CD3 ist ein Gen, das durch das Symbol CD3D kodiert wird. Andere Namen sind: T-cell surface glycoprotein CD3 delta chain; T-cell receptor T3 delta chainD; T3D. CD3 hat eine Masse von 18.93kDa, eine Aminosäurelänge von 171, und ist an Immunodeficiency 19 beteiligt.
Wir bieten 66 antikörper gegen CD3, aufgewachsen in Kaninchen, Maus und Ratte, welche geeignet sind für WB, IHC, ICC/IF, FC and IP mit Proben abgeleitet von Human, Maus, Ratte, Affe, Huhn, Hund und Primaten.
Gen- und Proteininformationen
UniProt Zusammenfassung
Part of the TCR-CD3 complex present on T-lymphocyte cell surface that plays an essential role in adaptive immune response. When antigen presenting cells (APCs) activate T-cell receptor (TCR), TCR-mediated signals are transmitted across the cell membrane by the CD3 chains CD3D, CD3E, CD3G and CD3Z. All CD3 chains contain immunoreceptor tyrosine-based activation motifs (ITAMs) in their cytoplasmic domain. Upon TCR engagement, these motifs become phosphorylated by Src family protein tyrosine kinases LCK and FYN, resulting in the activation of downstream signaling pathways (PubMed:2470098). In addition of this role of signal transduction in T-cell activation, CD3D plays an essential role in thymocyte differentiation. Indeed, participates in correct intracellular TCR-CD3 complex assembly and surface expression. In absence of a functional TCR-CD3 complex, thymocytes are unable to differentiate properly. Interacts with CD4 and CD8 and thus serves to establish a functional link between the TCR and coreceptors CD4 and CD8, which is needed for activation and positive selection of CD4 or CD8 T-cells(PubMed:12215456).
Entrez Zusammenfassung
The protein encoded by this gene is part of the T-cell receptor/CD3 complex (TCR/CD3 complex) and is involved in T-cell development and signal transduction. The encoded membrane protein represents the delta subunit of the CD3 complex, and along with four other CD3 subunits, binds either TCR alpha/beta or TCR gamma/delta to form the TCR/CD3 complex on the surface of T-cells. Defects in this gene are a cause of severe combined immunodeficiency autosomal recessive T-cell-negative/B-cell-positive/NK-cell-positive (SCIDBNK). Two transcript variants encoding different isoforms have been found for this gene. Other variants may also exist, but the full-length natures of their transcripts has yet to be defined.
Gewebespezifität
CD3D is mostly present on T-lymphocytes with its TCR-CD3 partners. Present also in fetal NK-cells.
Rolle bei Krankheiten
Immunodeficiency 19: An autosomal recessive form of severe combined immunodeficiency characterized by onset in early infancy of recurrent bacterial, viral, and fungal infections. Patients usually have chronic diarrhea, recurrent respiratory infections, and failure to thrive. Immunologic work-up shows a T-cell negative, B-cell positive, NK-cell positive phenotype.
Posttranslationale Modifikation
Phosphorylated on Tyr residues after T-cell receptor triggering by LCK in association with CD4/CD8.
