5k1v
From Proteopedia
Crystal structure of Endoplasmic Reticulum aminopeptidase 2 (ERAP2) in complex with a diaminobenzoic acid derivative ligand.
Structural highlights
Function[ERAP2_HUMAN] Aminopeptidase that plays a central role in peptide trimming, a step required for the generation of most HLA class I-binding peptides. Peptide trimming is essential to customize longer precursor peptides to fit them to the correct length required for presentation on MHC class I molecules. Preferentially hydrolyzes the basic residues Arg and Lys.[1] [2] [3] Publication Abstract from PubMedEndoplasmic reticulum aminopeptidase 2 assists with the generation of antigenic peptides for presentation onto Major Histocompatibility Class I molecules in humans. Recent evidence has suggested that the activity of ERAP2 may contribute to the generation of autoimmunity, thus making ERAP2 a possible pharmacological target for the regulation of adaptive immune responses. To better understand the structural elements of inhibitors that govern their binding affinity to the ERAP2 active site, we cocrystallized ERAP2 with a medium activity 3,4-diaminobenzoic acid inhibitor and a poorly active hydroxamic acid derivative. Comparison of these two crystal structures with a previously solved structure of ERAP2 in complex with a potent phosphinic pseudopeptide inhibitor suggests that engaging the substrate N-terminus recognition properties of the active site is crucial for inhibitor binding even in the absence of a potent zinc-binding group. Proper utilization of all five major pharmacophores is necessary, however, to optimize inhibitor potency. Crystal Structures of ERAP2 Complexed with Inhibitors Reveal Pharmacophore Requirements for Optimizing Inhibitor Potency.,Mpakali A, Giastas P, Deprez-Poulain R, Papakyriakou A, Koumantou D, Gealageas R, Tsoukalidou S, Vourloumis D, Mavridis IM, Stratikos E, Saridakis E ACS Med Chem Lett. 2017 Feb 21;8(3):333-337. doi: 10.1021/acsmedchemlett.6b00505., eCollection 2017 Mar 9. PMID:28337326[4] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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