ONX-0914 | 2555

A potent and selective immunoproteasome inhibitor with minimal cross-reactivity for the constitutive proteasome. It selectively inhibits low–molecular mass polypeptide-7 (LMP7, encoded by Psmb8), the chymotrypsin-like subunit of the immunoproteasome (IC₅₀ < 100 nM). ONX-0914 blocks presentation of LMP7-specific, MHC-I–restricted antigens in vitro and in vivo. Selective inhibition of LMP7 by ONX-0914 blocks production of interleukin-23 (IL-23) by activated monocytes and interferon-g and IL-2 by T cells.

ONX-0914 is a potent and selective immunoproteasome inhibitor with minimal cross-reactivity for the constitutive proteasome. It selectively inhibits low–molecular mass polypeptide-7 (LMP7, encoded by Psmb8), the chymotrypsin-like subunit of the immunoproteasome (IC₅₀ < 100 nM).

2555 | ONX-0914 DataSheet

Alternate Name/Synonyms: (S)-3-(4-methoxyphenyl)-N-((S)-1-((R)-2-methyloxiran-2-yl)-1-oxo-3-phenylpropan-2-yl)-2-((S)-2-(2-morpholinoacetamido)propanamido)propanamide; PR-957

Appearance: White olid

Formulation: N/A

CAS Number: 960374-59-8

Structure Available?: Y

Peptide sequence: N/A

Salt Form: No

Molecular Formula: C₃₁H₄₀N₄O₇

Molecular Weight: 580.67

Cell-Permeable?: Yes

Purity: ≥95% by HPLC

Solubilities: DMSO (>50 mg/ml)

Handling: Protect from air and light

Country of Origin: USA

Tag Line: A potent and selective immunoproteasome inhibitor

MDL Number: N/A

PubChem CID: 59254457

SMILES: CC(C(=O)NC(CC1=CC=C(C=C1)OC)C(=O)NC(CC2=CC=CC=C2)C(=O)C3(CO3)C)NC(=O)CN4CCOCC4

InChi: InChI=1S/C31H40N4O7/c1-21(32-27(36)19-35-13-15-41-16-14-35)29(38)34-26(18-23-9-11-24(40-3)12-10-23)30(39)33-25(28(37)31(2)20-42-31)17-22-7-5-4-6-8-22/h4-12,21,25-26H,13-20H2,1-3H3,(H,32,36)(H,33,39)(H,34,38)/t21-,25-,26-,31?/m0/s1

InChi Key: WQAVPPWWLLVGFK-ZCKRSBOQSA-N