18-13882193-T-G

Position:

• chr18-13882193-T-G

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_000529.2(MC2R):​c.*2432A>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 0.0098 in 152,098 control chromosomes in the GnomAD database, including 7 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0098 (7 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, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 0.0190

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 -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.71).
• BP6: Variant 18-13882193-T-G is Benign according to our data. Variant chr18-13882193-T-G is described in ClinVar as [Likely_benign]. Clinvar id is 326123.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.0098 (1491/152098) while in subpopulation NFE AF= 0.0153 (1044/68028). AF 95% confidence interval is 0.0146. There are 7 homozygotes in gnomad4. There are 703 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 7 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MC2R	NM_000529.2	c.*2432A>C		3_prime_UTR_variant	2/2	ENST00000327606.4
MC2R	NM_001291911.1	c.*2432A>C		3_prime_UTR_variant	2/2
MC2R	XM_017025781.2	c.*2432A>C		3_prime_UTR_variant	3/3
MC2R	XM_047437537.1	c.*2432A>C		3_prime_UTR_variant	4/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MC2R	ENST00000327606.4	c.*2432A>C		3_prime_UTR_variant	2/2	1	NM_000529.2	P1

Frequencies

GnomAD3 genomes AF: 0.00982 AC: 1492 AN: 151976 Hom.: 7 Cov.: 33

Gnomad AFR AF: 0.00252

Gnomad AMI AF: 0.00439

Gnomad AMR AF: 0.0118

Gnomad ASJ AF: 0.0101

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00228

Gnomad FIN AF: 0.00725

Gnomad MID AF: 0.0316

Gnomad NFE AF: 0.0153

Gnomad OTH AF: 0.0129

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 6 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 6

Gnomad4 AFR exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

GnomAD4 genome AF: 0.00980 AC: 1491 AN: 152098 Hom.: 7 Cov.: 33 AF XY: 0.00945 AC XY: 703 AN XY: 74392

Gnomad4 AFR AF: 0.00251

Gnomad4 AMR AF: 0.0118

Gnomad4 ASJ AF: 0.0101

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00249

Gnomad4 FIN AF: 0.00725

Gnomad4 NFE AF: 0.0153

Gnomad4 OTH AF: 0.0123

Alfa AF: 0.0134 Hom.: 3

Bravo AF: 0.00985

Asia WGS AF: 0.00115 AC: 4 AN: 3476

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

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. -

not provided Benign:1

Likely benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

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- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.71
CADD	Benign	3.6
DANN	Benign	0.83

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: rs187121326; hg19: chr18-13882192;