rs1553153135

Variant names:

• chr1-68439294-A-G
• rs1553153135
• NM_000329.3:c.755T>C

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM2_Supporting PP3_Moderate PP1 PP4 PM3

This summary comes from the ClinGen Evidence Repository: NM_000329.3(RPE65):c.755T>C (p.Phe252Ser) is a missense variant in exon 8 of 14, changing the phenylalanine at position 252 to serine. The variant is absent from gnomAD v.2.1.1 (PM2_Supporting). The computational predictor REVEL gives a score of 0.986, which is above the ClinGen LCA/eoRD VCEP threshold of ≥0.774 and predicts a damaging effect on RPE65 function (PP3_Moderate). This variant has been reported in at least 1 proband with early-onset severe retinal dystrophy who is compound heterozygous with the NM_000329.3(RPE65):c.1360del (p.Thr454LeufsTer?) variant confirmed in trans (1 point, PMIDs:28130426), which was previously classified pathogenic by the ClinGen LCA/eoRD VCEP (1 total point, PM3). NM_000329.3(RPE65):c.755T>C (p.Phe252Ser) has been reported to segregate with childhood-onset severe retinal dystrophy through the proband plus 1 similarly affected relative, with the variant present in the compound heterozygous state (PP1; PMID:28130426). At least one proband (RF.T.111, patient II-I) harboring this variant exhibits a phenotype including severely decreased ERG responses (0.5 pt), optic disc pallor (0.5pt), pigmentary retinopathy with attenuated vessels (0.5 pt), symptomatic onset between birth an age five years (1 pt), decreased peripheral vision (1 pt), abnormal color vision (1 pt), decreased central visual acuity (1 pt), and nystagmus (1 pt), which together are specific for RPE65-related recessive retinopathy (6.5 points, PMID:28130426, 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, PM3, PP1, PP3_moderate, and PP4. (VCEP specifications version 1.0.0; date of approval 09/21/2023). LINK:https://erepo.genome.network/evrepo/ui/classification/CA340745829/MONDO:0100368/120

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: RPE65 NM_000329.3 missense
• Clinical Significance: Likely pathogenic reviewed by expert panel P:3 U:2
• Conservation: PhyloP100: 8.95
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• retinitis pigmentosa

  Inheritance: AD, AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, G2P
• Leber congenital amaurosis 2

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• RPE65-related recessive retinopathy

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen, Ambry Genetics
• RPE65-related dominant retinopathy

  Inheritance: AD Classification: STRONG Submitted by: ClinGen
• retinitis pigmentosa 20

  Inheritance: AR, AD Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• Leber congenital amaurosis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• severe early-childhood-onset retinal dystrophy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• retinitis pigmentosa 87 with choroidal involvement

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

LOC124904198 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 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.
• PP1: 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.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000329.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RPE65	NM_000329.3	MANE Select	c.755T>C	p.Phe252Ser	missense	Exon 8 of 14	NP_000320.1
	RPE65	NM_001406853.1		c.647T>C	p.Phe216Ser	missense	Exon 7 of 13	NP_001393782.1
	RPE65	NM_001406856.1		c.479T>C	p.Phe160Ser	missense	Exon 7 of 13	NP_001393785.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RPE65	ENST00000262340.6	TSL:1 MANE Select	c.755T>C	p.Phe252Ser	missense	Exon 8 of 14	ENSP00000262340.5
	RPE65	ENST00000713936.1		n.*660T>C		non_coding_transcript_exon	Exon 9 of 15	ENSP00000519233.1
	RPE65	ENST00000713937.1		n.755T>C		non_coding_transcript_exon	Exon 8 of 13	ENSP00000519234.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461638 Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1 AN XY: 727118

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26130

East Asian (EAS) AF: 0.00 AC: 0 AN: 39686

South Asian (SAS) AF: 0.00 AC: 0 AN: 86252

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53266

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00000270 AC: 3 AN: 1111944

Other (OTH) AF: 0.00 AC: 0 AN: 60390

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:3 Uncertain:2

Revision: reviewed by expert panel

Submissions by phenotype

Leber congenital amaurosis 2;C3151086:Retinitis pigmentosa 20 Pathogenic:1 Uncertain:1

Jan 20, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

For these reasons, this variant has been classified as Pathogenic. 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. ClinVar contains an entry for this variant (Variation ID: 556104). This missense change has been observed in individual(s) with rod-cone dystrophy (PMID: 28130426). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces phenylalanine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 252 of the RPE65 protein (p.Phe252Ser).

Jan 12, 2018

Counsyl

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com.

RPE65-related recessive retinopathy Pathogenic:1

Apr 22, 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

NM_000329.3(RPE65):c.755T>C (p.Phe252Ser) is a missense variant in exon 8 of 14, changing the phenylalanine at position 252 to serine. The variant is absent from gnomAD v.2.1.1 (PM2_Supporting). The computational predictor REVEL gives a score of 0.986, which is above the ClinGen LCA/eoRD VCEP threshold of ≥0.774 and predicts a damaging effect on RPE65 function (PP3_Moderate). This variant has been reported in at least 1 proband with early-onset severe retinal dystrophy who is compound heterozygous with the NM_000329.3(RPE65):c.1360del (p.Thr454LeufsTer?) variant confirmed in trans (1 point, PMIDs:28130426), which was previously classified pathogenic by the ClinGen LCA/eoRD VCEP (1 total point, PM3). NM_000329.3(RPE65):c.755T>C (p.Phe252Ser) has been reported to segregate with childhood-onset severe retinal dystrophy through the proband plus 1 similarly affected relative, with the variant present in the compound heterozygous state (PP1; PMID: 28130426). At least one proband (RF.T.111, patient II-I) harboring this variant exhibits a phenotype including severely decreased ERG responses (0.5 pt), optic disc pallor (0.5pt), pigmentary retinopathy with attenuated vessels (0.5 pt), symptomatic onset between birth an age five years (1 pt), decreased peripheral vision (1 pt), abnormal color vision (1 pt), decreased central visual acuity (1 pt), and nystagmus (1 pt), which together are specific for RPE65-related recessive retinopathy (6.5 points, PMID: 28130426, 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, PM3, PP1, PP3_moderate, and PP4. (VCEP specifications version 1.0.0; date of approval 09/21/2023).

not provided Pathogenic:1

Nov 01, 2021

GeneDx

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Not observed in large population cohorts (Lek et al., 2016); 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: 28130426)

not specified Uncertain:1

Jul 31, 2025

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: RPE65 c.755T>C (p.Phe252Ser) results in a non-conservative amino acid change in the encoded protein sequence. Algorithms developed to predict the effect of missense changes on protein structure and function all suggest that this variant is likely to be disruptive. The variant was absent in 250684 control chromosomes. c.755T>C has been observed in 2 siblings who were affected with retinal degeneration and were compound heterozygous with a pathogenic variant (Biswas_2017). These data indicate that the variant may be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication has been ascertained in the context of this evaluation (PMID: 28130426). ClinVar contains an entry for this variant (Variation ID: 556104). Based on the evidence outlined above, the variant was classified as VUS-possibly pathogenic.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.56	D
BayesDel_noAF	Pathogenic	0.57
CADD	Pathogenic	31
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.98	D
Eigen	Pathogenic	0.97
Eigen_PC	Pathogenic	0.92
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	D
M_CAP	Pathogenic	0.63	D
MetaRNN	Pathogenic	0.96	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.4	M
PhyloP100		8.9
PrimateAI	Pathogenic	0.89	D
PROVEAN	Pathogenic	-7.5	D
REVEL	Pathogenic	0.99
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.99
MutPred		0.77		Gain of sheet (P = 0.1208)
MVP		1.0
MPC		0.45
ClinPred		1.0	D
GERP RS		5.9
Varity_R		0.98
gMVP		0.95
Mutation Taster		=31/69	disease causing

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

Other links and lift over

dbSNP: rs1553153135; hg19: chr1-68904977;