Nx-1607 (Nx1607) is a small-molecule inhibitor of the RING-type E3 ubiquitin ligase Cbl-b with IC50 of 0.46 nM.
Nx-1607 binds to the TKBD-LHR unit of Cbl-b, locking the protein in an inactive conformation.
Nx-1607 inhibits the interaction between the N-terminal E3 ligase fragment (TKBD-LHR-RING) of Cbl-b and UbcH5B-Ub (E2-Ub) complex in the presence of the Src kinase substrate.
