The mechanism of the nucleo-sugar selection by multi-subunit RNA polymerases.
The mechanism of the nucleo-sugar selection by multi-subunit RNA polymerases.
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多亚基RNA聚合酶选择核糖的机制。
DOI:
10.1038/s41467-021-21005-w
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发表时间:
2021-02-04
影响因子:
16.6
通讯作者:
Belogurov GA
中科院分区:
文献类型:
--
作者:
Mäkinen JJ;Shin Y;Vieras E;Virta P;Metsä-Ketelä M;Murakami KS;Belogurov GA
RNA polymerases (RNAPs) synthesize RNA from NTPs, whereas DNA polymerases synthesize DNA from 2′dNTPs. DNA polymerases select against NTPs by using steric gates to exclude the 2′OH, but RNAPs have to employ alternative selection strategies. In single-subunit RNAPs, a conserved Tyr residue discriminates against 2′dNTPs, whereas selectivity mechanisms of multi-subunit RNAPs remain hitherto unknown. Here, we show that a conserved Arg residue uses a two-pronged strategy to select against 2′dNTPs in multi-subunit RNAPs. The conserved Arg interacts with the 2′OH group to promote NTP binding, but selectively inhibits incorporation of 2′dNTPs by interacting with their 3′OH group to favor the catalytically-inert 2′-endo conformation of the deoxyribose moiety. This deformative action is an elegant example of an active selection against a substrate that is a substructure of the correct substrate. Our findings provide important insights into the evolutionary origins of biopolymers and the design of selective inhibitors of viral RNAPs. RNA and DNA polymerases need to discriminate efficiently against closely related nucleotide triphosphate substrates. Here, the authors show that a conserved Arg residue is the major determinant of selectivity against deoxyribonucleoside substrates by multisubunit RNA polymerases.
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影响因子:
16
作者:
Kireeva, Maria L.;Nedialkov, Yuri A.;Kashlev, Mikhail
通讯作者:
Kashlev, Mikhail
影响因子:
64.5
作者:
Maffioli SI;Zhang Y;Degen D;Carzaniga T;Del Gatto G;Serina S;Monciardini P;Mazzetti C;Guglierame P;Candiani G;Chiriac AI;Facchetti G;Kaltofen P;Sahl HG;Dehò G;Donadio S;Ebright RH
通讯作者:
Ebright RH
影响因子:
4.4
作者:
Iyer LM;Anantharaman V;Aravind L
通讯作者:
Aravind L
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
1.2
作者:
Kozlov, IA;Orgel, LE
通讯作者:
Orgel, LE