19-17826850-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BA1

This summary comes from the ClinGen Evidence Repository: NM_000215.4(JAK3):c.3268G>A is a missense variant predicted to cause substitution of Alanine by Threonine at amino acid 1090 (p.Ala1090Thr). The filtering allele frequency (the lower threshold of the 95% CI of 373/75020) of the c.3268G>A variant in JAK3 is 0.004556 for African/African American chromosomes by gnomAD v4, which is higher than the ClinGen SCID VCEP threshold (>0.00447) for BA1, and therefore meets this criterion (BA1).In summary, this variant meets the criteria to be classified as Benign for autosomal recessive severe combined immunodeficiency due to JAK3 deficiency based on the ACMG/AMP criteria applied, as specified by the ClinGen SCID VCEP: BA1 (VCEP specifications version 1). LINK:https://erepo.genome.network/evrepo/ui/classification/CA160243/MONDO:0010938/121

Frequency

Genomes: 𝑓 0.0014 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00026 ( 3 hom. )

Consequence

JAK3
NM_000215.4 missense

Scores

Clinical Significance

Benign reviewed by expert panel B:3O:1

Conservation

PhyloP100: -1.28

Publications

7 publications found

Variant links:

Genes affected

JAK3 (HGNC:6193): (Janus kinase 3) The protein encoded by this gene is a member of the Janus kinase (JAK) family of tyrosine kinases involved in cytokine receptor-mediated intracellular signal transduction. It is predominantly expressed in immune cells and transduces a signal in response to its activation via tyrosine phosphorylation by interleukin receptors. Mutations in this gene are associated with autosomal SCID (severe combined immunodeficiency disease). [provided by RefSeq, Jul 2008]

JAK3 Gene-Disease associations (from GenCC):

T-B+ severe combined immunodeficiency due to JAK3 deficiency
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, ClinGen, Orphanet

JAK3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BA1

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
JAK3	NM_000215.4 link	c.3268G>A	p.Ala1090Thr	missense_variant	Exon 24 of 24	ENST00000458235.7	NP_000206.2	P52333-1A0A024R7M7
JAK3	NM_001440439.1 link	c.3268G>A	p.Ala1090Thr	missense_variant	Exon 24 of 24		NP_001427368.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
JAK3	ENST00000458235.7 link	c.3268G>A	p.Ala1090Thr	missense_variant	Exon 24 of 24	5	NM_000215.4	ENSP00000391676.1		P52333-1

Frequencies

GnomAD3 genomes

AF:

0.00141

AC:

215

AN:

152154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00476

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000578

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00191

GnomAD2 exomes

AF:

0.000346

AC:

AN:

248674

AF XY:

0.000253

show subpopulations

Gnomad AFR exome

AF:

0.00400

Gnomad AMR exome

AF:

0.000173

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000109

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000629

Gnomad OTH exome

AF:

0.000981

GnomAD4 exome

AF:

0.000262

AC:

383

AN:

1461634

Hom.:

Cov.:

AF XY:

0.000230

AC XY:

167

AN XY:

727102

show subpopulations

African (AFR)

AF:

0.00529

AC:

177

AN:

33480

American (AMR)

AF:

0.000201

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.000151

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53170

Middle Eastern (MID)

AF:

0.000867

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000150

AC:

167

AN:

1112008

Other (OTH)

AF:

0.000315

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

109

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome 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

GnomAD4 genome

AF:

0.00141

AC:

214

AN:

152272

Hom.:

Cov.:

AF XY:

0.00137

AC XY:

102

AN XY:

74452

show subpopulations

African (AFR)

AF:

0.00472

AC:

196

AN:

41540

American (AMR)

AF:

0.000327

AC:

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.000579

AC:

AN:

5180

South Asian (SAS)

AF:

0.000207

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000735

AC:

AN:

68030

Other (OTH)

AF:

0.00189

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.497

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.000546

Hom.:

Bravo

AF:

0.00151

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00340

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000379

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Benign

Submissions summary: Benign:3Other:1

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

T-B+ severe combined immunodeficiency due to JAK3 deficiency

Benign:2

Apr 03, 2024

ClinGen Severe Combined Immunodeficiency Variant Curation Expert Panel, ClinGen

Significance:Benign

Review Status:reviewed by expert panel

Collection Method:curation

NM_000215.4(JAK3):c.3268G>A is a missense variant predicted to cause substitution of Alanine by Threonine at amino acid 1090 (p.Ala1090Thr). The filtering allele frequency (the lower threshold of the 95% CI of 373/75020) of the c.3268G>A variant in JAK3 is 0.004556 for African/African American chromosomes by gnomAD v4, which is higher than the ClinGen SCID VCEP threshold (>0.00447) for BA1, and therefore meets this criterion (BA1). In summary, this variant meets the criteria to be classified as Benign for autosomal recessive severe combined immunodeficiency due to JAK3 deficiency based on the ACMG/AMP criteria applied, as specified by the ClinGen SCID VCEP: BA1 (VCEP specifications version 1). -

Dec 16, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:1

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

The JAK3 p.Ala1090Thr variant was not identified in the literature but was identified in dbSNP (ID: rs144968714), ClinVar (classified as likely benign by Invitae) and LOVD 3.0 (variant effect not shared). The variant was identified in control databases in 127 of 280068 chromosomes at a frequency of 0.0004535 increasing the likelihood this could be a low frequency benign variant (Genome Aggregation Database March 6, 2019, v2.1.1). The variant was observed in the following populations: African in 105 of 24964 chromosomes (freq: 0.004206), Other in 6 of 7206 chromosomes (freq: 0.000833), Latino in 6 of 35430 chromosomes (freq: 0.000169) and East Asian in 3 of 19948 chromosomes (freq: 0.00015), European (non-Finnish) in 7 of 126746 chromosomes (freq: 0.000055), but was not observed in the Ashkenazi Jewish, European (Finnish), or South Asian populations. The p.Ala1090 residue is not conserved in mammals and computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) do not suggest a high likelihood of impact to the protein; however, this information is not predictive enough to rule out pathogenicity. The variant occurs outside of the splicing consensus sequence and in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, based on the above information the clinical significance of this variant cannot be determined with certainty at this time although we would lean towards a more benign role for this variant. This variant is classified as likely benign. -

not specified

Other:1

Sep 19, 2013

ITMI

Significance:not provided

Review Status:no classification provided

Collection Method:reference population

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.063

BayesDel_addAF

Benign

-0.58

BayesDel_noAF

Benign

-0.61

CADD

Benign

0.029

(source)

DANN

Benign

0.82

DEOGEN2

Benign

0.35

T;T

Eigen

Benign

-1.9

Eigen_PC

Benign

-1.9

FATHMM_MKL

Benign

0.012

LIST_S2

Benign

0.048

T;.

M_CAP

Benign

0.037

MetaRNN

Benign

0.031

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.42

N;N

PhyloP100

-1.3

PrimateAI

Benign

0.34

PROVEAN

Benign

-0.16

N;N

REVEL

Benign

0.011

Sift

Benign

0.44

T;T

Sift4G

Benign

0.56

T;T

Polyphen

0.0040

B;B

Vest4

0.025

MVP

0.43

MPC

0.34

ClinPred

0.0011

GERP RS

-3.5

Varity_R

0.11

gMVP

0.35

Mutation Taster

=90/10

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over