Submissions for variant NM_000329.3(RPE65):c.1022T>C (p.Leu341Ser)

gnomAD frequency: 0.00001  dbSNP: rs61752909

Total submissions: 13

Submitter	RCV	SCV	Clinical significance	Condition	Last evaluated	Review status	Method	Comment
ClinGen Leber Congenital Amaurosis/early Onset Retinal Dystrophy Variant Curation Expert Panel, ClinGen	RCV003764564	SCV004697398	pathogenic	RPE65-related recessive retinopathy	2024-02-20	reviewed by expert panel	curation	The NM_000329.3(RPE65):c.1022T>C (p.Leu341Ser) missense variant replaces the leucine at position 341 with serine and has been reported in several patients. At least one patient (analyzed on a 100+ retinal dystrophy gene panel testing (2 pt) in PMID: 23847139) who displayed a non-detectable ERG (2 pt), visual acuity 20/400 OD and OS (1 pt), visual field of central island only (1 pt), nystagmus (1 pt), nyctalopia (1 pt), and no pigment in peripheral retina, which is highly specific for RPE65 retinopathy (PP4_Moderate). One patient was compound heterozygous for this variant and a pathogenic pathogenic variant (c.1205_1206insCCTG classified Pathogenic by the LCA/eoRD VCEP) confirmed in trans by parental testing (PMID: 9501220) and two probands were homozygous for the variant (PMID: 9501220, PMID: 15837919) (PM3_strong). The variant has been reported to segregate with RPE65 retinopathy (confirmed by absent or severely decreased rod electroretinogram response) in the proband plus 3 affected family members, all with the compound heterozygous genotype of Leu341Ser and c.1205_1206insCCTG variants. (PP1_strong; PMID: 9501220). The computational predictor REVEL gives a score of 0.988 and predicts a damaging effect on RPE65 function (PP3_Moderate). This variant is absent from gnomAD v2.1.1 and has a Grpmax Filtering AF of 0.00005290 in gnomAD v.3.1.2 (PM2_Supporting). In summary, this variant meets the criteria to be classified as pathogenic for RPE65-related recessive retinopathy based on the ACMG/AMP criteria applied, as specified by the ClinGen LCA/eoRD VCEP: PP1_strong, PM3_strong, PP3_Moderate, PP4_Moderate, PM2_supporting. (VCEP specifications version 1.0.0; date of approval 09/21/2023).
Mendelics	RCV000986328	SCV001135301	pathogenic	Leber congenital amaurosis 2	2019-05-28	criteria provided, single submitter	clinical testing
Labcorp Genetics (formerly Invitae), Labcorp	RCV001047062	SCV001210996	pathogenic	Leber congenital amaurosis 2; Retinitis pigmentosa 20	2024-01-28	criteria provided, single submitter	clinical testing	This sequence change replaces leucine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 341 of the RPE65 protein (p.Leu341Ser). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with Leber congenital amaurosis or retinitis pigmentosa (PMID: 9501220, 18539930, 19854499, 20079931, 20683928). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 13118). 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 expected to disrupt RPE65 protein function with a positive predictive value of 95%. For these reasons, this variant has been classified as Pathogenic.
GeneDx	RCV000085141	SCV001779274	pathogenic	not provided	2021-03-19	criteria provided, single submitter	clinical testing	Not observed in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports that this variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 32865313, 32036094, 19854499, 21862650, 19753312, 30268864, 9501220, 29186038, 20079931, 20683928, 20811047, 27375040, 19117922, 18539930, 21153841, 10800710, 17964524)
3billion	RCV000986328	SCV002521281	pathogenic	Leber congenital amaurosis 2	2022-05-22	criteria provided, single submitter	clinical testing	The variant is not observed in the gnomAD v2.1.1 dataset. Missense changes are a common disease-causing mechanism. In silico tool predictions suggest damaging effect of the variant on gene or gene product (REVEL: 0.88; 3Cnet: 0.98). Same nucleotide change resulting in same amino acid change has been previously reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000013118). The variant has been reported to be in trans with a pathogenic variant as either compound heterozygous or homozygous in at least one similarly affected unrelated individual (PMID: 20079931) and to co-segregate with the disease in at least 3 similarly affected relatives/individuals in the same family or similarly affected unrelated family (PMID:9501220). Therefore, this variant is classified as pathogenic according to the recommendation of ACMG/AMP guideline.
Fulgent Genetics, Fulgent Genetics	RCV002496352	SCV002805138	pathogenic	Leber congenital amaurosis 2; Retinitis pigmentosa 20; Retinitis pigmentosa 87 with choroidal involvement	2021-08-12	criteria provided, single submitter	clinical testing
Institute of Medical Genetics and Applied Genomics, University Hospital Tübingen	RCV000013997	SCV003929442	pathogenic	Retinitis pigmentosa 20	2023-06-05	criteria provided, single submitter	clinical testing
Ophthalmic Genetics Group, Institute of Molecular and Clinical Ophthalmology Basel	RCV001831568	SCV004030303	likely pathogenic	Leber congenital amaurosis	2023-07-24	criteria provided, single submitter	research	Clinical significance based on ACMG v2.0
Baylor Genetics	RCV000986328	SCV004209209	pathogenic	Leber congenital amaurosis 2	2023-12-30	criteria provided, single submitter	clinical testing
OMIM	RCV000013997	SCV000034244	pathogenic	Retinitis pigmentosa 20	1998-03-17	no assertion criteria provided	literature only
Retina International	RCV000085141	SCV000117278	not provided	not provided		no assertion provided	not provided
Laboratory of Genetics in Ophthalmology, Institut Imagine	RCV000986328	SCV001425565	pathogenic	Leber congenital amaurosis 2		no assertion criteria provided	research
Natera, Inc.	RCV001831568	SCV002092750	pathogenic	Leber congenital amaurosis	2020-09-18	no assertion criteria provided	clinical testing