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: 2.3 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


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

  • 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 ...

    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.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-secretase 1
A
416Homo sapiensMutation(s): 0 
Gene Names: BACE1 (BACE, KIAA1149)
EC: 3.4.23.46
Find proteins for P56817 (Homo sapiens)
Go to Gene View: BACE1
Go to UniProtKB:  P56817
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
IOD
Query on IOD

Download SDF File 
Download CCD File 
A
IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
 Ligand Interaction
0B6
Query on 0B6

Download SDF File 
Download CCD File 
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
GOL
Query on GOL

Download SDF File 
Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.191 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 102.149α = 90.00
b = 102.149β = 90.00
c = 171.125γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data processing
MOLREPphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

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