dbSNP rs61741819: MC4R:p.Ile198Ile (chr18-60371756-G-A) – ACMG Classification: Benign (-18 pts)

Variant summary

Our verdict is Benign. The variant received -18 ACMG points: 0P and 18B. BP4_ModerateBP6_Very_StrongBS1BS2

The NM_005912.3(MC4R):c.594C>T(p.Ile198Ile) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00224 in 1,614,182 control chromosomes in the GnomAD database, including 74 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. I198I) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.011 ( 35 hom., cov: 32)

Exomes 𝑓: 0.0013 ( 39 hom. )

Consequence

MC4R
NM_005912.3 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: 0.806

Publications

13 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: Benign. The variant received -18 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.46).

BP6

Variant 18-60371756-G-A is Benign according to our data. Variant chr18-60371756-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 259890.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0111 (1690/152310) while in subpopulation AFR AF = 0.0381 (1585/41558). AF 95% confidence interval is 0.0366. There are 35 homozygotes in GnomAd4. There are 811 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 1690 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005912.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MC4R	NM_005912.3	MANE Select	c.594C>T	p.Ile198Ile	synonymous	Exon 1 of 1	NP_005903.2	P32245

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
MC4R	ENST00000299766.5	TSL:6 MANE Select	c.594C>T	p.Ile198Ile	synonymous	Exon 1 of 1	ENSP00000299766.3	P32245
ENSG00000285681	ENST00000650201.1		n.113+42411G>A		intron	N/A
ENSG00000285681	ENST00000658928.1		n.156+42411G>A		intron	N/A

Frequencies

GnomAD3 genomes

AF:

0.0111

AC:

1693

AN:

152192

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0383

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00353

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000206

Gnomad OTH

AF:

0.00767

GnomAD2 exomes

AF:

0.00316

AC:

793

AN:

251344

AF XY:

0.00250

show subpopulations

Gnomad AFR exome

AF:

0.0365

Gnomad AMR exome

AF:

0.00194

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000123

Gnomad OTH exome

AF:

0.00114

GnomAD4 exome

AF:

0.00132

AC:

1928

AN:

1461872

Hom.:

Cov.:

AF XY:

0.00130

AC XY:

942

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.0393

AC:

1315

AN:

33476

American (AMR)

AF:

0.00192

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00369

AC:

318

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00139

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000603

AC:

AN:

1112010

Other (OTH)

AF:

0.00222

AC:

134

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

132

264

395

527

659

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

126

168

210

<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:

0.0111

AC:

1690

AN:

152310

Hom.:

Cov.:

AF XY:

0.0109

AC XY:

811

AN XY:

74474

show subpopulations

African (AFR)

AF:

0.0381

AC:

1585

AN:

41558

American (AMR)

AF:

0.00353

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.00414

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000206

AC:

AN:

68036

Other (OTH)

AF:

0.00759

AC:

AN:

2108

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

153

230

306

383

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<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:

0.00865

Hom.:

Bravo

AF:

0.0123

Asia WGS

AF:

0.00260

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.000119

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (3)

not specified (2)

Obesity (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.46

CADD

Benign

6.0

(source)

DANN

Benign

0.73

PhyloP100

0.81

Mutation Taster

=100/0

polymorphism

(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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over