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-Structure paper
| タイトル | An adenosine analog shows high antiviral potency against coronavirus and arenavirus mainly through an unusual base pairing mode. |
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| ジャーナル・号・ページ | Nat Commun, Vol. 15, Issue 1, Page 10750, Year 2024 |
| 掲載日 | 2024年12月30日 |
著者 | Xiaoying Jia / Xuping Jing / Ming Li / Minli Gao / Yao Zhong / Entao Li / Yang Liu / Rui Li / Guoqiang Yao / Qiaojie Liu / Minmin Zhou / Yuxia Hou / Linfeng An / Yibao Hong / Shanshan Li / Jiancun Zhang / Wei Wang / Kaiming Zhang / Peng Gong / Sandra Chiu / ![]() |
| PubMed 要旨 | By targeting the essential viral RNA-dependent RNA polymerase (RdRP), nucleoside analogs (NAs) have exhibited great potential in antiviral therapy for RNA virus-related diseases. However, most ribose- ...By targeting the essential viral RNA-dependent RNA polymerase (RdRP), nucleoside analogs (NAs) have exhibited great potential in antiviral therapy for RNA virus-related diseases. However, most ribose-modified NAs do not present broad-spectrum features, likely due to differences in ribose-RdRP interactions across virus families. Here, we show that HNC-1664, an adenosine analog with modifications both in ribose and base, has broad-spectrum antiviral activity against positive-strand coronaviruses and negative-strand arenaviruses. Importantly, treatment with HNC-1664 demonstrate anti-SARS-CoV-2 efficacy in infected K18-human ACE2 mice, with reduced viral titer and mortality, as well as improved lung injury. Enzymology data demonstrate that HNC-1664 inhibits RNA synthesis mainly at the pre-catalysis stage. The cryo-EM structures of HNC-1664-bound RdRP-RNA complexes from both SARS-CoV-2 and LASV reveal an unusual base pairing mode of HNC-1664 in part due to its base modification, thus revealing its great potency in binding but not catalysis. Under certain circumstances, 1664-TP can be slowly incorporated by RdRP through regular Watson-Crick base pairing, as evidenced by enzymology data and an HNC-1664-incorporated crystal structure of the RdRP-RNA complex. Overall, HNC-1664 achieves broad-spectrum characteristics by favoring an alternative base pairing strategy to non-catalytically block RNA synthesis, providing a novel concept for the rational development of NA drugs. |
リンク | Nat Commun / PubMed:39737930 / PubMed Central |
| 手法 | EM (単粒子) / X線回折 |
| 解像度 | 3 - 3.29 Å |
| 構造データ | EMDB-38422, PDB-8xko: EMDB-38557, PDB-8xpo: ![]() PDB-8xpp: |
| 化合物 | ![]() PDB-1lvz: ![]() ChemComp-MG: ![]() ChemComp-ZN: |
| 由来 |
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キーワード | VIRAL PROTEIN/RNA / RNA dependent RNA polymerase / SARS-CoV-2 / nucleoside analog / VIRAL PROTEIN / VIRAL PROTEIN-RNA complex / REPLICATION / Lassa virus / RNA-dependent RNA polymerase / elongation complex / enterovirus 71 |
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severe acute respiratory syndrome coronavirus (SARS コロナウイルス)
enterovirus a71 (エンテロウイルス)
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