ISDA

Deposition Date 2012-08-09

Release Date 2012-10-03

Last Version Date 2023-12-20

Entry Detail

PDB ID:

4B6E

Keywords:

HYDROLASE

Title:

Discovery of an allosteric mechanism for the regulation of HCV NS3 protein function

Biological Source:

Source Organism:

HEPATITIS C VIRUS (ISOLATE BK) (Taxon ID: 11105)

Host Organism:

ESCHERICHIA COLI

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.46 Å

R-Value Free:

0.25

R-Value Work:

0.18

R-Value Observed:

0.19

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:NON-STRUCTURAL PROTEIN 4A, SERINE PROTEASE NS3
Chain IDs:A, B
Chain Length:683
Number of Molecules:2
Biological Source:HEPATITIS C VIRUS (ISOLATE BK)

UniProt ID:P26663 Pfam ID:PF02907, PF07652, PF22027 EC:3.4.21.98

Ligand Molecules

10L

SO4

Primary Citation

Discovery of an Allosteric Mechanism for the Regulation of Hcv Ns3 Protein Function.

Saalau-Bethell, S.M, Woodhead, A.J, Chessari, G, Carr, M.G, Coyle, J, Graham, B, Hiscock, S.D, Murray, C.W, Pathuri, P, Rich, S.J, Richardson, C.J, Williams, P.A, Jhoti, H.Show

Nat.Chem.Biol. 8 920 ? (2012)

PMID: 23023261 DOI: 10.1038/NCHEMBIO.1081

Abstact

Here we report a highly conserved new binding site located at the interface between the protease and helicase domains of the hepatitis C virus (HCV) NS3 protein. Using a chemical lead, identified by fragment screening and structure-guided design, we demonstrate that this site has a regulatory function on the protease activity via an allosteric mechanism. We propose that compounds binding at this allosteric site inhibit the function of the NS3 protein by stabilizing an inactive conformation and thus represent a new class of direct-acting antiviral agents.

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Primary Citation of related structures