15-28018482-G-C

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_000275.3(OCA2):c.722C>G(p.Pro241Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00139 in 1,613,584 control chromosomes in the GnomAD database, including 54 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P241L) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0021 ( 5 hom., cov: 33)

Exomes 𝑓: 0.0013 ( 49 hom. )

Consequence

OCA2
NM_000275.3 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 0.998

Publications

8 publications found

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 Gene-Disease associations (from GenCC):

oculocutaneous albinism type 2
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics, G2P, ClinGen

OCA2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0029698312).

BP6

Variant 15-28018482-G-C is Benign according to our data. Variant chr15-28018482-G-C is described in ClinVar as Benign. ClinVar VariationId is 284034.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BA1

GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.0528 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
OCA2	NM_000275.3 link	c.722C>G	p.Pro241Arg	missense_variant	Exon 7 of 24	ENST00000354638.8	NP_000266.2	Q04671-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
OCA2	ENST00000354638.8 link	c.722C>G	p.Pro241Arg	missense_variant	Exon 7 of 24	1	NM_000275.3	ENSP00000346659.3	Q04671-1
OCA2	ENST00000353809.9 link	c.722C>G	p.Pro241Arg	missense_variant	Exon 7 of 23	1		ENSP00000261276.8	Q04671-2
OCA2	ENST00000431101.1 link	c.722C>G	p.Pro241Arg	missense_variant	Exon 7 of 7	3		ENSP00000415431.1	C9JDV3
OCA2	ENST00000445578.5 link	c.574-2296C>G		intron_variant	Intron 5 of 5	3		ENSP00000414425.1	C9JLG9

Frequencies

GnomAD3 genomes

AF:

0.00214

AC:

325

AN:

152178

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00375

Gnomad EAS

AF:

0.0583

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00460

AC:

1145

AN:

248756

AF XY:

0.00419

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00339

Gnomad EAS exome

AF:

0.0596

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000357

Gnomad OTH exome

AF:

0.00214

GnomAD4 exome

AF:

0.00131

AC:

1914

AN:

1461292

Hom.:

Cov.:

AF XY:

0.00128

AC XY:

929

AN XY:

726970

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33472

American (AMR)

AF:

0.000112

AC:

AN:

44700

Ashkenazi Jewish (ASJ)

AF:

0.00398

AC:

104

AN:

26128

East Asian (EAS)

AF:

0.0420

AC:

1669

AN:

39692

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86222

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53120

Middle Eastern (MID)

AF:

0.000347

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.0000252

AC:

AN:

1111860

Other (OTH)

AF:

0.00169

AC:

102

AN:

60332

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

116

232

348

464

580

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

102

136

170

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00213

AC:

324

AN:

152292

Hom.:

Cov.:

AF XY:

0.00238

AC XY:

177

AN XY:

74466

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41546

American (AMR)

AF:

0.000196

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00375

AC:

AN:

3470

East Asian (EAS)

AF:

0.0582

AC:

302

AN:

5188

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.0000942

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68022

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.498

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000483

Hom.:

Bravo

AF:

0.00224

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ExAC

AF:

0.00404

AC:

490

Asia WGS

AF:

0.0110

AC:

AN:

3476

EpiCase

AF:

0.000164

EpiControl

AF:

0.00

ClinVar

Significance: Benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

not specified

Benign:1

Nov 09, 2015

Eurofins Ntd Llc (ga)

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Tyrosinase-positive oculocutaneous albinism

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

OCA2-related disorder

Benign:1

Feb 22, 2019

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.084

BayesDel_addAF

Benign

-0.43

BayesDel_noAF

Benign

-0.35

CADD

Benign

(source)

DANN

Benign

0.89

DEOGEN2

Benign

0.37

.;T;.

Eigen

Benign

-0.61

Eigen_PC

Benign

-0.74

FATHMM_MKL

Benign

0.15

LIST_S2

Benign

0.73

T;T;.

MetaRNN

Benign

0.0030

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.3

M;M;.

PhyloP100

1.0

PrimateAI

Benign

0.38

PROVEAN

Uncertain

-2.5

N;N;D

REVEL

Benign

0.15

Sift

Benign

0.19

T;T;T

Sift4G

Benign

0.25

T;T;D

Polyphen

0.75

P;P;.

Vest4

0.22

MVP

0.68

MPC

0.22

ClinPred

0.054

GERP RS

1.4

Varity_R

0.041

gMVP

0.39

Mutation Taster

=97/3

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over