6PZ4

co-crystal structure of BACE with inhibitor AM-6494

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.203 

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Ligand Structure Quality Assessment 


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


Literature

Discovery of AM-6494: A Potent and Orally Efficacious beta-Site Amyloid Precursor Protein Cleaving Enzyme 1 (BACE1) Inhibitor with in Vivo Selectivity over BACE2.

Pettus, L.H., Bourbeau, M.P., Bradley, J., Bartberger, M.D., Chen, K., Hickman, D., Johnson, M., Liu, Q., Manning, J.R., Nanez, A., Siegmund, A.C., Wen, P.H., Whittington, D.A., Allen, J.R., Wood, S.

(2020) J Med Chem 63: 2263-2281

  • DOI: 10.1021/acs.jmedchem.9b01034
  • Primary Citation of Related Structures:  
    6PZ4

  • PubMed Abstract: 

    • β-Site amyloid precursor protein cleaving enzyme 1 (BACE1) is an aspartyl protease that plays a key role in the production of amyloid β (Aβ) in the brain and has been extensively pursued as a target for the treatment of Alzheimer's disease (AD). BACE2, an aspartyl protease that is structurally related to BACE1, has been recently reported to be involved in melanosome maturation and pigmentation ...

    β-Site amyloid precursor protein cleaving enzyme 1 (BACE1) is an aspartyl protease that plays a key role in the production of amyloid β (Aβ) in the brain and has been extensively pursued as a target for the treatment of Alzheimer's disease (AD). BACE2, an aspartyl protease that is structurally related to BACE1, has been recently reported to be involved in melanosome maturation and pigmentation. Herein, we describe the development of a series of cyclopropylthiazines as potent and orally efficacious BACE1 inhibitors. Lead optimization led to the identification of 20 , a molecule with biochemical IC 50 BACE2/BACE1 ratio of 47. Administration of 20 resulted in no skin/fur color change in a 13-day mouse hypopigmentation study and demonstrated robust and sustained reduction of CSF and brain Aβ 40 levels in rat and monkey pharmacodynamic models. On the basis of a compelling data package, 20 (AM-6494) was advanced to preclinical development.

    Organizational Affiliation: 

    School of Life Science, Tsinghua University, Beijing, 100084, China.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-secretase 1A411Homo sapiensMutation(s): 0 
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
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
P6J (Subject of Investigation/LOI)
Query on P6J
Download Ideal Coordinates CCD File 
G [auth A]N-{3-[(1S,5S,6S)-3-amino-1-(methoxymethyl)-5-methyl-2-thia-4-azabicyclo[4.1.0]hept-3-en-5-yl]-4,5-difluorophenyl}-5-[(prop-2-yn-1-yl)oxy]pyrazine-2-carboxamide
C22 H21 F2 N5 O3 S
IPUJINDWAGRAHN-KNXBSLHKSA-N		 Ligand Interaction
IOD
Query on IOD
Download Ideal Coordinates CCD File 
B [auth A],
C [auth A],
D [auth A]		IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M		 Ligand Interaction
GOL
Query on GOL
Download Ideal Coordinates CCD File 
E [auth A],
F [auth A]		GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
P6J Binding MOAD:  6PZ4 IC50: 0.4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.203 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 102.186α = 90
b = 102.186β = 90
c = 171.466γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALEPACKdata scaling
REFMACphasing

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

  • Deposited Date: 2019-07-31 
  • Released Date: 2019-10-23 
    • Deposition Author(s): Huang, X.

Revision History  (Full details and data files)

  • Version 1.0: 2019-10-23
    Type: Initial release
  • Version 1.1: 2019-10-30
    Changes: Data collection, Database references
  • Version 1.2: 2020-03-25
    Changes: Database references