rs267598278

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PM1PP2PP5_Very_Strong

The NM_201253.3(CRB1):c.1913C>T(p.Ser638Leu) variant causes a missense change. The variant allele was found at a frequency of 0.0000123 in 1,461,806 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. S638S) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.000012 ( 0 hom. )

Consequence

CRB1
NM_201253.3 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 3.63

Publications

5 publications found

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 Gene-Disease associations (from GenCC):

hereditary macular dystrophy
Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
Leber congenital amaurosis 8
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine
retinitis pigmentosa 12
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
Leber congenital amaurosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
nanophthalmia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
pigmented paravenous retinochoroidal atrophy
Inheritance: AD Classification: SUPPORTIVE, LIMITED Submitted by: G2P, Orphanet
retinitis pigmentosa
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

CRB1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 11 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 10 uncertain in NM_201253.3

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 168 curated pathogenic missense variants (we use a threshold of 10). The gene has 18 curated benign missense variants. Gene score misZ: -1.2832 (below the threshold of 3.09). Trascript score misZ: 0.62189 (below the threshold of 3.09). GenCC associations: The gene is linked to Leber congenital amaurosis 8, retinitis pigmentosa 12, pigmented paravenous retinochoroidal atrophy, hereditary macular dystrophy, retinitis pigmentosa, Leber congenital amaurosis, nanophthalmia.

PP5

Variant 1-197421741-C-T is Pathogenic according to our data. Variant chr1-197421741-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 73455.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CRB1	NM_201253.3 link	c.1913C>T	p.Ser638Leu	missense_variant	Exon 6 of 12	ENST00000367400.8	NP_957705.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CRB1	ENST00000367400.8 link	c.1913C>T	p.Ser638Leu	missense_variant	Exon 6 of 12	1	NM_201253.3	ENSP00000356370.3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000159

AC:

AN:

251276

AF XY:

0.0000221

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000123

AC:

AN:

1461806

Hom.:

Cov.:

AF XY:

0.0000151

AC XY:

AN XY:

727204

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.000151

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000812

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53378

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000360

AC:

AN:

1111972

Other (OTH)

AF:

0.0000166

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.494

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Retinal dystrophy

Pathogenic:2

Oct 01, 2023

Dept Of Ophthalmology, Nagoya University

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:research

- -

Jan 01, 2015

NIHR Bioresource Rare Diseases, University of Cambridge

Significance:Likely pathogenic

Review Status:no assertion criteria provided

Collection Method:research

- -

Leber congenital amaurosis 8

Pathogenic:1

Mar 21, 2024

Baylor Genetics

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Retinitis pigmentosa 12;C3151202:Leber congenital amaurosis 8

Pathogenic:1

Feb 17, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces serine, which is neutral and polar, with leucine, which is neutral and non-polar, at codon 638 of the CRB1 protein (p.Ser638Leu). This variant is present in population databases (rs267598278, gnomAD 0.01%). This missense change has been observed in individual(s) with clinical features of CRB1-related conditions (PMID: 28041643, 33576794, 33633436). 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: 73455). 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 CRB1 protein function with a positive predictive value of 80%. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.070

BayesDel_noAF

Benign

-0.14

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.51

.;D;.;D;.;T

Eigen

Uncertain

0.27

Eigen_PC

Benign

0.14

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.93

D;D;.;D;D;D

M_CAP

Pathogenic

0.31

MetaRNN

Uncertain

0.68

D;D;D;D;D;D

MetaSVM

Uncertain

0.43

MutationAssessor

Uncertain

2.5

M;.;M;M;.;.

PhyloP100

3.6

PrimateAI

Benign

0.36

PROVEAN

Uncertain

-3.5

D;D;.;D;D;D

REVEL

Uncertain

0.59

Sift

Benign

0.048

D;D;.;D;D;D

Sift4G

Uncertain

0.054

T;T;.;T;T;D

Polyphen

1.0, 1.0

.;D;.;D;D;.

Vest4

0.47

MutPred

0.63

Loss of catalytic residue at S638 (P = 0.3016);.;Loss of catalytic residue at S638 (P = 0.3016);Loss of catalytic residue at S638 (P = 0.3016);.;.;

MVP

0.90

MPC

0.080

ClinPred

0.89

GERP RS

5.0

Varity_R

0.24

gMVP

0.60

Mutation Taster

=18/82

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over