Characterization of the guanine-N7 methyltransferase activity of coronavirus nsp14 on nucleotide GTP.
Characterization of the guanine-N7 methyltransferase activity of coronavirus nsp14 on nucleotide GTP.
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冠状病毒nsp14对核苷酸GTP的鸟嘌呤-N7甲基转移酶活性的表征
DOI:
10.1016/j.virusres.2013.05.001
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发表时间:
2013-09
期刊:
影响因子:
5
通讯作者:
Guo D
中科院分区:
文献类型:
--
作者:
Jin X;Chen Y;Sun Y;Zeng C;Wang Y;Tao J;Wu A;Yu X;Zhang Z;Tian J;Guo D
We found SARS-CoV nsp14 could methylate GTP and dGTP. Critical residues of nsp14 essential for the activity on GTP were identified. m7GTP or nsp14 could interfere with protein translation. Most eukaryotic viruses that replicate in the cytoplasm, including coronaviruses, have evolved strategies to cap their RNAs. In our previous work, the nonstructural protein (nsp) 14 of severe acute respiratory syndrome coronavirus (SARS-CoV) was identified as a cap (guanine-N7)-methyltransferase (N7-MTase). In this study, we found that GTP, dGTP as well as cap analogs GpppG, GpppA and m7GpppG could be methylated by SARS-CoV nsp14. In contrast, the nsp14 could not modify ATP, CTP, UTP, dATP, dCTP, dUTP or cap analog m7GpppA. Critical residues of nsp14 essential for the methyltransferase activity on GTP were identified, which include F73, R84, W86, R310, D331, G333, P335, Y368, C414, and C416. We further showed that the methyltransferase activity of GTP was universal for nsp14 of other coronaviruses. Moreover, the accumulation of m7GTP or presence of protein nsp14 could interfere with protein translation of cellular mRNAs. Altogether, the results revealed a new enzymatic activity of coronavirus nsp14.
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影响因子:
5
作者:
Gorbalenya AE;Enjuanes L;Ziebuhr J;Snijder EJ
通讯作者:
Snijder EJ
DOI:
10.1073/pnas.0603144103
发表时间:
2006-08-22
影响因子:
11.1
作者:
Kamitani, Wataru;Narayanan, Krishna;Makino, Shinji
通讯作者:
Makino, Shinji
影响因子:
5.4
作者:
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通讯作者:
STOHLMAN, SA
影响因子:
14.9
作者:
Schwer, B;Mao, XD;Shuman, S
通讯作者:
Shuman, S
影响因子:
5.4
作者:
LAAKKONEN, P;HYVONEN, M;KAARIAINEN, L
通讯作者:
KAARIAINEN, L