Download MendeleyX-ray structures of NS1 effector domain mutants.
Xia, S., Robertus, J.D.(2010) Arch Biochem Biophys 494: 198-204
- PubMed: 19995550
- DOI: https://doi.org/10.1016/j.abb.2009.12.008
- Primary Citation of Related Structures:
3KWG, 3KWI - PubMed Abstract:
The influenza A virus nonstructural protein NS1 is a multifunctional dimeric protein that acts as a potent inhibitor of the host cellular antiviral state. The C-terminal effector domain of NS1 binds host proteins, including CPSF30, and is a target for the development of new antiviral drugs. Here we present crystallographic structures of two mutant effector domains, W187Y and W187A, of influenza A/Udorn/72 virus. Unlike wild-type, the mutants behave exclusively as monomers in solution based on gel filtration data and light scattering. The W187Y mutant is able to bind CPSF30 with a binding affinity close to the wild-type protein; that is, it retains a receptor site for aromatic ligands nearly identical to the wild-type. Therefore, this monomeric mutant protein could serve as a drug target for a high throughput inhibitor screening assays, since its binding pocket is unoccupied in solution and potentially more accessible to small molecule ligands.
Organizational Affiliation:
Institute for Cellular and Molecular Biology, Department of Chemistry and Biochemistry, University of Texas, 1 University Station A5300, Austin, TX 78712, USA.
