16-89919770-C-G

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_002386.4(MC1R):c.512C>G(p.Ala171Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000336 in 1,608,598 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A171S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00016 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000020 ( 0 hom. )

Consequence

MC1R
NM_002386.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts P:2U:2

Conservation

PhyloP100: 1.78

Variant links:

Genes affected

MC1R (HGNC:6929): (melanocortin 1 receptor) This intronless gene encodes the receptor protein for melanocyte-stimulating hormone (MSH). The encoded protein, a seven pass transmembrane G protein coupled receptor, controls melanogenesis. Two types of melanin exist: red pheomelanin and black eumelanin. Gene mutations that lead to a loss in function are associated with increased pheomelanin production, which leads to lighter skin and hair color. Eumelanin is photoprotective but pheomelanin may contribute to UV-induced skin damage by generating free radicals upon UV radiation. Binding of MSH to its receptor activates the receptor and stimulates eumelanin synthesis. This receptor is a major determining factor in sun sensitivity and is a genetic risk factor for melanoma and non-melanoma skin cancer. Over 30 variant alleles have been identified which correlate with skin and hair color, providing evidence that this gene is an important component in determining normal human pigment variation. [provided by RefSeq, Jul 2008]

MC1R links:

ENSG00000198211 (HGNC:):

ENSG00000198211 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.15547967).

BS2

High AC in GnomAd4 at 25 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MC1R	NM_002386.4 link	c.512C>G	p.Ala171Gly	missense_variant	Exon 1 of 1	ENST00000555147.2	NP_002377.4	Q01726Q1JUL4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MC1R	ENST00000555147.2 link	c.512C>G	p.Ala171Gly	missense_variant	Exon 1 of 1	6	NM_002386.4	ENSP00000451605.1		Q01726
ENSG00000198211	ENST00000556922.1 link	c.512C>G	p.Ala171Gly	missense_variant	Exon 1 of 5	2		ENSP00000451560.1		A0A0B4J269

Frequencies

GnomAD3 genomes

AF:

0.000164

AC:

AN:

152258

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000603

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000489

AC:

AN:

245442

Hom.:

AF XY:

0.0000449

AC XY:

AN XY:

133630

show subpopulations

Gnomad AFR exome

AF:

0.000579

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000199

AC:

AN:

1456222

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

724644

show subpopulations

Gnomad4 AFR exome

AF:

0.000568

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000995

GnomAD4 genome

AF:

0.000164

AC:

AN:

152376

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74514

show subpopulations

Gnomad4 AFR

AF:

0.000601

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000688

Hom.:

Bravo

AF:

0.000272

ESP6500AA

AF:

0.000456

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000495

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:2Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Melanoma, cutaneous malignant, susceptibility to, 5

Uncertain:2

Oct 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with glycine, which is neutral and non-polar, at codon 171 of the MC1R protein (p.Ala171Gly). This variant is present in population databases (rs373224783, gnomAD 0.07%), and has an allele count higher than expected for a pathogenic variant. This missense change has been observed in individual(s) with melanoma and/or skin and hair hypopigmentation (PMID: 20876876, 26197705). ClinVar contains an entry for this variant (Variation ID: 548659). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt MC1R protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Apr 04, 2024

Genomic Medicine Center of Excellence, King Faisal Specialist Hospital and Research Centre

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Tyrosinase-positive oculocutaneous albinism

Pathogenic:1

Sep 22, 2015

Yale Center for Mendelian Genomics, Yale University

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Skin and Hair Hypopigmentation

Pathogenic:1

Sep 22, 2015

University of Washington Center for Mendelian Genomics, University of Washington

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.097

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.35

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.38

.;T;T;.

Eigen

Benign

-0.55

Eigen_PC

Benign

-0.50

FATHMM_MKL

Uncertain

0.89

LIST_S2

Benign

0.84

T;.;T;T

M_CAP

Benign

0.054

MetaRNN

Benign

0.16

T;T;T;T

MetaSVM

Benign

-0.87

MutationAssessor

Benign

1.6

.;L;L;.

PROVEAN

Uncertain

-2.5

D;.;D;N

REVEL

Benign

0.059

Sift

Benign

0.065

T;.;T;D

Sift4G

Benign

0.35

T;.;T;T

Polyphen

0.029

.;B;B;.

Vest4

0.20

MVP

0.75

MPC

0.022

ClinPred

0.060

GERP RS

0.31

Varity_R

0.13

gMVP

0.31

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over