AF XY: 0.593 AC XY: 431033 AN XY: 727206

Gnomad4 AFR exome AF: 0.766

Gnomad4 AMR exome AF: 0.680

Gnomad4 ASJ exome AF: 0.573

Gnomad4 EAS exome AF: 0.569

Gnomad4 SAS exome AF: 0.719

Gnomad4 FIN exome AF: 0.574

Gnomad4 NFE exome AF: 0.571

Gnomad4 OTH exome AF: 0.593

GnomAD4 genome AF: 0.634 AC: 96488 AN: 152076 Hom.: 31020 Cov.: 32 AF XY: 0.638 AC XY: 47402 AN XY: 74352

Gnomad4 AFR AF: 0.756

Gnomad4 AMR AF: 0.641

Gnomad4 ASJ AF: 0.581

Gnomad4 EAS AF: 0.525

Gnomad4 SAS AF: 0.714

Gnomad4 FIN AF: 0.576

Gnomad4 NFE AF: 0.574

Gnomad4 OTH AF: 0.613

Alfa AF: 0.591 Hom.: 34156

Bravo AF: 0.644

Asia WGS AF: 0.632 AC: 2197 AN: 3478

EpiCase AF: 0.578

EpiControl AF: 0.591

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.67
Cadd	Benign	8.6
Dann	Benign	0.69

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: rs2502993; hg19: chr1-24201262; COSMIC: COSV65692447;