p-site

INCA-6 (Triptycene-1,4-quinone) is a cell-permeable NFAT inhibitor that disrupts CN-NFAT signaling by targeting the NFAT(P) substrate at the calcineurin (CN) phosphatase site.

ML318 is a biaryl nitrile PvdQ acylase inhibitor (IC50 of 20 nM for binding in the acyl-binding site). ML318 inhibits P. aeruginosa (PAO1) with IC50 of 19 μM. ML318 prevents pyoverdine production and limits the growth of P. aeruginosa under iron-limiting

2',5'-Dideoxyadenosine is a potent and non-competitive adenylyl cyclase inhibitor, binding to the P-site with an IC50 of 3 μM.

BACE1-IN-5 (Compound 15), a potent β-site amyloid precursor protein cleaving enzyme 1 (BACE1) inhibitor, demonstrates significant efficacy with an IC50 of 9.1 nM for BACE1 inhibition and an impressive IC50 of 0.82 nM against cellular amyloid-β (Aβ) production. Additionally, it is engineered to enhance hERG inhibition and P-gp efflux, indicating its optimized medicinal chemistry profile [1].

MMV390048 is an antimalarial agent and is a representative of a new chemical class of Plasmodium PI4K inhibitor (Kdapp=0.3 μM). MMV390048 binds to the ATP binding site of Plasmodium PI4K and does not bind to other P. falciparum and human kinases apart from human PIP4K2C, thus alleviating potential kinase-mediated safety concerns.

GSK-3β inhibitor24 (Compound 41) is a potent GSK-3β inhibitor with an IC50 of 0.22 nM. It increases GSK-3β phosphorylation at the Ser9 site in a dose-dependent manner and inhibits tau protein hyperphosphorylation by reducing the abundance of p-tau-Ser396. The compound upregulates β-catenin and neurogenesis-related markers (GAP43 and MAP-2), demonstrating significant anti-Alzheimer's disease (AD) activity.

Eritadenine (Lentinacin) is a mushroom-derived compound that acts on the adenosine P-site in adipocyte plasma membranes, lowering cholesterol levels and altering phospholipid composition in rat models of hyperhomocysteinemia, used in anxiety disorder studies.

CAY10761 is an inhibitor of ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1; IC50s = 467 and 429 μM for the human and snake venom enzymes, respectively).1,2 It also inhibits mushroom tyrosinase (Ki = 1.9 μM) and urease from jack bean, P. mirabilis, and B. pasteurii (IC50s = 0.093, <0.125, and 0.089 mM, respectively, at pH 8.2).3,4 |1. Khan, K.M., Fatima, N., Rasheed, M., et al. 1,3,4-Oxadiazole-2(3H)-thione and its analogues: A new class of non-competitive nucleotide pyrophosphatases/phosphodiesterases 1 inhibitors. Bioorg. Med. Chem. 17(22), 7816-7822 (2009).|2. Onyedibe, K.I., Wang, M., and Sintim, H.O. ENPP1, an old enzyme with new functions, and small molecule inhibitors - A STING in the tale of ENPP1. Molecules 24(22), E4192 (2019).|3. Ghani, U., and Ullah, N. New potent inhibitors of tyrosinase: Novel clues to binding of 1,3,4-thiadiazole-2(3H)-thiones, 1,3,4-oxadiazole-2(3H)-thiones, 4-amino-1,2,4-triazole-5(4H)-thiones, and substituted hydrazides to the dicopper active site. Bioorg. Med. Chem. 18(11), 4042-4048 (2010).|4. Amtul, Z., Rasheed, M., Choudhary, M.I., et al. Kinetics of novel competitive inhibitors of urease enzymes by a focused library of oxadiazoles/thiadiazoles and triazoles. Biochem. Biophys. Res. Commun. 319(3), 1053-1063 (2004).

INDOPY-1 is a Nucleotide-Competing Reverse Transcriptase Inhibitor. INDOPY-1 was the first NcRTI discovered, displaying reversible competitive inhibition of dNTP binding. 3,4 Biochemical studies showed that INDOPY-1 arrests RT DNA in a post-translocated (P site) complex.

OP-145, a derivative of the antimicrobial peptide LL-37, is a synthetic antimicrobial peptide showing activity against E. coli, P. aeruginosa, C. albicans, and A. niger, with minimum inhibitory concentrations (MICs) of 2, 3, 6, and 18 µM, respectively. Utilizing poly(lactic-co-glycolic acid) (PLGA) microspheres loaded with OP-145 effectively prevents biofilm formation in a mouse model of bone infection, which is initiated by surgical femoral fracture and subsequent bacterial inoculation at the fracture site.

Septide is an NK1 receptor agonist acting at a site distinct from substance P.

CPI1 is an effective and highly specific inhibitor of multidrug resistance protein 1 (MRP1). It exhibits inhibitory activity against MRP1 at the nanomolar level (Ki: 100 nM) and has minimal effect on P-glycoprotein (Pgp). CPI1 competes with LTC4 for binding to the same site on MRP1, inhibiting ATP hydrolysis and substrate transport. It is useful in research related to drug delivery and addressing cancer chemotherapy resistance.