1. Signaling Pathways
  2. Immunology/Inflammation
  3. DOCK


Dedicator of cytokinesis

Dedicator of cytokinesis (DOCK) proteins constitute a family of evolutionarily conserved guanine nucleotide exchange factors (GEFs) for the Rho family of GTPases. Although DOCK family proteins do not contain the Dbl homology domain typically found in other GEFs, they mediate the GTP-GDP exchange reaction through the DOCK homology region-2 (DHR-2) domain. In mammals, this family consists of 11 members, each of which has unique functions depending on the expression pattern and the substrate specificity. For example, DOCK2 is a Rac activator critical for migration and activation of leukocytes, whereas DOCK8 is a Cdc42-specific GEF that regulates interstitial migration of dendritic cells. Identification of DOCK2 and DOCK8 as causative genes for severe combined immunodeficiency syndromes in humans has highlighted their roles in immune surveillance. In addition, the recent discovery of a naturally occurring DOCK2-inhibitory metabolite has uncovered an unexpected mechanism of tissue-specific immune evasion. On the other hand, GEF-independent functions have been shown for DOCK8 in antigen-induced IL-31 production in helper T cells.

DOCK Related Products (3):

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-124711
    Inhibitor 99.96%
    TBOPP is a selective inhibitor of DOCK1 with an IC50 of 8.4 μM. TBOPP binds to the DOCK1 DHR-2 domain with high affinity (Kd of 7.1 μM), has anti-tumor activity for broader types of tumors.
  • HY-110100
    Inhibitor 99.94%
    CPYPP is a DOCK2-Rac1 interaction inhibitor. CPYPP binds to DOCK2 DHR-2 domain and inhibits the guanine nucleotide exchange factor (GEF) activity of DOCK2DHR-2 for Rac1 in a dose-dependent manner with an IC50 of 22.8 µM. CPYPP also inhibits DOCK180 and DOCK5 and less inhibits DOCK9.
  • HY-153128
    DOCK2-IN-1 (compound 3), a CPYPP (HY-110100) analogue, is an inhibitor of DOCK2 as well (IC50=19.1 μM). DOCK2-IN-1 binds to DOCK2 DHR-2 domain in a reversible manner to inhibits its catalytic activity. DOCK2-IN-1 blocks the activation of both chemokine receptor- and antigen receptor-mediated Rac in lymphocytes. DOCK2-IN-1 significantly suppresses chemotactic response and T cell activation.