15-27940869-C-T

Position:

• chr15-27940869-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000275.3(OCA2):​c.1951+10915G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.206 in 152,128 control chromosomes in the GnomAD database, including 3,703 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.21 (3703 hom., cov: 33)
• Consequence: OCA2 NM_000275.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.663

Genes affected

OCA2 (HGNC:8101): (OCA2 melanosomal transmembrane protein) This gene encodes the human homolog of the mouse p (pink-eyed dilution) gene. The encoded protein is believed to be an integral membrane protein involved in small molecule transport, specifically tyrosine, which is a precursor to melanin synthesis. It is involved in mammalian pigmentation, where it may control skin color variation and act as a determinant of brown or blue eye color. Mutations in this gene result in type 2 oculocutaneous albinism. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2014]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.356 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
OCA2	NM_000275.3	c.1951+10915G>A		intron_variant		ENST00000354638.8	NP_000266.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
OCA2	ENST00000354638.8	c.1951+10915G>A		intron_variant		1	NM_000275.3	ENSP00000346659	P1
OCA2	ENST00000353809.9	c.1879+10915G>A		intron_variant		1		ENSP00000261276

Frequencies

GnomAD3 genomes AF: 0.205 AC: 31216 AN: 152010 Hom.: 3692 Cov.: 33

Gnomad AFR AF: 0.283

Gnomad AMI AF: 0.0844

Gnomad AMR AF: 0.269

Gnomad ASJ AF: 0.139

Gnomad EAS AF: 0.0112

Gnomad SAS AF: 0.370

Gnomad FIN AF: 0.168

Gnomad MID AF: 0.196

Gnomad NFE AF: 0.158

Gnomad OTH AF: 0.197

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.206 AC: 31265 AN: 152128 Hom.: 3703 Cov.: 33 AF XY: 0.211 AC XY: 15673 AN XY: 74374

Gnomad4 AFR AF: 0.284

Gnomad4 AMR AF: 0.269

Gnomad4 ASJ AF: 0.139

Gnomad4 EAS AF: 0.0112

Gnomad4 SAS AF: 0.370

Gnomad4 FIN AF: 0.168

Gnomad4 NFE AF: 0.158

Gnomad4 OTH AF: 0.195

Alfa AF: 0.179 Hom.: 490

Bravo AF: 0.206

Asia WGS AF: 0.199 AC: 691 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	0.86
DANN	Benign	0.61

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: rs1562592; hg19: chr15-28186015;