16-89919814-G-T

Variant names:

• chr16-89919814-G-T
• rs773260532
• NM_002386.4:c.556G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The ENST00000556922.1(ENSG00000198211):​c.556G>T​(p.Val186Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000687 in 1,455,212 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 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. V186M) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: ENSG00000198211 ENST00000556922.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.223
• Publications: 0 publications found

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

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.08419925).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000556922.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MC1R	NM_002386.4	MANE Select	c.556G>T	p.Val186Leu	missense	Exon 1 of 1	NP_002377.4

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MC1R	ENST00000555147.2	TSL:6 MANE Select	c.556G>T	p.Val186Leu	missense	Exon 1 of 1	ENSP00000451605.1
	ENSG00000198211	ENST00000556922.1	TSL:2	c.556G>T	p.Val186Leu	missense	Exon 1 of 5	ENSP00000451560.1
	MC1R	ENST00000555427.1	TSL:5	c.556G>T	p.Val186Leu	missense	Exon 3 of 4	ENSP00000451760.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.87e-7 AC: 1 AN: 1455212 Hom.: 0 Cov.: 35 AF XY: 0.00000138 AC XY: 1 AN XY: 724208

African (AFR) AF: 0.00 AC: 0 AN: 33474

American (AMR) AF: 0.00 AC: 0 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 47078

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111776

Other (OTH) AF: 0.00 AC: 0 AN: 60318

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.64
CADD	Benign	0.18
DANN	Benign	0.83
DEOGEN2	Benign	0.084	T
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.6
FATHMM_MKL	Benign	0.13	N
LIST_S2	Benign	0.44	T
M_CAP	Benign	0.0050	T
MetaRNN	Benign	0.084	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.5	L
PhyloP100		-0.22
PROVEAN	Benign	-0.50	N
REVEL	Benign	0.015
Sift	Uncertain	0.0040	D
Sift4G	Benign	0.20	T
Polyphen		0.012	B
Vest4		0.031
MutPred		0.58		Loss of catalytic residue at V186 (P = 0.0447)
MVP		0.10
MPC		0.017
ClinPred		0.12	T
GERP RS		-7.8
Varity_R		0.20
gMVP		0.23

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

Other links and lift over

dbSNP: rs773260532; hg19: chr16-89986222;