19-17837938-G-T

Position:

chr19-17837938-G-T

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PP4_ModeratePVS1PM2_Supporting

This summary comes from the ClinGen Evidence Repository: The NM_000215.4(JAK3):c.1695C>A (p.Cys565Ter) variant in exon 11 of JH2 domain of JAK3 results in a disrupted protein product PVS1. The variant is also known as the C1790A variant (PMID 17433830). The filtering allele frequency in gnomAD v4.1.0 is 0.000002470 (7/1179982 alleles) in European (non-Finnish) population, which is lower than the ClinGen SCID VCEP threshold (<0.000115) for PM2_Supporting. Additionally, no homozygotes have been observed in gnomAD. (PM2_Supporting). At least one patient in the literature presents Diagnostic criteria for SCID (0.5pt) + Reduced cytokine-induced phosphorylation of STAT5 in patient-derived T or B cells (1pt) + No kinase activity data for this mutation PMID 14615376 PID v2 panel confirmed this mutation by NGS in Kid_6 (0.5pt). Total 2 points PP4_Moderate (PMID:7481768).In summary, this variant meets the criteria to be classified as a Pathogenic 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: PVS1, PM2_Supporting, and PP4_Moderate (VCEP specifications version 1). LINK:https://erepo.genome.network/evrepo/ui/classification/CA120303/MONDO:0010938/121

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000041 ( 0 hom. )

Consequence

JAK3
NM_000215.4 stop_gained

Scores

Clinical Significance

Pathogenic reviewed by expert panel P:3

Conservation

PhyloP100: 1.52

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 Pathogenic. Variant got 11 ACMG points.

PVS1

PM2

PP4

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
JAK3	NM_000215.4 linkuse as main transcript	c.1695C>A	p.Cys565Ter	stop_gained	12/24	ENST00000458235.7
JAK3	XM_047438786.1 linkuse as main transcript	c.1695C>A	p.Cys565Ter	stop_gained	12/24
JAK3	XM_011527991.3 linkuse as main transcript	c.1695C>A	p.Cys565Ter	stop_gained	12/14
JAK3	XR_007066796.1 linkuse as main transcript	n.1745C>A		non_coding_transcript_exon_variant	12/20

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
JAK3	ENST00000458235.7 linkuse as main transcript	c.1695C>A	p.Cys565Ter	stop_gained	12/24	5	NM_000215.4	P1	P52333-1

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

152060

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251492

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135920

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000410

AC:

AN:

1461802

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727200

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000540

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000658

AC:

AN:

152060

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74264

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000324

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

T-B+ severe combined immunodeficiency due to JAK3 deficiency

Pathogenic:3

Pathogenic, no assertion criteria provided	literature only	OMIM	Nov 03, 1995	- -
Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Apr 08, 2022	This sequence change creates a premature translational stop signal (p.Cys565*) in the JAK3 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in JAK3 are known to be pathogenic (PMID: 7481768, 11668621). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with severe combined immunodeficiency (PMID: 7481768, 27577878). ClinVar contains an entry for this variant (Variation ID: 9363). For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, reviewed by expert panel	curation	ClinGen Severe Combined Immunodeficiency Variant Curation Expert Panel, ClinGen	Jun 13, 2024	The NM_000215.4(JAK3):c.1695C>A (p.Cys565Ter) variant in exon 11 of JH2 domain of JAK3 results in a disrupted protein product PVS1. The variant is also known as the C1790A variant (PMID 17433830). The filtering allele frequency in gnomAD v4.1.0 is 0.000002470 (7/1179982 alleles) in European (non-Finnish) population, which is lower than the ClinGen SCID VCEP threshold (<0.000115) for PM2_Supporting. Additionally, no homozygotes have been observed in gnomAD. (PM2_Supporting). At least one patient in the literature presents Diagnostic criteria for SCID (0.5pt) + Reduced cytokine-induced phosphorylation of STAT5 in patient-derived T or B cells (1pt) + No kinase activity data for this mutation PMID 14615376 PID v2 panel confirmed this mutation by NGS in Kid_6 (0.5pt). Total 2 points PP4_Moderate (PMID: 7481768). In summary, this variant meets the criteria to be classified as a Pathogenic 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: PVS1, PM2_Supporting, and PP4_Moderate (VCEP specifications version 1). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.63

BayesDel_noAF

Pathogenic

0.62

CADD

Pathogenic

DANN

Uncertain

0.99

Eigen

Uncertain

0.61

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.96

MutationTaster

Benign

1.0

A;A;A

Vest4

0.87

GERP RS

4.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

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

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