2VA7 image
Entry Detail
PDB ID:
2VA7
Keywords:
Title:
X-ray crystal structure of beta secretase complexed with compound 27
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2007-08-30
Release Date:
2007-11-13
Method Details:
Experimental Method:
Resolution:
2.20 Å
R-Value Free:
0.28
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
P 61 2 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:BETA-SECRETASE 1 .
Mutations:YES
Chain IDs:A
Chain Length:455
Number of Molecules:1
Biological Source:HOMO SAPIENS
Primary Citation
Application of Fragment-Based Lead Generation to the Discovery of Novel, Cyclic Amidine Beta-Secretase Inhibitors with Nanomolar Potency, Cellular Activity, and High Ligand Efficiency.
J.Med.Chem. 50 5912 ? (2007)
PMID: 17985862 DOI: 10.1021/JM070829P

Abstact

Fragment-based lead generation has led to the discovery of a novel series of cyclic amidine-based inhibitors of beta-secretase (BACE-1). Initial fragment hits with an isocytosine core having millimolar potency were identified via NMR affinity screening. Structure-guided evolution of these fragments using X-ray crystallography together with potency determination using surface plasmon resonance and functional enzyme inhibition assays afforded micromolar inhibitors. Similarity searching around the isocytosine core led to the identification of a related series of inhibitors, the dihydroisocytosines. By leveraging the knowledge of the ligand-BACE-1 recognition features generated from the isocytosines, the dihydroisocytosines were efficiently optimized to submicromolar potency. Compound 29, with an IC50 of 80 nM, a ligand efficiency of 0.37, and cellular activity of 470 nM, emerged as the lead structure for future optimization.

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