rs1169420841

Variant names:

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM3_StrongPP3PP4PM2_Supporting

This summary comes from the ClinGen Evidence Repository: The NM_000329.3(RPE65):c.982C>T (p.Leu328Phe) variant is a missense variant causing a substitution of leucine with phenylalanine at position 328. This variant is present in gnomAD v.4.1.0 at a Grpmax allele frequency of 0.000003650, with 2/91076 in the South Asian population, which is lower than the ClinGen LCA/eoRD VCEP PM2_Supporting threshold of <0.0002 (PM2_Supporting). The computational predictor REVEL gives a score of 0.737, which is above the ClinGen LCA/eoRD VCEP threshold of ≥ 0.644 and predicts a damaging effect on RPE65 function (PP3). This variant has been reported in at least 4 probands with early-onset severe retinal dystrophy who were compound heterozygous with either the p.Tyr275Ter variant confirmed in trans (Pathogenic by VCEP, 1 point, PMID:31630094); the NM_000329.3(RPE65):c.639dup (p.Ala214SerfsTer20) variant suspected in trans (Pathogenic by VCEP, 0.5 pt, PMID:28393863); the p.Glu254Asp variant suspected in trans (LP by VCEP, 0.25 pt, PMID:35129589 with additional information presented in ARVO meeting abstract https://iovs.arvojournals.org/article.aspx?articleid=2767855); or the p.Leu447Pro variant confirmed in trans (VUS by VCEP, 0.25 pt, PMID:38002999), all of which were previously classified as described above by the ClinGen LCA/eoRD VCEP (2 total points, PM3_Strong). At least one proband harboring this variant exhibits a phenotype including clinical diagnosis of Leber congenital amaurosis (0.5 pt), congenital night blindness (0.5 pt), White/yellow dot deposits (2 pt), previous exome testing that did not provide an alternative explanation for visual impairment (2 pt), and symptomatic onset between birth and 5 years (1 pt), which together are specific for RPE65-related recessive retinopathy (6 points, PMIDs: 31630094, 34830511, PP4). In summary, this variant meets the criteria to be classified as Likely Pathogenic for RPE65-related recessive retinopathy based on the ACMG/AMP criteria applied, as specified by the ClinGen LCA/eoRD VCEP: PM2_Supporting, PP3, PP4, PM3_Strong (VCEP specifications version 1.0.0; date of approval 09/21/2023). LINK:https://erepo.genome.network/evrepo/ui/classification/CA340744630/MONDO:0100368/120

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

RPE65
NM_000329.3 missense

Scores

Clinical Significance

Likely pathogenic reviewed by expert panel P:3U:2

Conservation

PhyloP100: 6.32

Variant links:

Genes affected

RPE65 (HGNC:10294): (retinoid isomerohydrolase RPE65) The protein encoded by this gene is a component of the vitamin A visual cycle of the retina which supplies the 11-cis retinal chromophore of the photoreceptors opsin visual pigments. It is a member of the carotenoid cleavage oxygenase superfamily. All members of this superfamily are non-heme iron oxygenases with a seven-bladed propeller fold and oxidatively cleave carotenoid carbon:carbon double bonds. However, the protein encoded by this gene has acquired a divergent function that involves the concerted O-alkyl ester cleavage of its all-trans retinyl ester substrate and all-trans to 11-cis double bond isomerization of the retinyl moiety. As such, it performs the essential enzymatic isomerization step in the synthesis of 11-cis retinal. Mutations in this gene are associated with early-onset severe blinding disorders such as Leber congenital. [provided by RefSeq, Oct 2017]

RPE65 links:

LOC124904198 (HGNC:):

LOC124904198 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

PM2

For more information check the summary or visit ClinGen Evidence Repository.

PM3

For more information check the summary or visit ClinGen Evidence Repository.

PP3

For more information check the summary or visit ClinGen Evidence Repository.

PP4

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RPE65	NM_000329.3 link	c.982C>T	p.Leu328Phe	missense_variant	Exon 9 of 14	ENST00000262340.6	NP_000320.1	Q16518

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RPE65	ENST00000262340.6 link	c.982C>T	p.Leu328Phe	missense_variant	Exon 9 of 14	1	NM_000329.3	ENSP00000262340.5		Q16518

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152164

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251398

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135858

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461782

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727202

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152282

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74458

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000487

Hom.:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:3Uncertain:2

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Leber congenital amaurosis 2;C3151086:Retinitis pigmentosa 20

Pathogenic:1Uncertain:1

Jun 06, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces leucine, which is neutral and non-polar, with phenylalanine, which is neutral and non-polar, at codon 328 of the RPE65 protein (p.Leu328Phe). This variant is present in population databases (no rsID available, gnomAD 0.0009%). This missense change has been observed in individual(s) with autosomal recessive early onset retinal dystrophy (PMID: 28393863, 31630094, 35129589). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 556178). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt RPE65 protein function with a negative predictive value of 80%. For these reasons, this variant has been classified as Pathogenic. -

Jan 16, 2018

Counsyl

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

RPE65-related recessive retinopathy

Pathogenic:1

Dec 12, 2024

ClinGen Leber Congenital Amaurosis/early Onset Retinal Dystrophy Variant Curation Expert Panel, ClinGen

Significance: Likely pathogenic

Review Status: reviewed by expert panel

Collection Method: curation

The NM_000329.3(RPE65):c.982C>T (p.Leu328Phe) variant is a missense variant causing a substitution of leucine with phenylalanine at position 328. This variant is present in gnomAD v.4.1.0 at a Grpmax allele frequency of 0.000003650, with 2/91076 in the South Asian population, which is lower than the ClinGen LCA/eoRD VCEP PM2_Supporting threshold of <0.0002 (PM2_Supporting). The computational predictor REVEL gives a score of 0.737, which is above the ClinGen LCA/eoRD VCEP threshold of ≥ 0.644 and predicts a damaging effect on RPE65 function (PP3). This variant has been reported in at least 4 probands with early-onset severe retinal dystrophy who were compound heterozygous with either the p.Tyr275Ter variant confirmed in trans (Pathogenic by VCEP, 1 point, PMID: 31630094); the NM_000329.3(RPE65):c.639dup (p.Ala214SerfsTer20) variant suspected in trans (Pathogenic by VCEP, 0.5 pt, PMID: 28393863); the p.Glu254Asp variant suspected in trans (LP by VCEP, 0.25 pt, PMID: 35129589 with additional information presented in ARVO meeting abstract https://iovs.arvojournals.org/article.aspx?articleid=2767855); or the p.Leu447Pro variant confirmed in trans (VUS by VCEP, 0.25 pt, PMID: 38002999), all of which were previously classified as described above by the ClinGen LCA/eoRD VCEP (2 total points, PM3_Strong). At least one proband harboring this variant exhibits a phenotype including clinical diagnosis of Leber congenital amaurosis (0.5 pt), congenital night blindness (0.5 pt), White/yellow dot deposits (2 pt), previous exome testing that did not provide an alternative explanation for visual impairment (2 pt), and symptomatic onset between birth and 5 years (1 pt), which together are specific for RPE65-related recessive retinopathy (6 points, PMIDs: 31630094, 34830511, PP4). In summary, this variant meets the criteria to be classified as Likely Pathogenic for RPE65-related recessive retinopathy based on the ACMG/AMP criteria applied, as specified by the ClinGen LCA/eoRD VCEP: PM2_Supporting, PP3, PP4, PM3_Strong (VCEP specifications version 1.0.0; date of approval 09/21/2023). -

Leber congenital amaurosis 2;C3151086:Retinitis pigmentosa 20;C5231465:Retinitis pigmentosa 87 with choroidal involvement

Pathogenic:1

Mar 04, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Uncertain:1

May 16, 2024

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Reported in the published literature in at least two patients with fundus albipunctatus who also harbored an additional variant in the RPE65 gene (PMID: 28393863, 35129589); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: Brunetti-Pierri 2020[Abstract], 34830511, 35129589, 36460718, 28393863, 33952291, 31273949, 29681726, 38002999, 31630094) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.66

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Uncertain

0.12

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.92

Eigen

Pathogenic

0.76

Eigen_PC

Pathogenic

0.71

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.95

M_CAP

Uncertain

0.17

MetaRNN

Pathogenic

0.86

MetaSVM

Pathogenic

0.88

MutationAssessor

Pathogenic

3.0

PrimateAI

Uncertain

0.67

PROVEAN

Uncertain

-3.0

REVEL

Pathogenic

0.74

Sift

Uncertain

0.0050

Sift4G

Uncertain

0.0090

Polyphen

1.0

Vest4

0.75

MutPred

0.51

Gain of methylation at K332 (P = 0.1276);

MVP

0.98

MPC

0.35

ClinPred

0.99

GERP RS

4.9

Varity_R

0.61

gMVP

0.89

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