1-197427615-C-T

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 13 ACMG points: 13P and 0B. PM1PM5PP3PP5_Very_Strong

The NM_201253.3(CRB1):c.2290C>T(p.Arg764Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000102 in 1,613,922 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R764H) has been classified as Likely pathogenic.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00011 ( 0 hom. )

Consequence

CRB1
NM_201253.3 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:25O:1

Conservation

PhyloP100: 0.802

Variant links:

Genes affected

CRB1 (HGNC:2343): (crumbs cell polarity complex component 1) This gene encodes a protein which is similar to the Drosophila crumbs protein and localizes to the inner segment of mammalian photoreceptors. In Drosophila crumbs localizes to the stalk of the fly photoreceptor and may be a component of the molecular scaffold that controls proper development of polarity in the eye. Mutations in this gene are associated with a severe form of retinitis pigmentosa, RP12, and with Leber congenital amaurosis. Alternate splicing results in multiple transcript variants, some protein coding and some non-protein coding.[provided by RefSeq, Apr 2012]

CRB1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 13 ACMG points.

PM1

In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 11 uncertain in NM_201253.3

PM5

Other missense variant is known to change same aminoacid residue: Variant chr1-197427616-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 166958.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.744

PP5

Variant 1-197427615-C-T is Pathogenic according to our data. Variant chr1-197427615-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 5732.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-197427615-C-T is described in Lovd as [Likely_pathogenic]. Variant chr1-197427615-C-T is described in Lovd as [Pathogenic]. Variant chr1-197427615-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CRB1	NM_201253.3 link	c.2290C>T	p.Arg764Cys	missense_variant	Exon 7 of 12	ENST00000367400.8	NP_957705.1	P82279-1A0A7D6VM04

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CRB1	ENST00000367400.8 link	c.2290C>T	p.Arg764Cys	missense_variant	Exon 7 of 12	1	NM_201253.3	ENSP00000356370.3		P82279-1

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152084

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:

0.000208

Gnomad FIN

AF:

0.0000943

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000757

AC:

AN:

250846

Hom.:

AF XY:

0.0000811

AC XY:

AN XY:

135588

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000870

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000106

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.000108

AC:

158

AN:

1461720

Hom.:

Cov.:

AF XY:

0.000133

AC XY:

AN XY:

727160

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.000116

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.000122

Gnomad4 OTH exome

AF:

0.0000828

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152202

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74398

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:

0.000208

Gnomad4 FIN

AF:

0.0000943

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000110

Hom.:

Bravo

AF:

0.0000642

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.0000988

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:25Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:6Other:1

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Retina International

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Jul 01, 2018

CeGaT Center for Human Genetics Tuebingen

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 23, 2020

Institute of Medical Genetics and Applied Genomics, University Hospital Tübingen

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 09, 2023

Revvity Omics, Revvity

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 20, 2024

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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: 28129017, 10508521, 20956273, 31429209, 32531858, 33970760, 34003923, 34758253, 24512366, 26047050, 27670293, 28341475, 23379534, 29391521, 28559085, 31980526, 31630094, 31589614, 35119454, 34884448, 31736247, 34426522, 33969091, 34946856, 33546218, 30718709, 32507488) -

Leber congenital amaurosis 8

Pathogenic:4

Apr 11, 2023

Genome-Nilou Lab

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Laboratory of Genetics in Ophthalmology, Institut Imagine

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Mar 21, 2024

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 01, 2021

Clinical Genetics Laboratory, University Hospital Schleswig-Holstein

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Retinitis pigmentosa 12

Pathogenic:3

Genomics England Pilot Project, Genomics England

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 11, 2023

Genome-Nilou Lab

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 01, 1999

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Retinal dystrophy

Pathogenic:3

May 27, 2024

Ophthalmic Genetics Group, Institute of Molecular and Clinical Ophthalmology Basel

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

- -

Aug 12, 2019

Blueprint Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 01, 2022

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

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Retinitis pigmentosa

Pathogenic:2

Apr 01, 2021

Broad Center for Mendelian Genomics, Broad Institute of MIT and Harvard

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: curation

The p.Arg764Cys variant in CRB1 was identified in an individual with Retinitis pigmentosa, via a collaborative study between the Broad Institute's Center for Mendelian Genomics and the Pierce lab (https://oculargenomics.meei.harvard.edu/labs/pierce-lab/lab-members/). Through a review of available evidence we were able to apply the following criteria: PM2, BP4, PP1-M, PM3. Based on this evidence we have classified this variant as Likely Pathogenic. If you have any questions about the classification please reach out to the Pierce Lab. -

Apr 01, 2018

Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

CRB1-related disorder

Pathogenic:1

Dec 05, 2023

PreventionGenetics, part of Exact Sciences

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

The CRB1 c.2290C>T variant is predicted to result in the amino acid substitution p.Arg764Cys. This variant has been documented to be causative for autosomal recessive retinitis pigmentosa (RP) and autosomal recessive Leber congenital amaurosis (den Hollander et al. 1999. PubMed ID: 10508521; Wang et al. 2015. PubMed ID: 26047050; Corton et al. 2013. PubMed ID: 23379534). -

Retinitis pigmentosa 12;C1868310:Pigmented paravenous retinochoroidal atrophy;C3151202:Leber congenital amaurosis 8

Pathogenic:1

Mar 21, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Macular dystrophy

Pathogenic:1

Oct 27, 2017

Molecular Medicine, University of Leeds

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

- -

Retinitis pigmentosa 12;C3151202:Leber congenital amaurosis 8

Pathogenic:1

Oct 19, 2024

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 cysteine, which is neutral and slightly polar, at codon 764 of the CRB1 protein (p.Arg764Cys). This variant is present in population databases (rs62635654, gnomAD 0.01%). This missense change has been observed in individual(s) with CRB1-related retinopathy (PMID: 10508521, 11389483, 12700176, 20956273, 24512366, 26047050, 28129017, 28341475). 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. ClinVar contains an entry for this variant (Variation ID: 5732). An algorithm developed to predict the effect of missense changes on protein structure and function outputs the following: PolyPhen-2: "Benign". The cysteine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. For these reasons, this variant has been classified as Pathogenic. -

Retinitis pigmentosa-deafness syndrome

Pathogenic:1

Mar 01, 2023

Neuberg Centre For Genomic Medicine, NCGM

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The missense variant c.2290C>T (p.Arg764Cys) in the CRB1 gene has been reported previously in a compound heterozygous and homozygous state in individuals affected with Autosomal recessive retinitis pigmentosa. Experimental studies have shown that this missense change affects protein function (den Hollander et al., 1999; Yang et al., 2016). This variant is reported with the allele frequency (0.007%) in the gnomAD and novel in the 1000 genome database. It is submitted to ClinVar with varying interpretations as Pathogenic/ Likely Pathogenic. The amino acid Arginine at position 764 is changed to a Cysteine changing protein sequence and it might alter its composition and physico-chemical properties. The variant is predicted as damaging by SIFT. The amino acid change p.Arg764Cys in CRB1 is predicted as conserved by PhyloP across 100 vertebrates. For these reasons, this variant has been classified as Pathogenic. -

CRB1-related maculopathy

Pathogenic:1

Jan 30, 2021

Institute of Medical Molecular Genetics, University of Zurich

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Pigmented paravenous retinochoroidal atrophy

Pathogenic:1

Apr 11, 2023

Genome-Nilou Lab

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Benign

-0.073

BayesDel_noAF

Benign

-0.13

CADD

Benign

DANN

Benign

0.95

DEOGEN2

Benign

0.25

T;.;T;.;T

Eigen

Benign

-0.95

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.098

LIST_S2

Uncertain

0.89

D;.;D;D;D

M_CAP

Uncertain

0.086

MetaRNN

Pathogenic

0.74

D;D;D;D;D

MetaSVM

Benign

-0.91

MutationAssessor

Benign

1.5

.;L;L;.;.

PrimateAI

Benign

0.22

PROVEAN

Uncertain

-3.9

D;.;D;D;D

REVEL

Uncertain

0.47

Sift

Benign

0.058

T;.;T;T;T

Sift4G

Benign

0.097

T;.;T;T;T

Polyphen

0.067

B;.;B;B;.

Vest4

0.77

MVP

0.73

MPC

0.039

ClinPred

0.034

GERP RS

-1.7

Varity_R

0.15

gMVP

0.83

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