chr2-97724039-G-T

Variant names:

• chr2-97724039-G-T
• rs1559319752
• NM_001079.4:c.3G>T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PVS1_Supporting PM2

The NM_001079.4(ZAP70):​c.3G>T​(p.Met1?) variant causes a start lost change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: ZAP70 NM_001079.4 start_lost
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 4.77

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PVS1: Start lost variant, no pathogenic variants between lost start and next in-frame start position. Next in-frame start position is after 29 codons. Genomic position: 97724121. Lost 0.046 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ZAP70	NM_001079.4	c.3G>T	p.Met1?	start_lost	Exon 3 of 14	ENST00000264972.10	NP_001070.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ZAP70	ENST00000264972.10	c.3G>T	p.Met1?	start_lost	Exon 3 of 14	1	NM_001079.4	ENSP00000264972.5
ZAP70	ENST00000698508.1	c.3G>T	p.Met1?	start_lost	Exon 2 of 13			ENSP00000513759.1
ZAP70	ENST00000483781.5	n.196G>T		non_coding_transcript_exon_variant	Exon 3 of 7	2
ZAP70	ENST00000698509.1	n.143G>T		non_coding_transcript_exon_variant	Exon 1 of 12

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1397530 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 691318

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

Submissions by phenotype

not provided Uncertain:1

Sep 16, 2018

Gharavi Laboratory, Columbia University

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: research

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Uncertain	-0.040
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.57	D
Eigen	Benign	-0.074
Eigen_PC	Benign	0.061
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.90	D
M_CAP	Uncertain	0.12	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Benign	-0.70	T
PROVEAN	Benign	-2.1	N
REVEL	Uncertain	0.40
Sift	Benign	0.030	D
Sift4G	Uncertain	0.056	T
Polyphen		0.0010	B
Vest4		0.84
MutPred		0.99		Gain of catalytic residue at M1 (P = 0.0518);
MVP		0.78
ClinPred		0.98	D
GERP RS		4.1
Varity_R		0.49
gMVP		0.35

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs1559319752; hg19: chr2-98340502;