VCV001705444.3 - ClinVar

NM_000275.3(OCA2):c.163dup (p.Ala55fs)

Germline

Classification

The aggregate germline classification for this variant, typically for a monogenic or Mendelian disorder as in the ACMG/AMP guidelines, or for response to a drug. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the aggregate classification.

(3)

Stars represent the aggregate review status, or the level of review supporting the aggregate germline classification for this VCV record. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status. The number of submissions which contribute to this review status is shown in parentheses.

Pathogenic/Likely pathogenic

criteria provided, multiple submitters, no conflicts

Somatic

No data submitted for somatic clinical impact

Somatic

No data submitted for oncogenicity

Variant Details

Identifiers

NM_000275.3(OCA2):c.163dup (p.Ala55fs)

Variation ID: 1705444 Accession: VCV001705444.3

Type and length

Duplication, 1 bp

Location

Cytogenetic: 15q13.1 15: 28081711-28081712 (GRCh38) [ NCBI UCSC ] 15: 28326857-28326858 (GRCh37) [ NCBI UCSC ]

Timeline in ClinVar

	First in ClinVar Help The date this variant first appeared in ClinVar with each type of classification.	Last submission Help The date of the most recent submission for each type of classification for this variant.	Last evaluated Help The most recent date that a submitter evaluated this variant for each type of classification.
Germline	Sep 17, 2022	Feb 20, 2024	Jul 18, 2023

HGVS

Nucleotide	Protein	Molecular consequence
NM_000275.3:c.163dup MANE Select Help Transcripts from the Matched Annotation from the NCBI and EMBL-EBI (MANE) collaboration.	NP_000266.2:p.Ala55fs	frameshift
NM_001300984.2:c.163dup	NP_001287913.1:p.Ala55fs	frameshift
NC_000015.10:g.28081717dup
NC_000015.9:g.28326863dup
NG_009846.1:g.22601dup

... more HGVS ... less HGVS

Protein change

A55fs

Other names

Canonical SPDI

NC_000015.10:28081711:CCCCCC:CCCCCCC

Functional consequence Help The effect of the variant on RNA or protein function, based on experimental evidence from submitters.

Global minor allele frequency (GMAF) Help The global minor allele frequency calculated by the 1000 Genomes Project. The minor allele at this location is indicated in parentheses and may be different from the allele represented by this VCV record.

Allele frequency Help The frequency of the allele represented by this VCV record.

Links

VarSome

Genes

Gene	OMIM	ClinGen Gene Dosage Sensitivity Curation		Variation Viewer Help Links to Variation Viewer, a genome browser to view variation data from NCBI databases.	Related variants
Gene	OMIM	HI score Help The haploinsufficiency score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.	TS score Help The triplosensitivity score for the gene, curated by ClinGen’s Dosage Sensitivity Curation task team.		Within gene Help The number of variants in ClinVar that are contained within this gene, with a link to view the list of variants.	All Help The number of variants in ClinVar for this gene, including smaller variants within the gene and larger CNVs that overlap or fully contain the gene.
OCA2		-	-	GRCh38 GRCh38 GRCh38 GRCh37	1314	1623

Conditions - Germline

Condition Help The condition for this variant-condition (RCV) record in ClinVar.	Classification Help The aggregate germline classification for this variant-condition (RCV) record in ClinVar. The number of submissions that contribute to this aggregate classification is shown in parentheses. (# of submissions)	Review status Help The aggregate review status for this variant-condition (RCV) record in ClinVar. This value is calculated by NCBI based on data from submitters. Read our rules for calculating the review status.	Last evaluated Help The most recent date that a submitter evaluated this variant for the condition.	Variation/condition record Help The RCV accession number, with most recent version number, for the variant-condition record, with a link to the RCV web page.
Tyrosinase-positive oculocutaneous albinism	Likely pathogenic (1)	criteria provided, single submitter	Sep 1, 2022	RCV002283758.1
not provided	Pathogenic (1)	criteria provided, single submitter	Jul 18, 2023	RCV003718473.2
SKIN/HAIR/EYE PIGMENTATION 1, BLUE/NONBLUE EYES	Likely pathogenic (1)	criteria provided, single submitter	Jun 5, 2023	RCV003471310.1

Submissions - Germline

Classification Help The submitted germline classification for each SCV record. (Last evaluated)	Review status Help Stars represent the review status, or the level of review supporting the submitted (SCV) record. This value is calculated by NCBI based on data from the submitter. Read our rules for calculating the review status. This column also includes a link to the submitter’s assertion criteria if provided, and the collection method. (Assertion criteria)	Condition Help The condition for the classification, provided by the submitter for this submitted (SCV) record. This column also includes the affected status and allele origin of individuals observed with this variant.	Submitter Help The submitting organization for this submitted (SCV) record. This column also includes the SCV accession and version number, the date this SCV first appeared in ClinVar, and the date that this SCV was last updated in ClinVar.	More information Help This column includes more information supporting the classification, including citations, the comment on classification, and detailed evidence provided as observations of the variant by the submitter.
Likely pathogenic (Sep 01, 2022)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	Tyrosinase-positive oculocutaneous albinism Affected status: yes Allele origin: germline	3billion Accession: SCV002572817.1 First in ClinVar: Sep 17, 2022 Last updated: Sep 17, 2022	Comment: The variant is not observed in the gnomAD v2.1.1 dataset. Frameshift variant is predicted to result in a loss or disruption of normal protein function … (more) The variant is not observed in the gnomAD v2.1.1 dataset. Frameshift variant is predicted to result in a loss or disruption of normal protein function through nonsense-mediated decay (NMD) or protein truncation. Multiple pathogenic variants are reported downstream of the variant. Therefore, this variant is classified as Likely pathogenic according to the recommendation of ACMG/AMP guideline. (less) Clinical Features: Ocular albinism (present)
Likely pathogenic (Jun 05, 2023)	criteria provided, single submitter (ACMG Guidelines, 2015) Method: clinical testing	SKIN/HAIR/EYE PIGMENTATION 1, BLUE/NONBLUE EYES Affected status: unknown Allele origin: unknown	Baylor Genetics Accession: SCV004209029.1 First in ClinVar: Dec 30, 2023 Last updated: Dec 30, 2023
Pathogenic (Jul 18, 2023)	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015)) Method: clinical testing	not provided Affected status: unknown Allele origin: germline	Labcorp Genetics (formerly Invitae), Labcorp Accession: SCV004503360.1 First in ClinVar: Feb 20, 2024 Last updated: Feb 20, 2024	Publications: PubMed (3) PubMed: 30414346‚ 19865097‚ 21541274 Comment: ClinVar contains an entry for this variant (Variation ID: 1705444). For these reasons, this variant has been classified as Pathogenic. This premature translational stop signal … (more) ClinVar contains an entry for this variant (Variation ID: 1705444). For these reasons, this variant has been classified as Pathogenic. This premature translational stop signal has been observed in individual(s) with oculocutaneous albinism (PMID: 30414346). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This sequence change creates a premature translational stop signal (p.Ala55Glyfs*36) in the OCA2 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in OCA2 are known to be pathogenic (PMID: 19865097, 21541274). (less)

Comment:

The variant is not observed in the gnomAD v2.1.1 dataset. Frameshift variant is predicted to result in a loss or disruption of normal protein function through nonsense-mediated decay (NMD) or protein truncation. Multiple pathogenic variants are reported downstream of the variant. Therefore, this variant is classified as Likely pathogenic according to the recommendation of ACMG/AMP guideline.

Comment:

ClinVar contains an entry for this variant (Variation ID: 1705444). For these reasons, this variant has been classified as Pathogenic. This premature translational stop signal has been observed in individual(s) with oculocutaneous albinism (PMID: 30414346). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This sequence change creates a premature translational stop signal (p.Ala55Glyfs*36) in the OCA2 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in OCA2 are known to be pathogenic (PMID: 19865097, 21541274).

Germline Functional Evidence

There is no functional evidence in ClinVar for this variation. If you have generated functional data for this variation, please consider submitting that data to ClinVar.

Comment:

Citations for germline classification of this variant

Title	Author	Journal	Year	Link
Multigene panel sequencing of established and candidate melanoma susceptibility genes in a large cohort of Dutch non-CDKN2A/CDK4 melanoma families.	Potjer TP	International journal of cancer	2019	PMID: 30414346
Screening of TYR, OCA2, GPR143, and MC1R in patients with congenital nystagmus, macular hypoplasia, and fundus hypopigmentation indicating albinism.	Preising MN	Molecular vision	2011	PMID: 21541274
A comprehensive analysis reveals mutational spectra and common alleles in Chinese patients with oculocutaneous albinism.	Wei A	The Journal of investigative dermatology	2010	PMID: 19865097

Text-mined citations for this variant ...

Record last updated Sep 29, 2024

ClinVar Genomic variation as it relates to human health

NM_000275.3(OCA2):c.163dup (p.Ala55fs)

Variant Details

Genes

Conditions - Germline

Submissions - Germline

Germline Functional Evidence

Citations for germline classification of this variant

Text-mined citations for this variant ...