rs4455261

Variant names:

Variant summary

Our verdict is Benign. The variant received -18 ACMG points: 2P and 20B. PM1BP4_StrongBP6_Very_StrongBS1BS2

The NM_004076.5(CRYBB3):c.475G>A(p.Val159Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00169 in 1,613,160 control chromosomes in the GnomAD database, including 50 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0081 ( 17 hom., cov: 32)

Exomes 𝑓: 0.0010 ( 33 hom. )

Consequence

CRYBB3
NM_004076.5 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:4

Conservation

PhyloP100: 9.29

Publications

6 publications found

Variant links:

Genes affected

CRYBB3 (HGNC:2400): (crystallin beta B3) Crystallins are separated into two classes: taxon-specific, or enzyme, and ubiquitous. The latter class constitutes the major proteins of vertebrate eye lens and maintains the transparency and refractive index of the lens. Since lens central fiber cells lose their nuclei during development, these crystallins are made and then retained throughout life, making them extremely stable proteins. Mammalian lens crystallins are divided into alpha, beta, and gamma families; beta and gamma crystallins are also considered as a superfamily. Alpha and beta families are further divided into acidic and basic groups. Seven protein regions exist in crystallins: four homologous motifs, a connecting peptide, and N- and C-terminal extensions. Beta-crystallins, the most heterogeneous, differ by the presence of the C-terminal extension (present in the basic group, none in the acidic group). Beta-crystallins form aggregates of different sizes and are able to self-associate to form dimers or to form heterodimers with other beta-crystallins. This gene, a beta basic group member, is part of a gene cluster with beta-A4, beta-B1, and beta-B2. Mutations in this gene result in cataract congenital nuclear autosomal recessive type 2. [provided by RefSeq, Feb 2013]

CRYBB3 Gene-Disease associations (from GenCC):

cataract 22 multiple types
Inheritance: AR, AD, SD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, G2P, Labcorp Genetics (formerly Invitae)
early-onset anterior polar cataract
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
early-onset nuclear cataract
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
early-onset non-syndromic cataract
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

CRYBB3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -18 ACMG points.

PM1

In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 5 uncertain in NM_004076.5

BP4

Computational evidence support a benign effect (MetaRNN=0.00620237).

BP6

Variant 22-25207051-G-A is Benign according to our data. Variant chr22-25207051-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 466359.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00806 (1227/152308) while in subpopulation AFR AF = 0.0274 (1140/41580). AF 95% confidence interval is 0.0261. There are 17 homozygotes in GnomAd4. There are 570 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 17 AR,AD,SD gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004076.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CRYBB3	NM_004076.5	MANE Select	c.475G>A	p.Val159Ile	missense	Exon 6 of 6	NP_004067.1	P26998

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CRYBB3	ENST00000215855.7	TSL:1 MANE Select	c.475G>A	p.Val159Ile	missense	Exon 6 of 6	ENSP00000215855.2	P26998
	CRYBB3	ENST00000404334.1	TSL:3	c.332G>A	p.Gly111Asp	missense	Exon 5 of 5	ENSP00000386123.1	B1AHR5

Frequencies

GnomAD3 genomes

AF:

0.00802

AC:

1220

AN:

152190

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0273

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00406

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000206

Gnomad OTH

AF:

0.00527

GnomAD2 exomes

AF:

0.00267

AC:

667

AN:

249442

AF XY:

0.00184

show subpopulations

Gnomad AFR exome

AF:

0.0277

Gnomad AMR exome

AF:

0.00494

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000152

Gnomad OTH exome

AF:

0.00506

GnomAD4 exome

AF:

0.00102

AC:

1496

AN:

1460852

Hom.:

Cov.:

AF XY:

0.000806

AC XY:

586

AN XY:

726824

show subpopulations

African (AFR)

AF:

0.0309

AC:

1032

AN:

33452

American (AMR)

AF:

0.00490

AC:

219

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.0000928

AC:

AN:

86240

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53196

Middle Eastern (MID)

AF:

0.000867

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000702

AC:

AN:

1111286

Other (OTH)

AF:

0.00255

AC:

154

AN:

60362

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.472

Heterozygous variant carriers

157

235

314

392

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

120

160

200

<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

AF:

0.00806

AC:

1227

AN:

152308

Hom.:

Cov.:

AF XY:

0.00765

AC XY:

570

AN XY:

74478

show subpopulations

African (AFR)

AF:

0.0274

AC:

1140

AN:

41580

American (AMR)

AF:

0.00405

AC:

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000206

AC:

AN:

68026

Other (OTH)

AF:

0.00521

AC:

AN:

2110

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.497

Heterozygous variant carriers

113

170

226

283

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00298

Hom.:

Bravo

AF:

0.00933

ESP6500AA

AF:

0.0245

AC:

108

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00319

AC:

387

Asia WGS

AF:

0.00115

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Cataract 22 multiple types (3)

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.22

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.21

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.040

Eigen

Pathogenic

0.71

Eigen_PC

Pathogenic

0.70

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.42

MetaRNN

Benign

0.0062

MetaSVM

Uncertain

-0.27

PhyloP100

9.3

PROVEAN

Benign

0.35

REVEL

Uncertain

0.35

Sift

Uncertain

0.021

Sift4G

Benign

0.076

Vest4

0.68

MVP

0.76

ClinPred

0.033

GERP RS

4.9

Varity_R

0.59

Mutation Taster

=77/23

polymorphism

(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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over