View source for 7pfs


==Crystal structure of ERAP2 aminopeptidase in complex with phosphinic pseudotripeptide ((1R)-1-Amino-3-phenylpropyl){2-([1,1:3,1-terphenyl]-5-ylmethyl)-3-[((2S)-1-amino-1-oxo-3-phenylpropan-2-yl)-amino]-3-oxopropyl}phosphinic acid==
<StructureSection load='7pfs' size='340' side='right'caption='[[7pfs]], [[Resolution|resolution]] 2.70&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[7pfs]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7PFS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7PFS FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.7&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=7OO:[(2~{S})-3-[[(2~{S})-1-azanyl-4-methyl-1-oxidanylidene-pentan-2-yl]amino]-2-[(3,5-diphenylphenyl)methyl]-3-oxidanylidene-propyl]-[(1~{R})-1-azanyl-3-phenyl-propyl]phosphinic+acid'>7OO</scene>, <scene name='pdbligand=BMA:BETA-D-MANNOSE'>BMA</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=IMD:IMIDAZOLE'>IMD</scene>, <scene name='pdbligand=MAN:ALPHA-D-MANNOSE'>MAN</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7pfs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7pfs OCA], [https://pdbe.org/7pfs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7pfs RCSB], [https://www.ebi.ac.uk/pdbsum/7pfs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7pfs ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/ERAP2_HUMAN 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.<ref>PMID:12799365</ref> <ref>PMID:15908954</ref> <ref>PMID:16286653</ref> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Endoplasmic reticulum aminopeptidase 2 (ERAP2) is an intracellular enzyme involved in the processing of antigenic peptides intended for presentation by major histocompatibility complex class I (MHCI) molecules. Because of its role in regulating immune responses, ERAP2 is an emerging pharmacological target. Phosphinic pseudopeptides are potent transition-state analogue inhibitors of ERAP2. Previous structure-activity studies have revealed a complex but ambiguous relationship between the occupation of putative specificity pockets and the inhibitor efficacy. To address these problems, we solved crystal structures of ERAP2 in complex with two phosphinic pseudotripeptide inhibitors. Both compounds are found in the catalytic site in a canonical orientation for transition-state analogues and utilize the S1 and S2' pockets in a similar fashion. Strikingly, their P1' side chains exhibit different orientations and make interactions with distinct shallow pockets near the ERAP2 active site. These structures suggest that S1' pocket usage in ERAP2 may be inhibitor-dependent and constitute useful starting templates for the further optimization of this class of compounds.

Inhibitor-Dependent Usage of the S1' Specificity Pocket of ER Aminopeptidase 2.,Mpakali A, Georgiadis D, Stratikos E, Giastas P ACS Med Chem Lett. 2022 Jan 13;13(2):218-224. doi:, 10.1021/acsmedchemlett.1c00582. eCollection 2022 Feb 10. PMID:35178178<ref>PMID:35178178</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 7pfs" style="background-color:#fffaf0;"></div>

==See Also==
*[[Aminopeptidase 3D structures|Aminopeptidase 3D structures]]
== References ==
<references/>
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</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Giastas P]]
[[Category: Mpakali A]]
[[Category: Stratikos E]]