chr18-60371403-A-C

Variant names:

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 11P and 4B. PP2PP3_ModeratePP5_Very_StrongBS2

The NM_005912.3(MC4R):c.947T>G(p.Ile316Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000155 in 1,614,072 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 Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

MC4R
NM_005912.3 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:5

Conservation

PhyloP100: 8.95

Publications

18 publications found

Variant links:

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]

MC4R Gene-Disease associations (from GenCC):

inherited obesity
Inheritance: AD Classification: STRONG Submitted by: Laboratory for Molecular Medicine
obesity due to melanocortin 4 receptor deficiency
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

MC4R links:

ENSG00000285681 (HGNC:):

ENSG00000285681 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 29 curated pathogenic missense variants (we use a threshold of 10). The gene has 3 curated benign missense variants. Gene score misZ: -1.0099 (below the threshold of 3.09). Trascript score misZ: 0.30396 (below the threshold of 3.09). GenCC associations: The gene is linked to obesity due to melanocortin 4 receptor deficiency, inherited obesity.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.938

PP5

Variant 18-60371403-A-C is Pathogenic according to our data. Variant chr18-60371403-A-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 14331.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High AC in GnomAdExome4 at 23 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MC4R	NM_005912.3 link	c.947T>G	p.Ile316Ser	missense_variant	Exon 1 of 1	ENST00000299766.5	NP_005903.2	P32245

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MC4R	ENST00000299766.5 link	c.947T>G	p.Ile316Ser	missense_variant	Exon 1 of 1	6	NM_005912.3	ENSP00000299766.3	P32245
ENSG00000285681	ENST00000650201.1 link	n.113+42058A>C		intron_variant	Intron 1 of 3
ENSG00000285681	ENST00000658928.1 link	n.156+42058A>C		intron_variant	Intron 1 of 3

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152190

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000199

AC:

AN:

251428

AF XY:

0.0000294

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000157

AC:

AN:

1461882

Hom.:

Cov.:

AF XY:

0.0000193

AC XY:

AN XY:

727242

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.000255

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112006

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.484

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152190

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74366

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41452

American (AMR)

AF:

0.00

AC:

AN:

15278

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.000414

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68026

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

ExAC

AF:

0.0000494

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

BODY MASS INDEX QUANTITATIVE TRAIT LOCUS 20

Pathogenic:3

Nov 17, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Mar 20, 2003

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Dec 23, 2021

Revvity Omics, Revvity

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Obesity due to melanocortin 4 receptor deficiency

Pathogenic:1

Feb 24, 2022

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

proposed classification - variant undergoing re-assessment, contact laboratory -

Obesity

Pathogenic:1

Apr 28, 2017

Illumina Laboratory Services, Illumina

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The MC4R c.947T>G (p.Ile316Ser) variant has been reported in three studies in which it is found in a total of eight obese individuals from three families (Farooqi et al. 2003; Saeed et al. 2012; Saeed et al. 2015). The variant was identified in a homozygous state in three affected individuals, including a sibling pair, from a consanguineous family and in another unrelated individual. Another family, in which the variant segregated with disease, included one affected homozygote and three affected heterozygotes who were less obese than the homozygote. The p.Ile316Ser variant was absent from 80 controls but is reported at a frequency of 0.00036 in the South Asian population of the Exome Aggregation Consortium. Functional studies conducted in cell lines demonstrated that the p.Ile316Ser variant results in partial loss of function and a 14-fold decrease in binding affinity for MSH analog as compared to wild type protein. Furthermore, the p.Ile316Ser protein was less abundant in the plasma membrane and localized in the endoplasmic reticulum as a ubiquitinated protein (Farooqi et al. 2003; Yeo et al. 2003; Granell et al. 2010). Based on the collective evidence, the p.Ile316Ser variant is classified as likely pathogenic for obesity. This variant was observed by ICSL as part of a predisposition screen in an ostensibly healthy population. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.73

BayesDel_addAF

Uncertain

0.093

BayesDel_noAF

Pathogenic

0.16

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.73

Eigen

Pathogenic

0.84

Eigen_PC

Pathogenic

0.85

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Uncertain

0.95

M_CAP

Uncertain

0.16

MetaRNN

Pathogenic

0.94

MetaSVM

Benign

-0.63

MutationAssessor

Uncertain

2.4

PhyloP100

8.9

PrimateAI

Uncertain

0.65

PROVEAN

Uncertain

-3.8

REVEL

Pathogenic

0.67

Sift

Pathogenic

0.0

Sift4G

Uncertain

0.0030

Polyphen

0.99

Vest4

0.99

MutPred

0.78

Gain of disorder (P = 0.0157);

MVP

0.89

MPC

0.027

ClinPred

0.90

GERP RS

6.1

Varity_R

0.76

gMVP

0.97

Mutation Taster

=10/90

disease causing (ClinVar)

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over