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-Structure paper
タイトル | Structural basis for difunctional mechanism of m-AMSA against African swine fever virus pP1192R. |
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ジャーナル・号・ページ | Nucleic Acids Res, Vol. 52, Issue 18, Page 11301-11316, Year 2024 |
掲載日 | 2024年10月14日 |
著者 | Ruili Liu / Junqing Sun / Lian-Feng Li / Yingxian Cheng / Meilin Li / Lifeng Fu / Su Li / Guorui Peng / Yanjin Wang / Sheng Liu / Xiao Qu / Jiaqi Ran / Xiaomei Li / Erqi Pang / Hua-Ji Qiu / Yanli Wang / Jianxun Qi / Han Wang / George Fu Gao / |
PubMed 要旨 | The African swine fever virus (ASFV) type II topoisomerase (Topo II), pP1192R, is the only known Topo II expressed by mammalian viruses and is essential for ASFV replication in the host cytoplasm. ...The African swine fever virus (ASFV) type II topoisomerase (Topo II), pP1192R, is the only known Topo II expressed by mammalian viruses and is essential for ASFV replication in the host cytoplasm. Herein, we report the structures of pP1192R in various enzymatic stages using both X-ray crystallography and single-particle cryo-electron microscopy. Our data structurally define the pP1192R-modulated DNA topology changes. By presenting the A2+-like metal ion at the pre-cleavage site, the pP1192R-DNA-m-AMSA complex structure provides support for the classical two-metal mechanism in Topo II-mediated DNA cleavage and a better explanation for nucleophile formation. The unique inhibitor selectivity of pP1192R and the difunctional mechanism of pP1192R inhibition by m-AMSA highlight the specificity of viral Topo II in the poison binding site. Altogether, this study provides the information applicable to the development of a pP1192R-targeting anti-ASFV strategy. |
リンク | Nucleic Acids Res / PubMed:39166497 / PubMed Central |
手法 | EM (単粒子) / X線回折 |
解像度 | 1.3 - 3.23 Å |
構造データ | EMDB-39077: pP1192R-DNA-m-AMSA complex Overall-2 EMDB-39078: pP1192R-DNA-m-AMSA complex Overall-1 EMDB-39245, PDB-8yge: EMDB-39249, PDB-8ygg: EMDB-39250, PDB-8ygh: PDB-8yik: |
化合物 | ChemComp-MG: ChemComp-ASW: ChemComp-ATP: ChemComp-HOH: |
由来 |
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キーワード | ISOMERASE/DNA / ASFV / PROTEIN BINDING / ISOMERASE-DNA complex / ISOMERASE |