Influenza virus causes severe respiratory infections that are responsible for up to half a million deaths worldwide each year. Two inhibitors targeting viral neuraminidase have been approved to date (oseltamivir, zanamivir). However, the rapid development of antiviral drug resistance and the efficient transmission of resistant viruses among humans represent serious threats to public health. The approved influenza neuraminidase inhibitors have (oxa)cyclohexene scaffolds designed to mimic the oxonium transition state during enzymatic cleavage of sialic acid. Their active forms contain a carboxylate that interacts with three arginine residues in the enzyme active site. Recently, the phosphonate group was successfully used as an isostere of the carboxylate in oseltamivir, and the resulting compound, tamiphosphor, was identified as a highly active neuraminidase inhibitor. However, the structure of the complex of this promising inhibitor with neuraminidase has not yet been reported. Here, we analyzed the interaction of a set of oseltamivir and tamiphosphor derivatives with neuraminidase from the A/California/07/2009 (H1N1) influenza virus. We thermodynamically characterized the binding of oseltamivir carboxylate or tamiphosphor to the neuraminidase catalytic domain by protein microcalorimetry, and we determined crystal structure of the catalytic domain in complex with tamiphosphor at 1.8 Å resolution. This structural information should aid rational design of the next generation of neuraminidase inhibitors.

• MeSH
• antivirové látky chemie   farmakologie   MeSH
• chřipka lidská virologie   MeSH
• inhibitory enzymů chemie   farmakologie   MeSH
• katalytická doména MeSH
• kinetika MeSH
• kyseliny fosforité metabolismus   terapeutické užití   MeSH
• lidé MeSH
• neuraminidasa antagonisté a inhibitory   metabolismus   MeSH
• oseltamivir analogy a deriváty   metabolismus   terapeutické užití   MeSH
• pandemie MeSH
• termodynamika MeSH
• vazba proteinů MeSH
• virus chřipky A, podtyp H1N1 enzymologie   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH