chr16-89919944-G-T

Position:

• chr16-89919944-G-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.686G>T​(p.Arg229Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,220 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
• Consequence: MC1R NM_002386.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.430

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]

(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=0.07416499).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MC1R	NM_002386.4	c.686G>T	p.Arg229Leu	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.686G>T	p.Arg229Leu	missense_variant	1/1		NM_002386.4	ENSP00000451605	P1
	ENST00000554623.1	n.868C>A		non_coding_transcript_exon_variant	2/2	3
MC1R	ENST00000555427.1	c.686G>T	p.Arg229Leu	missense_variant	3/4	5		ENSP00000451760
MC1R	ENST00000639847.1	c.686G>T	p.Arg229Leu	missense_variant	3/3	5		ENSP00000492011	P1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152220 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000193

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

GnomAD4 exome Cov.: 35

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152220 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 74364

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.075
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.57
CADD	Benign	0.0030
DANN	Benign	0.87
DEOGEN2	Benign	0.17	.;T;T;.
Eigen	Benign	-1.6
Eigen_PC	Benign	-1.8
FATHMM_MKL	Benign	0.14	N
LIST_S2	Benign	0.82	T;.;T;T
M_CAP	Benign	0.0071	T
MetaRNN	Benign	0.074	T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.3	.;M;M;.
MutationTaster	Benign	1.0	N;N
PROVEAN	Benign	-1.4	N;.;N;N
REVEL	Benign	0.012
Sift	Benign	0.047	D;.;T;D
Sift4G	Benign	0.38	T;.;T;T
Polyphen		0.0	.;B;B;.
Vest4		0.14
MutPred		0.44		Loss of MoRF binding (P = 0.0152);Loss of MoRF binding (P = 0.0152);Loss of MoRF binding (P = 0.0152);Loss of MoRF binding (P = 0.0152);
MVP		0.26
MPC		0.017
ClinPred		0.079	T
GERP RS		-8.2
Varity_R		0.081
gMVP		0.52

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: rs376780075; hg19: chr16-89986352;