rs553516665

Positions:

• chr16-89919742-C-G
• chr16-89919742-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_002386.4(MC1R):​c.484C>G​(p.Arg162Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R162P) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: MC1R NM_002386.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.88

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]

ENSG00000198211 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.22448072).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MC1R	NM_002386.4	c.484C>G	p.Arg162Gly	missense_variant	1/1	ENST00000555147.2	NP_002377.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MC1R	ENST00000555147.2	c.484C>G	p.Arg162Gly	missense_variant	1/1	6	NM_002386.4	ENSP00000451605.1
ENSG00000198211	ENST00000556922.1	c.484C>G	p.Arg162Gly	missense_variant	1/5	2		ENSP00000451560.1
MC1R	ENST00000555427.1	c.484C>G	p.Arg162Gly	missense_variant	3/4	5		ENSP00000451760.1
MC1R	ENST00000639847.1	c.484C>G	p.Arg162Gly	missense_variant	3/3	5		ENSP00000492011.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 33

ExAC AF: 0.0000165 AC: 2

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.096
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.55
CADD	Benign	8.4
DANN	Benign	0.93
DEOGEN2	Benign	0.082	.;T;T;.
Eigen	Benign	-0.84
Eigen_PC	Benign	-0.83
FATHMM_MKL	Benign	0.11	N
LIST_S2	Uncertain	0.87	D;.;D;D
M_CAP	Benign	0.0057	T
MetaRNN	Benign	0.22	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.69	.;N;N;.
PROVEAN	Benign	0.36	N;.;N;N
REVEL	Benign	0.079
Sift	Benign	0.17	T;.;T;T
Sift4G	Benign	0.54	T;.;T;T
Polyphen		0.0010	.;B;B;.
Vest4		0.060
MutPred		0.29		Loss of methylation at R162 (P = 0.01);Loss of methylation at R162 (P = 0.01);Loss of methylation at R162 (P = 0.01);Loss of methylation at R162 (P = 0.01);
MVP		0.56
MPC		0.017
ClinPred		0.34	T
GERP RS		2.6
Varity_R		0.10
gMVP		0.45

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: rs553516665; hg19: chr16-89986150;