1-23874604-G-C

Variant names:

• chr1-23874604-G-C
• rs2229581
• NM_001841.3:c.1014C>G

Variant summary

Our verdict is Benign. The variant received -13 ACMG points: 0P and 13B. BP4_Strong BP7 BA1

The NM_001841.3(CNR2):​c.1014C>G​(p.Thr338Thr) 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 1,613,604 control chromosomes in the GnomAD database, including 287,051 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 (30997 hom., cov: 32)
  • Exomes 𝑓: 0.59 (256054 hom.)
• Consequence: CNR2 NM_001841.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.459
• Publications: 16 publications found

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

Our verdict: Benign. The variant received -13 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).
• BP7: Synonymous conserved (PhyloP=-0.459 with no splicing effect.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.749 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001841.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CNR2	NM_001841.3	MANE Select	c.1014C>G	p.Thr338Thr	synonymous	Exon 2 of 2	NP_001832.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CNR2	ENST00000374472.5	TSL:1 MANE Select	c.1014C>G	p.Thr338Thr	synonymous	Exon 2 of 2	ENSP00000363596.4

Frequencies

GnomAD3 genomes AF: 0.635 AC: 96385 AN: 151876 Hom.: 30987 Cov.: 32

Gnomad AFR AF: 0.757

Gnomad AMI AF: 0.547

Gnomad AMR AF: 0.641

Gnomad ASJ AF: 0.580

Gnomad EAS AF: 0.525

Gnomad SAS AF: 0.713

Gnomad FIN AF: 0.579

Gnomad MID AF: 0.701

Gnomad NFE AF: 0.574

Gnomad OTH AF: 0.619

GnomAD2 exomes AF: 0.617 AC: 155196 AN: 251450 AF XY: 0.617

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 FIN exome AF: 0.583

Gnomad NFE exome AF: 0.574

Gnomad OTH exome AF: 0.611

GnomAD4 exome AF: 0.589 AC: 861429 AN: 1461610 Hom.: 256054 Cov.: 53 AF XY: 0.593 AC XY: 430979 AN XY: 727114

African (AFR) AF: 0.766 AC: 25623 AN: 33470

American (AMR) AF: 0.680 AC: 30396 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.573 AC: 14981 AN: 26132

East Asian (EAS) AF: 0.569 AC: 22582 AN: 39692

South Asian (SAS) AF: 0.719 AC: 62042 AN: 86256

European-Finnish (FIN) AF: 0.574 AC: 30642 AN: 53410

Middle Eastern (MID) AF: 0.710 AC: 4093 AN: 5768

European-Non Finnish (NFE) AF: 0.571 AC: 635237 AN: 1111774

Other (OTH) AF: 0.593 AC: 35833 AN: 60384

GnomAD4 genome AF: 0.634 AC: 96437 AN: 151994 Hom.: 30997 Cov.: 32 AF XY: 0.638 AC XY: 47359 AN XY: 74266

African (AFR) AF: 0.756 AC: 31378 AN: 41490

American (AMR) AF: 0.641 AC: 9792 AN: 15266

Ashkenazi Jewish (ASJ) AF: 0.580 AC: 2012 AN: 3470

East Asian (EAS) AF: 0.524 AC: 2705 AN: 5166

South Asian (SAS) AF: 0.713 AC: 3436 AN: 4816

European-Finnish (FIN) AF: 0.579 AC: 6087 AN: 10522

Middle Eastern (MID) AF: 0.692 AC: 202 AN: 292

European-Non Finnish (NFE) AF: 0.574 AC: 39036 AN: 67956

Other (OTH) AF: 0.613 AC: 1292 AN: 2108

Alfa AF: 0.556 Hom.: 6361

Bravo AF: 0.644

Asia WGS AF: 0.630 AC: 2193 AN: 3478

EpiCase AF: 0.578

EpiControl AF: 0.591

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	0.20
DANN	Benign	0.39
PhyloP100		-0.46
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: rs2229581; hg19: chr1-24201094; COSMIC: COSV65692437;