View source for 3i25


==Potent Beta-Secretase 1 hydroxyethylene Inhibitor==
<StructureSection load='3i25' size='340' side='right'caption='[[3i25]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[3i25]] is a 3 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=3I25 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3I25 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]] 2.1&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=MV7:N-[(2S,3S,5R)-6-{[(2S)-1-(benzylamino)-3-methyl-1-oxobutan-2-yl]amino}-1-(3,5-difluorophenoxy)-3-hydroxy-5-(2-methoxyethoxy)-6-oxohexan-2-yl]-5-[methyl(methylsulfonyl)amino]-N-[(1R)-1-phenylethyl]benzene-1,3-dicarboxamide+(non-preferred+name)'>MV7</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=3i25 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3i25 OCA], [https://pdbe.org/3i25 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3i25 RCSB], [https://www.ebi.ac.uk/pdbsum/3i25 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3i25 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/BACE1_HUMAN BACE1_HUMAN] Responsible for the proteolytic processing of the amyloid precursor protein (APP). Cleaves at the N-terminus of the A-beta peptide sequence, between residues 671 and 672 of APP, leads to the generation and extracellular release of beta-cleaved soluble APP, and a corresponding cell-associated C-terminal fragment which is later released by gamma-secretase.<ref>PMID:10677483</ref> <ref>PMID:20354142</ref> 
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/i2/3i25_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview03.spt</scriptWhenUnchecked>
    <text>to colour the structure by Evolutionary Conservation</text>
  </jmolCheckbox>
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=3i25 ConSurf].
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== Publication Abstract from PubMed ==
In a preceding study we have described the development of a new hydroxyethylene (HE) core motif displaying P1 aryloxymethyl and P1' methoxy substituents delivering potent BACE-1 inhibitors. In a continuation of this work we have now explored the SAR of the S1' pocket by introducing a set of P1' alkoxy groups and evaluated them as BACE-1 inhibitors. Previously the P1 and P1' positions of the classical HE template have been relatively little explored due to the complexity of the chemical routes involved in modifications at these positions. However, the chemistries developed for the current HE template renders substituents in both the P1 and P1' positions readily available for SAR exploration. The BACE-1 inhibitors prepared displayed K(i) values in the range of 1-20 nM, where the most potent compounds featured small P1' groups. The cathepsin D selectivity which was high for the smallest P1' substituents (P1'=ethoxy, fold selectively &gt;1500) dropped for larger groups (P1'=benzyloxy, fold selectivity of 3). We have also confirmed the importance of both the hydroxyl group and its stereochemistry preference for this HE transition state isostere by preparing both the deoxygenated analogue and by inverting the configuration of the hydroxyl group to the R-configuration, which as expected resulted in large activity drops. Finally substituting the hydroxyl group by an amino group having the same configuration (S), which previously have been described to deliver potent BACE-1 inhibitors with advantageous properties, surprisingly resulted in a large drop in the inhibitory activity.

Discovery of potent BACE-1 inhibitors containing a new hydroxyethylene (HE) scaffold: exploration of P1' alkoxy residues and an aminoethylene (AE) central core.,Bjorklund C, Adolfsson H, Jansson K, Lindberg J, Vrang L, Hallberg A, Rosenquist S, Samuelsson B Bioorg Med Chem. 2010 Feb 15;18(4):1711-23. Epub 2010 Jan 11. PMID:20122837<ref>PMID:20122837</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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<div class="pdbe-citations 3i25" style="background-color:#fffaf0;"></div>

==See Also==
*[[Beta secretase 3D structures|Beta secretase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Homo sapiens]]
[[Category: Large Structures]]
[[Category: Borkakoti N]]
[[Category: Lindberg JD]]
[[Category: Nystrom S]]