Fragment-wise design of inhibitors to 3C proteinase from enterovirus 71.


BACKGROUND Enterovirus 71 (EV71) is a causative agent of hand, foot and mouth disease (HFMD), which can spread its infection to central nervous and other systems with severe consequence. A key factor in the replication of EV71 is its 3C proteinase (3C(pro)), a significant drug target. Peptidomimetics were employed as inhibitors of this enzyme for developing antivirals. However, the peptide bonds in these peptidomimetics are a source of low bioavailability due to their susceptibility to protease digestion. To produce non-peptidomimetic inhibitors by replacing these peptide bonds, it would be important to gain better understanding on the contribution of each component to the interaction and potency. METHODS A series of compounds of different lengths targeting 3C(pro) and having an α,β-unsaturated ester as the warhead were synthesized and their interactions with the enzyme were evaluated by complex structure analyses and potency assays for a better understanding on the relationship between potency and evolution of interaction. RESULTS The P2 moiety of the compound would need to be oriented to interact in the S2 site in the substrate binding cleft and the P3-P4 moieties were required to generate sufficient potency. A hydrophobic terminal group will benefit the cellular uptake and improve the activity in vivo. CONCLUSIONS AND GENERAL SIGNIFICANCE The data presented here provide a basis for designing a new generation of non-peptidomimetics to target EV71 3C(pro).

DOI: 10.1016/j.bbagen.2016.03.017

Cite this paper

@article{Wu2016FragmentwiseDO, title={Fragment-wise design of inhibitors to 3C proteinase from enterovirus 71.}, author={Caiming Wu and Lanjun Zhang and Peng Li and Qixu Cai and Xuanjia Peng and K N Yin and Xinsheng Chen and Haixia Ren and Shilin Zhong and Yuwei Weng and Yi Guan and Shuhui Chen and Jinzhun Wu and Jian Li and Tianwei Lin}, journal={Biochimica et biophysica acta}, year={2016}, volume={1860 6}, pages={1299-307} }