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BMSpep-57, a potent macrocyclic peptide inhibitor, competitively disrupts the PD-1/PD-L1 interaction, demonstrating a significant inhibitory concentration (IC50) of 7.68 nM. It exhibits binding affinity towards PD-L1 with dissociation constants (Kd) of 19 nM and 19.88 nM in MicroScale Thermophoresis (MST) and Surface Plasmon Resonance (SPR) assays, respectively. This compound enhances T cell functionality by promoting Interleukin-2 (IL-2) production within Peripheral Blood Mononuclear Cells (PBMCs).

| Pack Size | Price | USA Warehouse | Global Warehouse | Quantity |
|---|---|---|---|---|
| 25 mg | $1,520 | Inquiry | Inquiry |
| Description | BMSpep-57, a potent macrocyclic peptide inhibitor, competitively disrupts the PD-1/PD-L1 interaction, demonstrating a significant inhibitory concentration (IC50) of 7.68 nM. It exhibits binding affinity towards PD-L1 with dissociation constants (Kd) of 19 nM and 19.88 nM in MicroScale Thermophoresis (MST) and Surface Plasmon Resonance (SPR) assays, respectively. This compound enhances T cell functionality by promoting Interleukin-2 (IL-2) production within Peripheral Blood Mononuclear Cells (PBMCs). |
| Targets&IC50 | PD-1/PD-L1:7.68 nM (IC50) |
| In vitro | In an ELISA competition assay, BMSpep-57 inhibits PD-1/PD-L1 binding by up to 98.1% at 300 nM, with a concentration-dependent inhibition and an IC50 of 7.68 nM [1]. BMSpep-57 induces high levels of IL-2 at 1 μM and 500 nM in SEB-stimulated peripheral blood mononuclear cells [1]. BMSpep-57 (0.2-10 μM; 24 hours) does not affect the viability of Jurkat, CHO, and HepG2 cells at the tested concentrations [1]. |
| Molecular Weight | 1868.2 |
| Formula | C89H126N24O19S |
| Cas No. | 1629655-80-6 |
| Smiles | [H][C@@]12CCCN1C(=O)[C@H](CC(N)=O)NC(=O)[C@H](C)N(C)C(=O)[C@H](Cc1ccccc1)NC(=O)CSC[C@H](NC(=O)[C@H](CCCNC(N)=N)NC(=O)[C@H](CCCC)N(C)C(=O)[C@H](CCCC)N(C)C(=O)[C@H](Cc1c[nH]c3ccccc13)NC(=O)[C@H](CO)NC(=O)[C@H](Cc1c[nH]c3ccccc13)NC(=O)[C@H](CO)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](Cc1cnc[nH]1)NC2=O)C(=O)NCC(N)=O |
| Sequence | {mercaptoacetic acid}-Phe-Ala-Asn-Pro-His-Leu-Ser-Trp-Ser-Trp-{norleucine}-{norleucine}-Arg-Cys-Gly (Sulfide bridge:mercaptoacetic acid 1-Cys15) |
| Sequence Short | {mercaptoacetic acid}-FANPHLSWSW-{norleucine}-{norleucine}-RCG (Sulfide bridge:mercaptoacetic acid 1-Cys15) |
| Storage | keep away from moisture | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice/Shipping at ambient temperature. |
Dissolve 2 mg of the compound in 100 μL DMSO
to obtain a stock solution at a concentration of 20 mg/mL . If the required concentration exceeds the compound's known solubility, please contact us for technical support before proceeding.
1) Add 100 μL of the DMSO
stock solution to 400 μL PEG300
and mix thoroughly until the solution becomes clear.
2) Add 50 μL Tween 80 and mix well until fully clarified.
3) Add 450 μL Saline,PBS or ddH2O
and mix thoroughly until a homogeneous solution is obtained.
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