18-13883021-C-G

Variant summary

Our verdict is Benign. Variant got -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BS1 BS2

The NM_000529.2(MC2R):c.*1604G>C variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0268 in 152,424 control chromosomes in the GnomAD database, including 67 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency:
  • Genomes: 𝑓 0.027 (67 hom., cov: 33)
  • Exomes 𝑓: 0.020 (0 hom.)
• Consequence: MC2R NM_000529.2 3_prime_UTR
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.0770

Genes affected

MC2R (HGNC:6930): (melanocortin 2 receptor) MC2R encodes one member of the five-member G-protein associated melanocortin receptor family. Melanocortins (melanocyte-stimulating hormones and adrenocorticotropic hormone) are peptides derived from pro-opiomelanocortin (POMC). MC2R is selectively activated by adrenocorticotropic hormone, whereas the other four melanocortin receptors recognize a variety of melanocortin ligands. Mutations in MC2R can result in familial glucocorticoid deficiency. Alternate transcript variants have been found for this gene. [provided by RefSeq, May 2014]

ACMG classification

Verdict is Benign. Variant got -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.86).
• BP6: Variant 18-13883021-C-G is Benign according to our data. Variant chr18-13883021-C-G is described in ClinVar as [Benign]. Clinvar id is 326138.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.0268 (4079/152326) while in subpopulation SAS AF= 0.0548 (265/4832). AF 95% confidence interval is 0.0494. There are 67 homozygotes in gnomad4. There are 2024 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd at 66 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MC2R	NM_000529.2	c.*1604G>C		3_prime_UTR_variant	2/2	ENST00000327606.4
MC2R	NM_001291911.1	c.*1604G>C		3_prime_UTR_variant	2/2
MC2R	XM_017025781.2	c.*1604G>C		3_prime_UTR_variant	3/3
MC2R	XM_047437537.1	c.*1604G>C		3_prime_UTR_variant	4/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MC2R	ENST00000327606.4	c.*1604G>C		3_prime_UTR_variant	2/2	1	NM_000529.2	P1

Frequencies

GnomAD3 genomes AF: 0.0267 AC: 4066 AN: 152208 Hom.: 66 Cov.: 33

Gnomad AFR AF: 0.0236

Gnomad AMI AF: 0.106

Gnomad AMR AF: 0.0272

Gnomad ASJ AF: 0.0271

Gnomad EAS AF: 0.000578

Gnomad SAS AF: 0.0550

Gnomad FIN AF: 0.0141

Gnomad MID AF: 0.0316

Gnomad NFE AF: 0.0293

Gnomad OTH AF: 0.0272

GnomAD4 exome AF: 0.0204 AC: 2 AN: 98 Hom.: 0 Cov.: 0 AF XY: 0.0244 AC XY: 2 AN XY: 82

Gnomad4 AFR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0244

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0268 AC: 4079 AN: 152326 Hom.: 67 Cov.: 33 AF XY: 0.0272 AC XY: 2024 AN XY: 74494

Gnomad4 AFR AF: 0.0239

Gnomad4 AMR AF: 0.0271

Gnomad4 ASJ AF: 0.0271

Gnomad4 EAS AF: 0.000579

Gnomad4 SAS AF: 0.0548

Gnomad4 FIN AF: 0.0141

Gnomad4 NFE AF: 0.0294

Gnomad4 OTH AF: 0.0269

Alfa AF: 0.00402 Hom.: 1

Bravo AF: 0.0270

Asia WGS AF: 0.0250 AC: 87 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Glucocorticoid deficiency 1 Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.86
Cadd	Benign	1.3
Dann	Benign	0.71

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: rs28926185; hg19: chr18-13883020;