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    Topic review

    ZAP70 Gene

    View times: 7
    Submitted by: Peter Tang
    (This entry belongs to Entry Collection "MedlinePlus ")

    Definition

    Zeta chain of T cell receptor associated protein kinase 70

    1. Normal Function

    The ZAP70 gene provides instructions for making a protein called zeta-chain-associated protein kinase. This protein is part of a signaling pathway that directs the development of and turns on (activates) immune system cells called T cells. T cells identify foreign substances and defend the body against infection.

    The ZAP70 gene is important for the development and function of several types of T cells. These include cytotoxic T cells (CD8+ T cells), whose functions include destroying cells infected by viruses. The ZAP70 gene is also involved in the activation of helper T cells (CD4+ T cells). These cells direct and assist the functions of the immune system by influencing the activities of other immune system cells.

    2. Health Conditions Related to Genetic Changes

    2.1. ZAP70-related severe combined immunodeficiency

    More than 12 mutations in the ZAP70 gene have been identified in people with ZAP70-related severe combined immunodeficiency (SCID). These mutations either change single protein building blocks (amino acids) in the protein sequence or disrupt how genetic information is pieced together to make the blueprint for producing the protein.

    Mutations in the ZAP70 gene prevent the production of zeta-chain-associated protein kinase or result in a protein that is unstable and cannot perform its function. A loss of functional zeta-chain-associated protein kinase leads to the absence of CD8+ T cells and an excess of inactive CD4+ T cells. The resulting shortage of active T cells causes people with ZAP70-related SCID to be more susceptible to infection.

    3. Other Names for This Gene

    • FLJ17670

    • FLJ17679

    • SRK

    • STD

    • syk-related tyrosine kinase

    • TZK

    • ZAP-70

    • ZAP70_HUMAN

    • zeta chain of T cell receptor associated protein kinase 70kDa

    • zeta chain of T-cell receptor associated protein kinase 70

    • zeta-chain (TCR) associated protein kinase 70kDa

    • zeta-chain associated protein kinase 70kDa

    • zeta-chain associated protein kinase, 70kD

    The entry is from https://medlineplus.gov/genetics/gene/zap70

    References

    1. Elder ME. SCID due to ZAP-70 deficiency. J Pediatr Hematol Oncol. 1997Nov-Dec;19(6):546-50. Review.
    2. Elder ME. T-cell immunodeficiencies. Pediatr Clin North Am. 2000Dec;47(6):1253-74. Review.
    3. Grunebaum E, Sharfe N, Roifman CM. Human T cell immunodeficiency: when signal transduction goes wrong. Immunol Res. 2006;35(1-2):117-26. Review.
    4. Picard C, Dogniaux S, Chemin K, Maciorowski Z, Lim A, Mazerolles F,Rieux-Laucat F, Stolzenberg MC, Debre M, Magny JP, Le Deist F, Fischer A, Hivroz C. Hypomorphic mutation of ZAP70 in human results in a late onsetimmunodeficiency and no autoimmunity. Eur J Immunol. 2009 Jul;39(7):1966-76. doi:10.1002/eji.200939385.
    5. Roifman CM, Dadi H, Somech R, Nahum A, Sharfe N. Characterization ofζ-associated protein, 70 kd (ZAP70)-deficient human lymphocytes. J Allergy ClinImmunol. 2010 Dec;126(6):1226-33.e1. doi: 10.1016/j.jaci.2010.07.029.
    6. Turul T, Tezcan I, Artac H, de Bruin-Versteeg S, Barendregt BH, Reisli I,Sanal O, van Dongen JJ, van der Burg M. Clinical heterogeneity can hamper thediagnosis of patients with ZAP70 deficiency. Eur J Pediatr. 2009Jan;168(1):87-93. doi: 10.1007/s00431-008-0718-x.
    7. Walkovich K, Vander Lugt M. ZAP70-Related Combined Immunodeficiency. 2009 Oct 20 [updated 2017 Jun 8]. In: Adam MP, Ardinger HH, Pagon RA, Wallace SE, BeanLJH, Stephens K, Amemiya A, editors. GeneReviews® [Internet]. Seattle (WA):University of Washington, Seattle; 1993-2020. Available fromhttp://www.ncbi.nlm.nih.gov/books/NBK20221/
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