NM_001079.4:c.786C>T

Variant names:

• chr2-97733208-C-T
• rs916598301
• NM_001079.4:c.786C>T

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_001079.4(ZAP70):​c.786C>T​(p.Ala262Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: ZAP70 NM_001079.4 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -3.32
• Publications: 0 publications found

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)

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).
• BP6: Variant 2-97733208-C-T is Benign according to our data. Variant chr2-97733208-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 471243.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-3.32 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001079.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ZAP70	NM_001079.4	MANE Select	c.786C>T	p.Ala262Ala	synonymous	Exon 6 of 14	NP_001070.2
	ZAP70	NM_001378594.1		c.786C>T	p.Ala262Ala	synonymous	Exon 5 of 13	NP_001365523.1
	ZAP70	NM_207519.2		c.-1344C>T		upstream_gene	N/A	NP_997402.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ZAP70	ENST00000264972.10	TSL:1 MANE Select	c.786C>T	p.Ala262Ala	synonymous	Exon 6 of 14	ENSP00000264972.5
	ZAP70	ENST00000463643.5	TSL:1	n.647C>T		non_coding_transcript_exon	Exon 5 of 13
	ZAP70	ENST00000698508.2		c.786C>T	p.Ala262Ala	synonymous	Exon 5 of 13	ENSP00000513759.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

ZAP70-Related Severe Combined Immunodeficiency Benign:1

Oct 25, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	0.61
DANN	Benign	0.72
PhyloP100		-3.3
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs916598301; hg19: chr2-98349671;