ATP enhances the error-prone ribonucleotide incorporation by the SARS-CoV-2 RNA polymerase.
ATP enhances the error-prone ribonucleotide incorporation by the SARS-CoV-2 RNA polymerase.
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DOI:
10.1016/j.bbrc.2022.07.087
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发表时间:
2022-10-15
影响因子:
3.1
通讯作者:
Kim, In-Kwon
中科院分区:
文献类型:
--
作者:
Pourfarjam, Yasin;Ma, Zhijun;Kim, In-Kwon
关键词:
The novel Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2 or COVID-19) has caused a global pandemic. The SARS-CoV-2 RNA genome is replicated by a conserved “core” replication-transcription complex (RTC) containing an error-prone RNA-dependent RNA polymerase holoenzyme (holo-RdRp, nsp12-nsp7-nsp8) and a RNA proofreading nuclease (nsp14-nsp10). Although structures and functions of SARS-CoV-2 holo-RdRp have been extensively studied and ribonucleotide-analog inhibitors, such as Remdesivir, have been treated for COVID-19 patients, the substrate and nucleotide specificity of SARS-CoV-2 holo-RdRp remain unknown. Here, our biochemical analysis of SARS-CoV-2 holo-RdRp reveals that it has a robust DNA-dependent RNA polymerase activity, in addition to its intrinsic RNA-dependent RNA polymerase activity. Strikingly, SARS-CoV-2 holo-RdRp fully extends RNAs with a low-fidelity even when only ATP and pyrimidine nucleotides, in particular CTP, are provided. This ATP-dependent error-prone ribonucleotide incorporation by SARS-CoV-2 holo-RdRp resists excision by the RNA proofreading nuclease in vitro. Our collective results suggest that a physiological concentration of ATP likely contributes to promoting the error-prone incorporation of ribonucleotides and ribonucleotide-analogs by SARS-CoV-2 holo-RdRp and provide a useful foundation to develop ribonucleotide analogs as an effective therapeutic strategy to combat coronavirus-mediated outbreak.
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影响因子:
16.6
作者:
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DOI:
10.1016/j.bbrc.2020.11.015
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10.1038/s41577-021-00592-1
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Nature reviews. Immunology
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4.6
作者:
Jockusch S;Tao C;Li X;Chien M;Kumar S;Morozova I;Kalachikov S;Russo JJ;Ju J
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Ju J