5YGY

Crystal Structure of BACE1 in complex with (S)-N-(3-(2-amino-6-(fluoromethyl)-4 -methyl-4H-1,3-oxazin-4-yl)-4-fluorophenyl)-5-cyanopicolinamide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.196 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Rational Design of Novel 1,3-Oxazine Based beta-Secretase (BACE1) Inhibitors: Incorporation of a Double Bond To Reduce P-gp Efflux Leading to Robust A beta Reduction in the Brain

Fuchino, K.Mitsuoka, Y.Masui, M.Kurose, N.Yoshida, S.Komano, K.Yamamoto, T.Ogawa, M.Unemura, C.Hosono, M.Ito, H.Sakaguchi, G.Ando, S.Ohnishi, S.Kido, Y.Fukushima, T.Miyajima, H.Hiroyama, S.Koyabu, K.Dhuyvetter, D.Borghys, H.Gijsen, H.J.M.Yamano, Y.Iso, Y.Kusakabe, K.I.

(2018) J Med Chem 61: 5122-5137

  • DOI: 10.1021/acs.jmedchem.8b00002
  • Primary Citation of Related Structures:  
    5YGY

  • PubMed Abstract: 
  • Accumulation of Aβ peptides is a hallmark of Alzheimer's disease (AD) and is considered a causal factor in the pathogenesis of AD. β-Secretase (BACE1) is a key enzyme responsible for producing Aβ peptides, and thus agents that inhibit BACE1 should be beneficial for disease-modifying treatment of AD ...

    Accumulation of Aβ peptides is a hallmark of Alzheimer's disease (AD) and is considered a causal factor in the pathogenesis of AD. β-Secretase (BACE1) is a key enzyme responsible for producing Aβ peptides, and thus agents that inhibit BACE1 should be beneficial for disease-modifying treatment of AD. Here we describe the discovery and optimization of novel oxazine-based BACE1 inhibitors by lowering amidine basicity with the incorporation of a double bond to improve brain penetration. Starting from a 1,3-dihydrooxazine lead 6 identified by a hit-to-lead SAR following HTS, we adopted a p K a lowering strategy to reduce the P-gp efflux and the high hERG potential leading to the discovery of 15 that produced significant Aβ reduction with long duration in pharmacodynamic models and exhibited wide safety margins in cardiovascular safety models. This compound improved the brain-to-plasma ratio relative to 6 by reducing P-gp recognition, which was demonstrated by a P-gp knockout mouse model.


    Organizational Affiliation

    1] Commissariat à l'Energie Atomique et aux Energies Alternatives, Direction des Sciences du Vivant, Institut de Biologie Environnementale et de Biotechnologies,, F-13108, France [2] Centre National de la Recherche Scientifique, Unité Mixte de Recherche Biologie Végétale et Microbiologie Environnementales, Saint-Paul-lez-Durance, F-13108, France [3] Aix-Marseille Université, Saint-Paul-lez-Durance, F-13108, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-secretase 1A416Homo sapiensMutation(s): 0 
Gene Names: BACE1BACEKIAA1149
EC: 3.4.23.46
UniProt & NIH Common Fund Data Resources
Find proteins for P56817 (Homo sapiens)
Explore P56817 
Go to UniProtKB:  P56817
PHAROS:  P56817
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
0B6 (Subject of Investigation/LOI)
Query on 0B6

Download Ideal Coordinates CCD File 
J [auth A]~{N}-[3-[(4~{S})-2-azanyl-6-(fluoranylmethyl)-4-methyl-1,3-oxazin-4-yl]-4-fluoranyl-phenyl]-5-cyano-pyridine-2-carboxamide
C19 H15 F2 N5 O2
ORHZQSYKGHHDOP-IBGZPJMESA-N
 Ligand Interaction
IOD
Query on IOD

Download Ideal Coordinates CCD File 
B [auth A], C [auth A], D [auth A], E [auth A], F [auth A]IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

Download Ideal Coordinates CCD File 
G [auth A], H [auth A], I [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
0B6 BindingDB:  5YGY IC50: min: 3.6, max: 59 (nM) from 2 assay(s)
Binding MOAD:  5YGY IC50: 59 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.196 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.149α = 90
b = 102.149β = 90
c = 171.125γ = 120
Software Package:
Software NamePurpose
HKL-2000data processing
HKL-2000data scaling
MOLREPphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment  



Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-23
    Type: Initial release
  • Version 1.1: 2018-05-30
    Changes: Data collection, Database references
  • Version 1.2: 2018-07-11
    Changes: Data collection, Database references