ISDA

Entry Detail

PDB ID:

3E51

Keywords:

TRANSFERASE

Title:

Crystal structure of HCV NS5B polymerase with a novel pyridazinone inhibitor

Biological Source:

Source Organism:

Hepatitis C virus (isolate BK)

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

2008-08-12

Release Date:

2009-08-18

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.90 Å

R-Value Free:

0.27

R-Value Work:

0.22

R-Value Observed:

0.22

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

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

UniProt ID:P26663 Pfam ID:PF00998 EC:3.4.21.98

Ligand Molecules

N35

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 5: Exploration of pyridazinones containing 6-amino-substituents.

Dragovich, P.S, Blazel, J.K, Ellis, D.A, Han, Q, Kamran, R, Kissinger, C.R, LeBrun, L.A, Li, L.S, Murphy, D.E, Noble, M, Patel, R.A, Ruebsam, F, Sergeeva, M.V, Shah, A.M, Showalter, R.E, Tran, C.V, Tsan, M, Webber, S.E, Kirkovsky, L, Zhou, Y.Show

Bioorg.Med.Chem.Lett. 18 5635 5639 (2008)

PMID: 18796353 DOI: 10.1016/j.bmcl.2008.08.094

Abstact

The synthesis of 4-(1',1'-dioxo-1',4'-dihydro-1'lambda(6)-benzo[1',2',4']thiadiazin-3'-yl)-5-hydroxy-2H-pyridazin-3-ones bearing 6-amino substituents as potent inhibitors of the HCV RNA-dependent RNA polymerase (NS5B) is described. Several of these agents also display potent antiviral activity in cell culture experiments (EC(50)<0.10 microM). In vitro DMPK data (microsome t(1/2), Caco-2 P(app)) for many of the compounds are also disclosed, and a crystal structure of a representative inhibitor complexed with the NS5B protein is discussed.

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