ISDA

Deposition Date 2008-02-26

Release Date 2009-03-03

Last Version Date 2024-04-03

Entry Detail

PDB ID:

3CDE

Keywords:

TRANSFERASE

Title:

Crystal structure of HCV NS5B polymerase with a novel Pyridazinone inhibitor

Biological Source:

Source Organism:

Hepatitis C virus (Taxon ID: )

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.10 Å

R-Value Free:

0.22

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:RNA-directed RNA polymerase
Mutations:R544Q
Chain IDs:A, B
Chain Length:578
Number of Molecules:2
Biological Source:Hepatitis C virus

UniProt ID:P26663 Pfam ID:PF00998 EC:3.4.21.98

Ligand Molecules

N3H

Primary Citation

Novel HCV NS5B polymerase inhibitors derived from 4-(1',1'-dioxo-1',4'-dihydro-1'lambda(6)-benzo[1',2',4']thiadiazin-3'-yl)-5-hydroxy-2H-pyridazin-3-ones. Part 3: Further optimization of the 2-, 6-, and 7'-substituents and initial pharmacokinetic assessments.

Li, L.S, Zhou, Y, Murphy, D.E, Stankovic, N, Zhao, J, Dragovich, P.S, Bertolini, T, Sun, Z, Ayida, B, Tran, C.V, Ruebsam, F, Webber, S.E, Shah, A.M, Tsan, M, Showalter, R.E, Patel, R, Lebrun, L.A, Bartkowski, D.M, Nolan, T.G, Norris, D.A, Kamran, R, Brooks, J, Sergeeva, M.V, Kirkovsky, L, Zhao, Q, Kissinger, C.R.Show

Bioorg.Med.Chem.Lett. 18 3446 3455 (2008)

PMID: 18457949 DOI: 10.1016/j.bmcl.2008.02.072

Abstact

5-Hydroxy-3(2H)-pyridazinone derivatives were investigated as inhibitors of genotype 1 HCV NS5B polymerase. Lead optimization led to the discovery of compound 3a, which displayed potent inhibitory activities in biochemical and replicon assays [IC(50) (1b)<10nM; IC(50) (1a)=22 nM; EC(50) (1b)=5nM], good stability toward human liver microsomes (HLM t(1/2)>60 min), and high ratios of liver to plasma concentrations 12h after a single oral administration to rats.

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