Genetic Variant NM_000275.3:c.2497G>A (chr15-27755408-C-T) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_StrongBP6_Moderate

The NM_000275.3(OCA2):c.2497G>A(p.Val833Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000694 in 1,613,480 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000068 ( 1 hom. )

Consequence

OCA2
NM_000275.3 missense

Scores

Clinical Significance

Benign criteria provided, single submitter B:1

Conservation

PhyloP100: 1.66

Variant links:

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]

OCA2 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=0.038675606).

BP6

Variant 15-27755408-C-T is Benign according to our data. Variant chr15-27755408-C-T is described in ClinVar as [Benign]. Clinvar id is 1622620.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OCA2	NM_000275.3 link	c.2497G>A	p.Val833Met	missense_variant	Exon 24 of 24	ENST00000354638.8	NP_000266.2	Q04671-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
OCA2	ENST00000354638.8 link	c.2497G>A	p.Val833Met	missense_variant	Exon 24 of 24	1	NM_000275.3	ENSP00000346659.3		Q04671-1
OCA2	ENST00000353809.9 link	c.2425G>A	p.Val809Met	missense_variant	Exon 23 of 23	1		ENSP00000261276.8		Q04671-2

Frequencies

GnomAD3 genomes

AF:

0.0000854

AC:

AN:

152206

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00346

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000139

AC:

AN:

251168

Hom.:

AF XY:

0.000118

AC XY:

AN XY:

135800

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00308

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000353

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000677

AC:

AN:

1461274

Hom.:

Cov.:

AF XY:

0.0000757

AC XY:

AN XY:

726974

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00287

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000117

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.0000854

AC:

AN:

152206

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74362

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00346

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000360

Hom.:

Bravo

AF:

0.0000718

ExAC

AF:

0.000132

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Nov 18, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

0.00048

BayesDel_noAF

Benign

-0.13

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.56

.;D

Eigen

Benign

0.019

Eigen_PC

Benign

-0.097

FATHMM_MKL

Benign

0.35

LIST_S2

Uncertain

0.92

D;D

M_CAP

Benign

0.031

MetaRNN

Benign

0.039

T;T

MetaSVM

Uncertain

0.075

MutationAssessor

Uncertain

2.4

.;M

PrimateAI

Benign

0.44

PROVEAN

Benign

-2.0

N;N

REVEL

Uncertain

0.35

Sift

Uncertain

0.0040

D;D

Sift4G

Uncertain

0.017

D;D

Polyphen

0.95

P;P

Vest4

0.40

MutPred

0.34

.;Loss of catalytic residue at V833 (P = 0.0032);

MVP

0.92

MPC

0.46

ClinPred

0.29

GERP RS

3.8

Varity_R

0.077

gMVP

0.71

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