5UYU

Crystal structure of BACE1 in complex with 2-aminooxazoline-3-azaxanthene compound 12

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.206 

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This is version 1.2 of the entry. See complete history. 


Literature

Development of 2-aminooxazoline 3-azaxanthene beta-amyloid cleaving enzyme (BACE) inhibitors with improved selectivity against Cathepsin D.

Low, J.D., Bartberger, M.D., Chen, K., Cheng, Y., Fielden, M.R., Gore, V., Hickman, D., Liu, Q., Allen Sickmier, E., Vargas, H.M., Werner, J., White, R.D., Whittington, D.A., Wood, S., Minatti, A.E.

(2017) Medchemcomm 8: 1196-1206

  • DOI: 10.1039/c7md00106a
  • Primary Citation of Related Structures:  
    5UX4, 5UYU

  • PubMed Abstract: 

    • As part of an ongoing effort at Amgen to develop a disease-modifying therapy for Alzheimer's disease, we have previously used the aminooxazoline xanthene (AOX) scaffold to generate potent and orally efficacious BACE1 inhibitors. While AOX-BACE1 inhibitors demonstrated acceptable cardiovascular safety margins, a retinal pathological finding in rat toxicological studies demanded further investigation ...

    As part of an ongoing effort at Amgen to develop a disease-modifying therapy for Alzheimer's disease, we have previously used the aminooxazoline xanthene (AOX) scaffold to generate potent and orally efficacious BACE1 inhibitors. While AOX-BACE1 inhibitors demonstrated acceptable cardiovascular safety margins, a retinal pathological finding in rat toxicological studies demanded further investigation. It has been widely postulated that such retinal toxicity might be related to off-target inhibition of Cathepsin D (CatD), a closely related aspartyl protease. We report the development of AOX-BACE1 inhibitors with improved selectivity against CatD by following a structure- and property-based approach. Our efforts culminated in the discovery of a picolinamide-substituted 3-aza-AOX-BACE1 inhibitor absent of retinal effects in an early screening rat toxicology study.

    Organizational Affiliation: 

    Department of Medicinal Chemistry , Amgen Inc. , One Amgen Center Drive , Thousand Oaks , CA 91320 , USA . Email: aminatti@amgen.com ; Tel: +1 805 447 4721.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-secretase 1A411Homo sapiensMutation(s): 2 
Gene Names: BACE1, BACE, KIAA1149
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
GTEx:  ENSG00000186318 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP56817
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
8QV
Query on 8QV
Download Ideal Coordinates CCD File 
G [auth A](5S)-3-(3,6-dihydro-2H-pyran-4-yl)-7-[5-(prop-1-yn-1-yl)pyridin-3-yl]-5'H-spiro[1-benzopyrano[2,3-c]pyridine-5,4'-[1,3]oxazol]-2'-amine
C27 H22 N4 O3
PAMPHNBKOPBUKU-MHZLTWQESA-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 
H [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.205 
  • R-Value Observed: 0.206 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.287α = 90
b = 102.287β = 90
c = 170.374γ = 120
Software Package:
Software NamePurpose
HKL-2000data scaling
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
AMoREphasing
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-05-17
    Type: Initial release
  • Version 1.1: 2017-11-22
    Changes: Refinement description
  • Version 1.2: 2018-08-29
    Changes: Data collection, Database references, Derived calculations