ISDA

Entry Detail

PDB ID:

3LOX

Keywords:

Hydrolase/Hydrolase Inhibitor

Title:

HCV NS3-4a protease domain with a ketoamide inhibitor derivative of Boceprevir bound

Biological Source:

Source Organism:

Hepatitis C virus subtype 1a

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2010-02-04

Release Date:

2011-02-23

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.65 Å

R-Value Free:

0.27

R-Value Work:

0.19

Space Group:

H 3 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:HCV NS3 Protease
Chain IDs:A, C
Chain Length:200
Number of Molecules:2
Biological Source:Hepatitis C virus subtype 1a

UniProt ID:Q9ELS8 Pfam ID:PF02907

Ligand Molecules

BME

MCX

Peptide-like Molecules

PRD_000843

Primary Citation

The introduction of P4 substituted 1-methylcyclohexyl groups into Boceprevir: a change in direction in the search for a second generation HCV NS3 protease inhibitor.

Bennett, F, Huang, Y, Hendrata, S, Lovey, R, Bogen, S.L, Pan, W, Guo, Z, Prongay, A, Chen, K.X, Arasappan, A, Venkatraman, S, Velazquez, F, Nair, L, Sannigrahi, M, Tong, X, Pichardo, J, Cheng, K.C, Girijavallabhan, V.M, Saksena, A.K, Njoroge, F.G.Show

Bioorg.Med.Chem.Lett. 20 2617 2621 (2010)

PMID: 20303756 DOI: 10.1016/j.bmcl.2010.02.063

Abstact

In the search for a second generation HCV protease inhibitor, molecular modeling studies of the X-ray crystal structure of Boceprevir1 bound to the NS3 protein suggest that expansion into the S4 pocket could provide additional hydrophobic Van der Waals interactions. Effective replacement of the P4 tert-butyl with a cyclohexylmethyl ligand led to inhibitor 2 with improved enzyme and replicon activities. Subsequent modeling and SAR studies led to the pyridine 38 and sulfone analogues 52 and 53 with vastly improved PK parameters in monkeys, forming a new foundation for further exploration.

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Primary Citation of related structures