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| Title | Differential inhibition of Morbillivirus and Henipavirus polymerases by ERDRP-0519 and structure-guided inhibitor optimization. |
|---|---|
| Journal, issue, pages | Cell, Year 2026 |
| Publish date | Apr 29, 2026 |
Authors | Lu Xue / Jiacheng Gui / Shenghua Gao / Xiaoxiao Gao / Tiancai Chang / Hainei Pan / Jielin Tang / Mingxia Zhang / Zimu Li / Binqian Zou / Heyu Zhao / Longyu Wang / Mei Li / Lijun Rong / Richard K Plemper / Xinwen Chen / Jun He / Rongjuan Pei / Peng Zhan / Xiaoli Xiong / ![]() |
| PubMed Abstract | ERDRP-0519 is a non-nucleoside polymerase inhibitor developed against measles virus (MeV) of the Morbillivirus genus. Here, we show that ERDRP-0519 also cross-inhibits Nipah virus (NiV) of the ...ERDRP-0519 is a non-nucleoside polymerase inhibitor developed against measles virus (MeV) of the Morbillivirus genus. Here, we show that ERDRP-0519 also cross-inhibits Nipah virus (NiV) of the Henipavirus genus with reduced potency. ERDRP-0519 binds to a shared pocket within the RNA-dependent RNA polymerase (RdRp) palm domains of MeV, peste des petits ruminants virus (PPRV), and NiV polymerases. ERDRP-0519 forms more extensive interactions with Morbillivirus polymerases, whereas binding to NiV polymerase requires substantial RdRp motif rearrangements, likely incurring an energetic cost and resulting in reduced affinity. ERDRP-0519 binding impedes RNA synthesis by sterically blocking RNA and nucleotide binding. Guided by these insights, we designed GL22 and G671, ERDRP-0519 derivatives with extended moieties that engage additional cross-domain RdRp contacts in the NiV polymerase. These derivatives exert more extensive steric hindrance to RNA and nucleotide binding, enhancing biochemical inhibition potency. These findings elucidate the molecular mechanism of ERDRP-0519 action and guide structure-based inhibitor design. |
External links | Cell / PubMed:42061399 |
| Methods | EM (single particle) |
| Resolution | 2.4 - 2.92 Å |
| Structure data | EMDB-65442, PDB-9vxv: EMDB-65444, PDB-9vxx: EMDB-65445, PDB-9vxy: EMDB-65446, PDB-9vxz: EMDB-65447, PDB-9vy0: EMDB-65448, PDB-9vy1: EMDB-68072, PDB-21xo: |
| Chemicals | ![]() PDB-1e3h: ![]() ChemComp-ZN: ![]() PDB-1ef9: ![]() PDB-1et4: |
| Source |
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Keywords | VIRAL PROTEIN / Polymerase / inhibitor / nipah virus / complex / REPLICATION / Measles virus / RNA / Peste Des Petits Ruminants Virus |
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henipavirus nipahense
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