View source for 5ygx


==Structure of BACE1 in complex with N-(3-((4R,5R,6S)-2-amino-6-(1,1-difluoroethyl)-5-fluoro-4-methyl-5,6-dihydro-4H-1,3-oxazin-4-yl)-4-fluorophenyl)-5-(fluoromethoxy)pyrazine-2-carboxamide==
<StructureSection load='5ygx' size='340' side='right'caption='[[5ygx]], [[Resolution|resolution]] 2.20&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[5ygx]] is a 1 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=5YGX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=5YGX 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]] 2.2&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=0B5:~{N}-[3-[(4~{R},5~{R},6~{S})-2-azanyl-6-[1,1-bis(fluoranyl)ethyl]-5-fluoranyl-4-methyl-5,6-dihydro-1,3-oxazin-4-yl]-4-fluoranyl-phenyl]-5-(fluoranylmethoxy)pyrazine-2-carboxamide'>0B5</scene>, <scene name='pdbligand=DMS:DIMETHYL+SULFOXIDE'>DMS</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=IOD:IODIDE+ION'>IOD</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=5ygx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=5ygx OCA], [https://pdbe.org/5ygx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=5ygx RCSB], [https://www.ebi.ac.uk/pdbsum/5ygx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=5ygx 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> 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
beta-Secretase (BACE1) has an essential role in the production of amyloid beta peptides that accumulate in patients with Alzheimer's disease (AD). Thus, inhibition of BACE1 is considered to be a disease-modifying approach for the treatment of AD. Our hit-to-lead efforts led to a cellular potent 1,3-dihydro-oxazine 6, which however inhibited hERG and showed high P-gp efflux. The close analogue of 5-fluoro-oxazine 8 reduced P-gp efflux; further introduction of electron withdrawing groups at the 6-position improved potency and also mitigated P-gp efflux and hERG inhibition. Changing to a pyrazine followed by optimization of substituents on both the oxazine and the pyrazine culminated in 24 with robust Abeta reduction in vivo at low doses as well as reduced CYP2D6 inhibition. On the basis of the X-ray analysis and the QM calculation of given dihydro-oxazines, we reasoned that the substituents at the 6-position as well as the 5-fluorine on the oxazine would stabilize a bioactive conformation to increase potency.

Discovery of Potent and Centrally Active 6-Substituted 5-Fluoro-1,3-dihydro-oxazine beta-Secretase (BACE1) Inhibitors via Active Conformation Stabilization.,Nakahara K, Fuchino K, Komano K, Asada N, Tadano G, Hasegawa T, Yamamoto T, Sako Y, Ogawa M, Unemura C, Hosono M, Ito H, Sakaguchi G, Ando S, Ohnishi S, Kido Y, Fukushima T, Dhuyvetter D, Borghys H, Gijsen HJM, Yamano Y, Iso Y, Kusakabe KI J Med Chem. 2018 Jul 12;61(13):5525-5546. doi: 10.1021/acs.jmedchem.8b00011. Epub, 2018 Jun 14. PMID:29775538<ref>PMID:29775538</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 5ygx" 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: Ando S]]
[[Category: Asada N]]
[[Category: Borghys H]]
[[Category: Dhuyvetter D]]
[[Category: Fuchino K]]
[[Category: Fukushima T]]
[[Category: Gijsen H]]
[[Category: Hasegawa T]]
[[Category: Hosono M]]
[[Category: Iso Y]]
[[Category: Kido Y]]
[[Category: Komano K]]
[[Category: Kusakabe K]]
[[Category: Nakahara K]]
[[Category: Ogawa M]]
[[Category: Ohnishi S]]
[[Category: Sakaguchi G]]
[[Category: Sako Y]]
[[Category: Tadano G]]
[[Category: Unemura C]]
[[Category: Yamamoto T]]
[[Category: Yamano Y]]