Download MendeleyUtilization of Nitrophenylphosphates and Oxime-Based Ligation for the Development of Nanomolar Affinity Inhibitors of the Yersinia Pestis Outer Protein H (Yoph) Phosphatase.
Bahta, M., Lountos, G.T., Dyas, B., Kim, S., Ulrich, R.G., Waugh, D.S., Burke, T.R.(2011) J Med Chem 54: 2933
- PubMed: 21443195 Search on PubMedSearch on PubMed Central
- DOI: https://doi.org/10.1021/jm200022g
- Primary Citation Related Structures:
2Y2F - PubMed Abstract:
Our current study reports the first K(M) optimization of a library of nitrophenylphosphate-containing substrates for generating an inhibitor lead against the Yersinia pestis outer protein phosphatase (YopH). A high activity substrate identified by this method (K(M) = 80 μM) was converted from a substrate into an inhibitor by replacement of its phosphate group with difluoromethylphosphonic acid and by attachment of an aminooxy handle for further structural optimization by oxime ligation. A cocrystal structure of this aminooxy-containing platform in complex with YopH allowed the identification of a conserved water molecule proximal to the aminooxy group that was subsequently employed for the design of furanyl-based oxime derivatives. By this process, a potent (IC(50) = 190 nM) and nonpromiscuous inhibitor was developed with good YopH selectivity relative to a panel of phosphatases. The inhibitor showed significant inhibition of intracellular Y. pestis replication at a noncytotoxic concentration. The current work presents general approaches to PTP inhibitor development that may be useful beyond YopH.
- Chemical Biology Laboratory, Molecular Discovery Program, Center for Cancer Research, National Cancer Institute, National Institutes of Health, NCI-Frederick, Frederick, Maryland 21702, United States.
Organizational Affiliation:
