9-123370912-G-C

Variant names:

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_173689.7(CRB2):c.1859G>C(p.Cys620Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,820 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 Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

CRB2
NM_173689.7 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter P:1U:1

Conservation

PhyloP100: 9.88

Publications

5 publications found

Variant links:

Genes affected

CRB2 (HGNC:18688): (crumbs cell polarity complex component 2) This gene encodes a member of a family of proteins that are components of the Crumbs cell polarity complex. In mammals, members of this family are thought to play a role in many cellular processes in early embryonic development. A similar protein in Drosophila determines apicobasal polarity in embryonic epithelial cells. Mutations in this gene are associated with focal segmental glomerulosclerosis 9, and with ventriculomegaly with cystic kidney disease. [provided by RefSeq, Aug 2016]

CRB2 Gene-Disease associations (from GenCC):

focal segmental glomerulosclerosis 9
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae)
ventriculomegaly-cystic kidney disease
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Genomics England PanelApp, Orphanet
familial idiopathic steroid-resistant nephrotic syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
retinitis pigmentosa
Inheritance: AR Classification: LIMITED Submitted by: G2P

CRB2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.996

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CRB2	NM_173689.7 link	c.1859G>C	p.Cys620Ser	missense_variant	Exon 7 of 13	ENST00000373631.8	NP_775960.4	Q5IJ48-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
CRB2	ENST00000373631.8 link	c.1859G>C	p.Cys620Ser	missense_variant	Exon 7 of 13	1	NM_173689.7	ENSP00000362734.3	Q5IJ48-1
CRB2	ENST00000359999.7 link	c.1859G>C	p.Cys620Ser	missense_variant	Exon 7 of 10	2		ENSP00000353092.3	Q5IJ48-2
CRB2	ENST00000460253.1 link	n.863G>C		non_coding_transcript_exon_variant	Exon 2 of 9	2		ENSP00000435279.1	Q5IJ48-3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1460820

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726678

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33476

American (AMR)

AF:

0.00

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39682

South Asian (SAS)

AF:

0.00

AC:

AN:

86224

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52638

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111814

Other (OTH)

AF:

0.00

AC:

AN:

60368

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Focal segmental glomerulosclerosis 9

Pathogenic:1

Jan 08, 2015

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Ventriculomegaly-cystic kidney disease

Uncertain:1

Sep 02, 2020

Baylor Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.91

BayesDel_addAF

Pathogenic

0.47

BayesDel_noAF

Pathogenic

0.44

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

DEOGEN2

Pathogenic

0.91

.;D

Eigen

Pathogenic

0.94

Eigen_PC

Pathogenic

0.79

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.71

T;T

M_CAP

Pathogenic

0.64

MetaRNN

Pathogenic

1.0

D;D

MetaSVM

Pathogenic

1.0

MutationAssessor

Pathogenic

4.7

H;H

PhyloP100

9.9

PrimateAI

Uncertain

0.73

PROVEAN

Pathogenic

-9.9

D;D

REVEL

Pathogenic

0.94

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

D;D

Vest4

0.98

MutPred

0.98

Gain of disorder (P = 0.0412);Gain of disorder (P = 0.0412);

MVP

0.98

MPC

0.42

ClinPred

1.0

GERP RS

5.0

Varity_R

1.0

gMVP

0.97

Mutation Taster

=1/99

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over