19-17843898-T-C

Position:

chr19-17843898-T-C

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BS2_SupportingBS1

This summary comes from the ClinGen Evidence Repository: The c.187A>G (NM_000215.4) variant in JAK3 is a missense variant predicted to cause the substitution of Isoleucine by Valine at amino acid 63 (p.Ile63Val).The popmax filtering allele frequency (the upper threshold of the 95% CI) of this variant is 0.00007135 (105/1179936 alleles) for European (non-Finnish) chromosomes by gnomAD v.4, which is lower than the ClinGen SCID VCEP threshold (<0.000115) for PM2_Supporting; However, the highest MAF in the Ashkenazi Jewish population is 0.007061 (209/29600 alleles), which is above the SCID VCEP established threshold of >0.00100 for BS1. As this population is not known to have a higher prevalence, this is considered to meet BS1. One homozygote is described in gnomAD v.4 in the Ashkenazi Jewish population (BS2_Supporting).To our knowledge, this variant has not been reported in the literature in individuals affected with JAk3-SCID/related conditions or in functional studies.In summary, this variant meets the criteria to be classified as Likely Benign for autosomal recessive T-B+ severe combined immunodeficiency due to JAK3 deficiency based on the ACMG/AMP criteria applied, as specified by the ClinGen SCID VCEP. Criteria applied: BS1 and BS2_Supporting (VCEP specifications version 1.0). LINK:https://erepo.genome.network/evrepo/ui/classification/CA9302225/MONDO:0010938/121

Frequency

Genomes: 𝑓 0.00024 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00023 ( 0 hom. )

Consequence

JAK3
NM_000215.4 missense, splice_region

Scores

Clinical Significance

Likely benign reviewed by expert panel U:2B:2

Conservation

PhyloP100: 3.59

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 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BS1

BS2

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
JAK3	NM_000215.4 linkuse as main transcript	c.187A>G	p.Ile63Val	missense_variant, splice_region_variant	3/24	ENST00000458235.7
JAK3	XM_047438786.1 linkuse as main transcript	c.187A>G	p.Ile63Val	missense_variant, splice_region_variant	3/24
JAK3	XM_011527991.3 linkuse as main transcript	c.187A>G	p.Ile63Val	missense_variant, splice_region_variant	3/14
JAK3	XR_007066796.1 linkuse as main transcript	n.237A>G		splice_region_variant, non_coding_transcript_exon_variant	3/20

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
JAK3	ENST00000458235.7 linkuse as main transcript	c.187A>G	p.Ile63Val	missense_variant, splice_region_variant	3/24	5	NM_000215.4	P1	P52333-1

Frequencies

GnomAD3 genomes

AF:

0.000244

AC:

AN:

151948

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00721

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000147

Gnomad OTH

AF:

0.000960

GnomAD3 exomes

AF:

0.000347

AC:

AN:

250598

Hom.:

AF XY:

0.000339

AC XY:

AN XY:

135646

show subpopulations

Gnomad AFR exome

AF:

0.0000618

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00667

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000133

Gnomad OTH exome

AF:

0.000327

GnomAD4 exome

AF:

0.000232

AC:

339

AN:

1461508

Hom.:

Cov.:

AF XY:

0.000232

AC XY:

169

AN XY:

727062

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.0000895

Gnomad4 ASJ exome

AF:

0.00704

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000854

Gnomad4 OTH exome

AF:

0.000679

GnomAD4 genome

AF:

0.000244

AC:

AN:

151948

Hom.:

Cov.:

AF XY:

0.000175

AC XY:

AN XY:

74222

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00721

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000147

Gnomad4 OTH

AF:

0.000960

Alfa

AF:

0.000422

Hom.:

Bravo

AF:

0.000261

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000321

AC:

EpiCase

AF:

0.000436

EpiControl

AF:

0.000415

ClinVar

Significance: Likely benign

Submissions summary: Uncertain:2Benign:2

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

T-B+ severe combined immunodeficiency due to JAK3 deficiency

Uncertain:1Benign:2

Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -
Likely benign, reviewed by expert panel	curation	ClinGen Severe Combined Immunodeficiency Variant Curation Expert Panel, ClinGen	Jan 23, 2024	The c.187A>G (NM_000215.4) variant in JAK3 is a missense variant predicted to cause the substitution of Isoleucine by Valine at amino acid 63 (p.Ile63Val). The popmax filtering allele frequency (the upper threshold of the 95% CI) of this variant is 0.00007135 (105/1179936 alleles) for European (non-Finnish) chromosomes by gnomAD v.4, which is lower than the ClinGen SCID VCEP threshold (<0.000115) for PM2_Supporting; However, the highest MAF in the Ashkenazi Jewish population is 0.007061 (209/29600 alleles), which is above the SCID VCEP established threshold of >0.00100 for BS1. As this population is not known to have a higher prevalence, this is considered to meet BS1. One homozygote is described in gnomAD v.4 in the Ashkenazi Jewish population (BS2_Supporting). To our knowledge, this variant has not been reported in the literature in individuals affected with JAk3-SCID/related conditions or in functional studies. In summary, this variant meets the criteria to be classified as Likely Benign for autosomal recessive T-B+ severe combined immunodeficiency due to JAK3 deficiency based on the ACMG/AMP criteria applied, as specified by the ClinGen SCID VCEP. Criteria applied: BS1 and BS2_Supporting (VCEP specifications version 1.0). -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 29, 2024	- -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genomic Diagnostic Laboratory, Division of Genomic Diagnostics, Children's Hospital of Philadelphia

Jul 30, 2015

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Benign

-0.11

BayesDel_noAF

Benign

-0.18

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.34

T;T;.

Eigen

Benign

0.065

Eigen_PC

Benign

0.12

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.89

D;.;D

M_CAP

Benign

0.043

MetaRNN

Benign

0.012

T;T;T

MetaSVM

Benign

-0.51

MutationAssessor

Uncertain

2.0

M;M;M

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.48

PROVEAN

Benign

-0.65

N;N;N

REVEL

Uncertain

0.37

Sift

Benign

0.10

T;T;T

Sift4G

Benign

0.13

T;T;T

Polyphen

0.96

D;D;P

Vest4

0.20

MVP

0.65

MPC

0.51

ClinPred

0.032

GERP RS

5.1

Varity_R

0.13

gMVP

0.50

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over