Discovery of Selective Inhibitors of Endoplasmic Reticulum Aminopeptidase 1.

Abstract:

:ERAP1 is an endoplasmic reticulum-resident zinc aminopeptidase that plays an important role in the immune system by trimming peptides for loading onto major histocompatibility complex proteins. Here, we report discovery of the first inhibitors selective for ERAP1 over its paralogues ERAP2 and IRAP. Compound 1 (N-(N-(2-(1H-indol-3-yl)ethyl)carbamimidoyl)-2,5-difluorobenzenesulfonamide) and compound 2 (1-(1-(4-acetylpiperazine-1-carbonyl)cyclohexyl)-3-(p-tolyl)urea) are competitive inhibitors of ERAP1 aminopeptidase activity. Compound 3 (4-methoxy-3-(N-(2-(piperidin-1-yl)-5-(trifluoromethyl)phenyl)sulfamoyl)benzoic acid) allosterically activates ERAP1's hydrolysis of fluorogenic and chromogenic amino acid substrates but competitively inhibits its activity toward a nonamer peptide representative of physiological substrates. Compounds 2 and 3 inhibit antigen presentation in a cellular assay. Compound 3 displays higher potency for an ERAP1 variant associated with increased risk of autoimmune disease. These inhibitors provide mechanistic insights into the determinants of specificity for ERAP1, ERAP2, and IRAP and offer a new therapeutic approach of specifically inhibiting ERAP1 activity in vivo.

journal_name

J Med Chem

authors

Maben Z,Arya R,Rane D,An WF,Metkar S,Hickey M,Bender S,Ali A,Nguyen TT,Evnouchidou I,Schilling R,Stratikos E,Golden J,Stern LJ

doi

10.1021/acs.jmedchem.9b00293

subject

Has Abstract

pub_date

2020-01-09 00:00:00

pages

103-121

issue

1

eissn

0022-2623

issn

1520-4804

journal_volume

63

pub_type

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