rs121913561
Variant summary
Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1PP3_StrongPP5
The NM_005912.3(MC4R):c.821A>G(p.Asn274Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000867 in 1,614,046 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)
Exomes 𝑓: 0.0000089 ( 0 hom. )
Consequence
MC4R
NM_005912.3 missense
NM_005912.3 missense
Scores
4
9
6
Clinical Significance
Conservation
PhyloP100: 8.02
Genes affected
MC4R (HGNC:6932): (melanocortin 4 receptor) The protein encoded by this gene is a membrane-bound receptor and member of the melanocortin receptor family. The encoded protein interacts with adrenocorticotropic and MSH hormones and is mediated by G proteins. This is an intronless gene. Defects in this gene are a cause of autosomal dominant obesity. [provided by RefSeq, Jan 2010]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 7 ACMG points.
PM1
?
In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_005912.3
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.947
PP5
?
Variant 18-60371529-T-C is Pathogenic according to our data. Variant chr18-60371529-T-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 14324.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=1, Uncertain_significance=2}. Variant chr18-60371529-T-C is described in Lovd as [Likely_pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MC4R | NM_005912.3 | c.821A>G | p.Asn274Ser | missense_variant | 1/1 | ENST00000299766.5 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MC4R | ENST00000299766.5 | c.821A>G | p.Asn274Ser | missense_variant | 1/1 | NM_005912.3 | P1 | ||
ENST00000658928.1 | n.156+42184T>C | intron_variant, non_coding_transcript_variant | |||||||
ENST00000650201.1 | n.113+42184T>C | intron_variant, non_coding_transcript_variant |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152170Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.00000796 AC: 2AN: 251348Hom.: 0 AF XY: 0.00 AC XY: 0AN XY: 135838
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GnomAD4 exome AF: 0.00000889 AC: 13AN: 1461876Hom.: 0 Cov.: 31 AF XY: 0.00000688 AC XY: 5AN XY: 727242
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Pathogenic:2Uncertain:2
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
BODY MASS INDEX QUANTITATIVE TRAIT LOCUS 20 Pathogenic:1
Pathogenic, no assertion criteria provided | literature only | OMIM | Jul 01, 2001 | - - |
not provided Pathogenic:1
Likely pathogenic, criteria provided, single submitter | clinical testing | CeGaT Center for Human Genetics Tuebingen | Jan 01, 2022 | - - |
Obesity Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Illumina Laboratory Services, Illumina | Aug 22, 2017 | This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. However, the evidence from the literature, in combination with allele frequency data from public databases where available, was not sufficient to rule this variant in or out of causing disease. Therefore, this variant is classified as a variant of unknown significance. - |
MC4R-related condition Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | PreventionGenetics, part of Exact Sciences | Dec 08, 2023 | The MC4R c.821A>G variant is predicted to result in the amino acid substitution p.Asn274Ser. This variant has been reported in multiple individuals with severe obesity (Mergen et al. 2001. PubMed ID: 11443223; Stutzmann et al. 2008. PubMed ID: 18559663; Reinehr et al. 2009. PubMed ID: 18997677; Yurtcu et al. 2009. PubMed ID: 19184404; Rouskas et al. 2012. PubMed ID: 22447289; Mühlhaus et al. 2012. PubMed ID: 22688572; Aykut et al. 2020. PubMed ID: 32185475); however, it has also been detected at least twice in control cohorts of non-obese individuals (Yurtcu et al. 2009. PubMed ID: 19184404; Rouskas et al. 2012. PubMed ID: 22447289). Moreover, in vitro studies have demonstrated that MC4R protein carrying the p.Asn274Ser variant has normal cell surface expression and ligand binding affinity comparable to wild type protein (Tao et al. 2003. PubMed ID: 12959994; Xiang et al. 2006. PubMed ID: 16752916). Additional experiments also found similar levels of cyclic AMP production and MAPK signaling pathway activation following stimulation by endogenous and synthetic receptor agonists (Tao et al. 2003. PubMed ID: 12959994; Xiang et al. 2006. PubMed ID: 16752916; He et al. 2014. PubMed ID: 25332687). This variant is reported in 0.0018% of alleles in individuals of European (Non-Finnish) descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
Cadd
Uncertain
Dann
Uncertain
DEOGEN2
Uncertain
D
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D
M_CAP
Uncertain
D
MetaRNN
Pathogenic
D
MetaSVM
Uncertain
T
MutationAssessor
Uncertain
M
MutationTaster
Benign
A
PrimateAI
Uncertain
T
PROVEAN
Uncertain
D
REVEL
Uncertain
Sift
Benign
T
Sift4G
Benign
T
Polyphen
D
Vest4
MutPred
Gain of glycosylation at N274 (P = 0.0396);
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at