18-13882560-C-T

Position:

• chr18-13882560-C-T

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 2P and 10B. PM2 BP4_Strong BP6_Moderate BS1

The NM_000529.2(MC2R):​c.*2065G>A variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000683 in 152,260 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.00068 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: MC2R NM_000529.2 3_prime_UTR
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.299

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 -8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 18-13882560-C-T is Benign according to our data. Variant chr18-13882560-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 891402.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000683 (104/152260) while in subpopulation SAS AF= 0.00559 (27/4826). AF 95% confidence interval is 0.00395. There are 0 homozygotes in gnomad4. There are 56 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MC2R	NM_000529.2	c.*2065G>A		3_prime_UTR_variant	2/2	ENST00000327606.4
MC2R	NM_001291911.1	c.*2065G>A		3_prime_UTR_variant	2/2
MC2R	XM_017025781.2	c.*2065G>A		3_prime_UTR_variant	3/3
MC2R	XM_047437537.1	c.*2065G>A		3_prime_UTR_variant	4/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MC2R	ENST00000327606.4	c.*2065G>A		3_prime_UTR_variant	2/2	1	NM_000529.2	P1

Frequencies

GnomAD3 genomes AF: 0.000684 AC: 104 AN: 152142 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000724

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000393

Gnomad ASJ AF: 0.00202

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00559

Gnomad FIN AF: 0.00160

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000632

Gnomad OTH AF: 0.000478

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 2 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 2

Gnomad4 FIN exome AF: 0.00

GnomAD4 genome AF: 0.000683 AC: 104 AN: 152260 Hom.: 0 Cov.: 33 AF XY: 0.000752 AC XY: 56 AN XY: 74446

Gnomad4 AFR AF: 0.0000722

Gnomad4 AMR AF: 0.000392

Gnomad4 ASJ AF: 0.00202

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00559

Gnomad4 FIN AF: 0.00160

Gnomad4 NFE AF: 0.000632

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.000476 Hom.: 0

Bravo AF: 0.000389

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Glucocorticoid deficiency 1 Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 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 likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	1.6
DANN	Benign	0.66

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: rs193046675; hg19: chr18-13882559;