Genetic Variant RHO:p.Arg135Trp (chr3-129530917-C-T) – ACMG Classification: Pathogenic (18 pts)

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PM1PM2PM5PP3_StrongPP5_Very_Strong

The NM_000539.3(RHO):c.403C>T(p.Arg135Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,894 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R135G) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

RHO
NM_000539.3 missense

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:15

Conservation

PhyloP100: 1.28

Variant links:

Genes affected

RHO (HGNC:10012): (rhodopsin) The protein encoded by this gene is found in rod cells in the back of the eye and is essential for vision in low-light conditions. The encoded protein binds to 11-cis retinal and is activated when light hits the retinal molecule. Defects in this gene are a cause of congenital stationary night blindness. [provided by RefSeq, Aug 2017]

RHO links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PM1

In a short_sequence_motif 'Ionic lock' involved in activated form stabilization (size 2) in uniprot entity OPSD_HUMAN there are 13 pathogenic changes around while only 0 benign (100%) in NM_000539.3

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chrnull-null-null-null is described in UniProt as null.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.994

PP5

Variant 3-129530917-C-T is Pathogenic according to our data. Variant chr3-129530917-C-T is described in ClinVar as [Pathogenic]. Clinvar id is 13028.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-129530917-C-T is described in Lovd as [Likely_pathogenic]. Variant chr3-129530917-C-T is described in Lovd as [Pathogenic]. Variant chr3-129530917-C-T is described in Lovd as [Pathogenic]. Variant chr3-129530917-C-T is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RHO	NM_000539.3 link	c.403C>T	p.Arg135Trp	missense_variant	Exon 2 of 5	ENST00000296271.4	NP_000530.1	P08100

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RHO	ENST00000296271.4 link	c.403C>T	p.Arg135Trp	missense_variant	Exon 2 of 5	1	NM_000539.3	ENSP00000296271.3		P08100

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461894

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727248

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:15

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Retinitis pigmentosa 4

Pathogenic:4

Apr 01, 1997

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Sep 01, 2020

Centre for Genomic Medicine, Manchester, Central Manchester University Hospitals

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 11, 2024

3billion

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The variant is observed at an extremely low frequency in the gnomAD v2.1.1 dataset (total allele frequency: 0.012%). Predicted Consequence/Location: Missense variant Functional studies provide strong evidence of the variant having a damaging effect on the gene or gene product (PMID: 29145636). In silico tool predictions suggest damaging effect of the variant on gene or gene product [REVEL: 0.78 (>=0.6, sensitivity 0.68 and specificity 0.92); 3Cnet: 0.83 (>=0.6, sensitivity 0.72 and precision 0.9)]. Same nucleotide change resulting in same amino acid change has been previously reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000236096 /PMID: 9054934 /3billion dataset). 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: 17982420). Different missense changes at the same codon (p.Asn965Asp, p.Asn965Lys, p.Asn965Tyr) have been reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000099172, VCV000636146 /PMID: 21911583). Therefore, this variant is classified as Pathogenic according to the recommendation of ACMG/AMP guideline. -

Feb 12, 2025

Institute of Medical Genetics and Applied Genomics, University Hospital Tübingen

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Retinitis pigmentosa

Pathogenic:4

Apr 01, 2018

Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Department of Ophthalmology and Visual Sciences Kyoto University

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Jun 23, 2019

Sharon lab, Hadassah-Hebrew University Medical Center

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Jul 24, 2023

Ophthalmic Genetics Group, Institute of Molecular and Clinical Ophthalmology Basel

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

Clinical significance based on ACMG v2.0 -

Retinal dystrophy

Pathogenic:3

Oct 01, 2023

Dept Of Ophthalmology, Nagoya University

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

- -

May 15, 2019

Blueprint Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 01, 2023

Institute of Human Genetics, Univ. Regensburg, Univ. Regensburg

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Pathogenic:2

Oct 12, 2021

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Published functional studies demonstrate a damaging effect; the variant results in the protein being retained in the ER leading to cellular apoptosis (Yu et al., 2019); Not observed in large population cohorts (gnomAD); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; This variant is associated with the following publications: (PMID: 10521250, 1862076, 8841304, 18175313, 26962691, 25101269, 26794436, 21094163, 25619725, 8486634, 30635925, 29785639, 30977563, 31239368, 31054281, 31456290, 11139241, 32100970, 33576794, 1882937, 33090715, 25356976, 33781268, 33946315, 32037395, 28559085) -

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 135 of the RHO protein (p.Arg135Trp). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with autosomal dominant retinitis pigmentosa (PMID: 1862076, 18175313, 25101269, 28559085). In at least one individual the variant was observed to be de novo. It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 13028). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is expected to disrupt RHO protein function with a positive predictive value of 95%. For these reasons, this variant has been classified as Pathogenic. -

Retinitis punctata albescens

Pathogenic:1

Apr 01, 1997

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

RHO-related disorder

Pathogenic:1

Aug 21, 2024

PreventionGenetics, part of Exact Sciences

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

The RHO c.403C>T variant is predicted to result in the amino acid substitution p.Arg135Trp. This variant has been reported in individuals with autosomal dominant retinitis pigmentosa (see for examples Sung et al. 1991. PubMed ID: 1862076; Beryozkin et al. 2016. PubMed ID: 26962691). Additionally, different substitutions of the same amino acid (p.Arg135Gly, p.Arg135Leu) have been reported in individuals with for retinitis pigmentosa (Bunge et al. 1993. PubMed ID: 8406457; Andreasson et al. 1992. PubMed ID: 1484692). In silico studies suggest that the substitution of the p.Arg135 codon affects endocytosis and protein interaction (Mokarzel-Falcón et al. 2008. PubMed ID: 18175313; Rakoczy et al. 2011, PubMed ID: 21094163). Given all the evidence, we interpret c.403C>T (p.Arg135Trp) as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.56

BayesDel_noAF

Pathogenic

0.56

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.92

Eigen

Uncertain

0.65

Eigen_PC

Uncertain

0.47

FATHMM_MKL

Uncertain

0.87

LIST_S2

Uncertain

0.91

M_CAP

Pathogenic

0.67

MetaRNN

Pathogenic

0.99

MetaSVM

Pathogenic

1.1

MutationAssessor

Pathogenic

4.6

PrimateAI

Uncertain

0.79

PROVEAN

Pathogenic

-7.0

REVEL

Pathogenic

0.93

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.97

MutPred

0.97

Loss of sheet (P = 0.3635);

MVP

0.99

MPC

0.88

ClinPred

1.0

GERP RS

2.0

Varity_R

0.99

gMVP

0.99

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