M-525 binds to menin (IC50: 3 nM) and achieves low nanomolar potencies in cell growth inhibition and in the suppression of MLL regulated gene expression in MLL leukemia cells. M-525 is a first-in-class, highly potent, irreversible, and covalent menin-MLL
Tetrahydropteroylpentaglutamate shows potent product inhibition by H4PteGlu5. In vivo, this enzyme may bind great amounts of this coenzyme in a nearly irreversible enzyme.
JH295 is a highly potent and selective inhibitor of NIMA-related kinase 2 (Nek2), exhibiting irreversibleinhibition activity with an IC 50 value of 770 nM. This compound effectively inhibits cellular Nek2 using the alkylation of Cys22. Importantly, JH295 does not exhibit any inhibitory effects toward Cdk1, Aurora B, or Plk1, which are kinases involved in mitotic processes. Furthermore, JH295 has no impact on bipolar spindle assembly or the spindle assembly checkpoint mechanism.
S-Adenosylhomocysteine (SAH) hydrolase is responsible for the reversible hydrolysis of SAH into adenosine and homocysteine. Inhibition of this enzyme leads to the accumulation of SAH within cells, thereby increasing the SAH to S-adenosylmethionine (SAM) ratio and subsequently inhibiting SAM-dependent methyltransferases. (−)-Neplanocin A, a potent and irreversible inhibitor of SAH hydrolase (Ki= 8.39 nM), exhibits significant antitumor activity against mouse leukemia L1210 cells and holds broad-spectrum antiviral properties. Its efficacy notably surpasses that of the reversible inhibitor 3-deazaneplanocin, especially in combating vesicular stomatitis, evidencing a higher potency with ID50 values of 0.07 μg/ml for Neplanocin A versus 0.3 μg/ml for 3-deazaneplanocin.
SOCLAC, a derivative of the acid ceramidase inhibitor SABRAC, functions as an irreversible inhibitor of acid ceramidase with an inhibition constant (Ki) of 40.2 nM.
Neurotoxin that blocks neuromuscular transmission via irreversibleinhibition of nicotinic ACh receptors (nAChRs). Prevents opening of nicotinic receptor-associated ion channels and is selective for α7 receptors over α3β4 receptors (IC50 values are 1.6 nM
Potent irreversible αVβ3 integrin antagonist (Ki = 0.27 nM). Disrupts attachment of osteoclasts to bone and inhibits bone reabsorption (IC50 = 0.1 nM). Prevents ADP-induced platelet aggregation via inhibition of glycoprotein IIb IIIa (GpIIb IIIa, αIIbβ3)