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The protein encoded by this gene is an interleukin 3 specific subunit of a heterodimeric cytokine receptor. The receptor is composed of a ligand specific alpha subunit and a signal transducing beta subunit shared by the receptors for interleukin 3 (IL3), colony stimulating factor 2 (CSF2/GM-CSF), and interleukin 5 (IL5).
Quaternary structure of the CD123 protein. The interleukin-3 receptor is a molecule found on cells which helps transmit the signal of interleukin-3, a soluble cytokine important in the immune system. The gene coding for the receptor is located in the pseudoautosomal region of the X and Y chromosomes.
Cancers that possess the B7-H3 immunoregulatory checkpoint receptor on the tumor cell have been one such target in clinical trials. This B7-H3 protein is expressed on cancer cell for several types of cancer. Often, the drug will contain two domains, one binding the T-cell's CD3 and the other targeting and binding cancer cells.
Receptor tyrosine-protein kinase erbB-2, HER2 (human epidermal growth factor receptor 2) or HER2/neu. Overexpression plays a role in certain types of breast cancer. It is a biomarker target for breast cancer drugs such as Herceptin. CD344: FZD4 (Frizzled-4) a receptor in WNT-signalling pathway and for Norrin.
T-cell surface glycoprotein CD3 zeta chain also known as T-cell receptor T3 zeta chain or CD247 (Cluster of Differentiation 247) is a protein that in humans is encoded by the CD247 gene. [5] Some older literature mention a similar protein called "CD3 eta" in mice. It is now understood to be an isoform differing in the last exon. [6]
G 12 /G 13 alpha subunits are alpha subunits of heterotrimeric G proteins that link cell surface G protein-coupled receptors primarily to guanine nucleotide exchange factors for the Rho small GTPases to regulate the actin cytoskeleton. [1] Together, these two proteins comprise one of the four classes of G protein alpha subunits. [2]
CD47 (Cluster of Differentiation 47) also known as integrin associated protein (IAP) is a transmembrane protein that in humans is encoded by the CD47 gene.CD47 belongs to the immunoglobulin superfamily [5] and partners with membrane integrins and also binds the ligands thrombospondin 1 (TSP-1) and signal-regulatory protein alpha (SIRPα). [6]
CD23, also known as Fc epsilon RII, or FcεRII, is the "low-affinity" receptor for IgE, an antibody isotype involved in allergy and resistance to parasites, and is important in regulation of IgE levels. Unlike many of the antibody receptors, CD23 is a C-type lectin.