References: |
LYN-1604 is a ULK1 agonist. Three amino acid residues (LYS50, LEU53, and TYR89) are key to the activation site of LYN-1604 and ULK1 by site-directed mutagenesis and biochemical assays. LYN-1604 induces cell death involved in ATF3, RAD21, and caspase3, accompanied by autophagy and apoptosis. LYN-1604 is bound to wild-type ULK1 with a binding affinity in the nanomole range (KD = 291.4 nM), but the ULK1Y89A mutant protein causes a sharp decrease in binding affinity with lower response and Kd than wild-type ULK1, ULK1K50A and ULK1L53A mutants[1].LYN-1604 could significantly inhibit the growth of xenograft MDA-MB-231 cells. LYN-1604 can directly activate ULK1, the initiator of autophagy, thereby inducing cell death to inhibit the growth of TNBC in vitro and in vivo[1]. |