2-97734655-T-C

Variant names:

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_001079.4(ZAP70):c.1025T>C(p.Ile342Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000504 in 1,614,194 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00062 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00049 ( 0 hom. )

Consequence

ZAP70
NM_001079.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:2

Conservation

PhyloP100: 2.42

Publications

5 publications found

Variant links:

Genes affected

ZAP70 (HGNC:12858): (zeta chain of T cell receptor associated protein kinase 70) This gene encodes an enzyme belonging to the protein tyrosine kinase family, and it plays a role in T-cell development and lymphocyte activation. This enzyme, which is phosphorylated on tyrosine residues upon T-cell antigen receptor (TCR) stimulation, functions in the initial step of TCR-mediated signal transduction in combination with the Src family kinases, Lck and Fyn. This enzyme is also essential for thymocyte development. Mutations in this gene cause selective T-cell defect, a severe combined immunodeficiency disease characterized by a selective absence of CD8-positive T-cells. Two transcript variants that encode different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ZAP70 Gene-Disease associations (from GenCC):

combined immunodeficiency due to ZAP70 deficiency
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: ClinGen, Orphanet, Labcorp Genetics (formerly Invitae)

ZAP70 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.00992161).

BP6

Variant 2-97734655-T-C is Benign according to our data. Variant chr2-97734655-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 337634.

BS1

Variant frequency is greater than expected in population nfe. GnomAd4 allele frequency = 0.000624 (95/152350) while in subpopulation NFE AF = 0.000706 (48/68022). AF 95% confidence interval is 0.000547. There are 0 homozygotes in GnomAd4. There are 43 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ZAP70	NM_001079.4 link	c.1025T>C	p.Ile342Thr	missense_variant	Exon 9 of 14	ENST00000264972.10	NP_001070.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ZAP70	ENST00000264972.10 link	c.1025T>C	p.Ile342Thr	missense_variant	Exon 9 of 14	1	NM_001079.4	ENSP00000264972.5

Frequencies

GnomAD3 genomes

AF:

0.000631

AC:

AN:

152232

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000193

Gnomad AMI

AF:

0.0275

Gnomad AMR

AF:

0.000458

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000385

Gnomad SAS

AF:

0.000620

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000706

Gnomad OTH

AF:

0.000956

GnomAD2 exomes

AF:

0.000374

AC:

AN:

251330

AF XY:

0.000383

show subpopulations

Gnomad AFR exome

AF:

0.000246

Gnomad AMR exome

AF:

0.000260

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000660

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000491

AC:

718

AN:

1461844

Hom.:

Cov.:

AF XY:

0.000520

AC XY:

378

AN XY:

727222

show subpopulations

African (AFR)

AF:

0.000239

AC:

AN:

33480

American (AMR)

AF:

0.000313

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:

0.000116

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.0000187

AC:

AN:

53380

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.000578

AC:

643

AN:

1112006

Other (OTH)

AF:

0.000596

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

105

157

210

262

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

120

<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:

0.000624

AC:

AN:

152350

Hom.:

Cov.:

AF XY:

0.000577

AC XY:

AN XY:

74494

show subpopulations

African (AFR)

AF:

0.000192

AC:

AN:

41588

American (AMR)

AF:

0.000457

AC:

AN:

15312

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000386

AC:

AN:

5186

South Asian (SAS)

AF:

0.000621

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.0000941

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000706

AC:

AN:

68022

Other (OTH)

AF:

0.000473

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

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:

0.000423

Hom.:

Bravo

AF:

0.000597

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.00104

AC:

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000305

AC:

EpiCase

AF:

0.000600

EpiControl

AF:

0.000830

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:2

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3

Sep 15, 2020

Mayo Clinic Laboratories, Mayo Clinic

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Dec 08, 2016

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Dec 03, 2023

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Combined immunodeficiency due to ZAP70 deficiency

Uncertain:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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. -

not specified

Benign:1

Mar 22, 2023

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Variant summary: ZAP70 c.1025T>C (p.Ile342Thr) results in a non-conservative amino acid change located in the Protein kinase domain (IPR000719) of the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00037 in 251330 control chromosomes, predominantly at a frequency of 0.00066 within the Non-Finnish European subpopulation in the gnomAD database. The observed variant frequency within Non-Finnish European control individuals in the gnomAD database is approximately 2 fold of the estimated maximal expected allele frequency for a pathogenic variant in ZAP70 causing Severe Combined Immunodeficiency phenotype (0.00035), strongly suggesting that the variant is a benign polymorphism found primarily in populations of Non-Finnish European origin. To our knowledge, no occurrence of c.1025T>C in individuals affected with Severe Combined Immunodeficiency and no experimental evidence demonstrating its impact on protein function have been reported. Four clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 and classified the variant as VUS (n=3) and likely benign (n=1). Based on the evidence outlined above, the variant was classified as likely benign. -

ZAP70-Related Severe Combined Immunodeficiency

Benign:1

Jan 05, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.23

CADD

Uncertain

(source)

DANN

Benign

0.85

DEOGEN2

Benign

0.34

T;.

Eigen

Benign

-0.22

Eigen_PC

Benign

-0.020

FATHMM_MKL

Uncertain

0.90

LIST_S2

Benign

0.80

T;T

M_CAP

Benign

0.053

MetaRNN

Benign

0.0099

T;T

MetaSVM

Benign

-0.51

MutationAssessor

Benign

0.26

N;.

PhyloP100

2.4

PrimateAI

Uncertain

0.56

PROVEAN

Benign

-0.15

N;N

REVEL

Uncertain

0.30

Sift

Benign

0.67

T;T

Sift4G

Benign

0.48

T;T

Polyphen

0.27

B;.

Vest4

0.39

MVP

0.98

MPC

1.1

ClinPred

0.030

GERP RS

5.4

PromoterAI

-0.031

Neutral

(source)

Varity_R

0.31

gMVP

0.86

Mutation Taster

=46/54

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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