rs876657444

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2BP4BP6_Moderate

The NM_001289808.2(CRYAB):c.370A>G(p.Ile124Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,882 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

CRYAB
NM_001289808.2 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.357

Publications

1 publications found

Variant links:

Genes affected

CRYAB (HGNC:2389): (crystallin alpha B) Mammalian lens crystallins are divided into alpha, beta, and gamma families. Alpha crystallins are composed of two gene products: alpha-A and alpha-B, for acidic and basic, respectively. Alpha crystallins can be induced by heat shock and are members of the small heat shock protein (HSP20) family. They act as molecular chaperones although they do not renature proteins and release them in the fashion of a true chaperone; instead they hold them in large soluble aggregates. These heterogeneous aggregates consist of 30-40 subunits; the alpha-A and alpha-B subunits have a 3:1 ratio, respectively. Two additional functions of alpha crystallins are an autokinase activity and participation in the intracellular architecture. The encoded protein has been identified as a moonlighting protein based on its ability to perform mechanistically distinct functions. Alpha-A and alpha-B gene products are differentially expressed; alpha-A is preferentially restricted to the lens and alpha-B is expressed widely in many tissues and organs. Elevated expression of alpha-B crystallin occurs in many neurological diseases; a missense mutation cosegregated in a family with a desmin-related myopathy. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2019]

CRYAB Gene-Disease associations (from GenCC):

myofibrillar myopathy 2
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Orphanet
cataract 16 multiple types
Inheritance: AD, AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P
fatal infantile hypertonic myofibrillar myopathy
Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P, Orphanet
early-onset lamellar cataract
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
early-onset nuclear cataract
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
early-onset posterior polar cataract
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
familial isolated dilated cardiomyopathy
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
dilated cardiomyopathy 1II
Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

CRYAB links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.40255964).

BP6

Variant 11-111908922-T-C is Benign according to our data. Variant chr11-111908922-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 227275.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CRYAB	NM_001289808.2 link	c.370A>G	p.Ile124Val	missense_variant	Exon 3 of 3	ENST00000650687.2	NP_001276737.1	P02511V9HW27

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CRYAB	ENST00000650687.2 link	c.370A>G	p.Ile124Val	missense_variant	Exon 3 of 3		NM_001289808.2	ENSP00000499082.1		P02511

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461882

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727244

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

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:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112010

Other (OTH)

AF:

0.00

AC:

AN:

60394

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.225

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Benign:1

Mar 03, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

p.Ile124Val in exon 3 of CRYAB: This variant is not expected to have clinical si gnificance due to a lack of conservation across species, including mammals. Of n ote, fourteen mammals have a valine (Val) at this position. In addition, computa tional prediction tools do not suggest a high likelihood of impact to the protei n. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.017

BayesDel_noAF

Benign

-0.26

CADD

Benign

(source)

DANN

Benign

0.96

DEOGEN2

Uncertain

0.58

D;T;T;D;D;D;D;D;T;T;.;T

Eigen

Benign

-0.67

Eigen_PC

Benign

-0.50

FATHMM_MKL

Uncertain

0.76

LIST_S2

Benign

0.62

.;.;.;T;.;.;.;.;T;.;T;T

M_CAP

Benign

0.0095

MetaRNN

Benign

0.40

T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.42

MutationAssessor

Benign

0.43

N;.;.;N;N;N;N;N;.;.;.;.

PhyloP100

0.36

PrimateAI

Benign

0.30

PROVEAN

Benign

-0.62

N;N;N;.;N;N;N;N;N;N;N;N

REVEL

Benign

0.28

Sift

Benign

0.065

T;T;T;.;T;T;T;T;T;T;T;D

Sift4G

Benign

0.072

T;T;T;T;T;T;T;T;.;.;.;.

Polyphen

0.0010

B;.;.;B;B;B;B;B;.;.;.;.

Vest4

0.15

MutPred

0.78

Gain of ubiquitination at K121 (P = 0.1317);.;.;Gain of ubiquitination at K121 (P = 0.1317);Gain of ubiquitination at K121 (P = 0.1317);Gain of ubiquitination at K121 (P = 0.1317);Gain of ubiquitination at K121 (P = 0.1317);Gain of ubiquitination at K121 (P = 0.1317);.;Gain of ubiquitination at K121 (P = 0.1317);.;Gain of ubiquitination at K121 (P = 0.1317);

MVP

0.73

MPC

0.22

ClinPred

0.13

GERP RS

1.9

Varity_R

0.14

gMVP

0.22

Mutation Taster

=89/11

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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rs876657444

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