Structure-based investigations of the NAD+-II riboswitch.
Structure-based investigations of the NAD+-II riboswitch.
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NAD -II 核糖开关的基于结构的研究
DOI:
10.1093/nar/gkac1227
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发表时间:
2023-01-11
影响因子:
14.9
通讯作者:
Ren, Aiming
中科院分区:
文献类型:
--
作者:
Xu, Xiaochen;Egger, Michaela;Li, Chunyan;Chen, Hao;Micura, Ronald;Ren, Aiming
Riboswitches are conserved non-coding domains in bacterial mRNA with gene regulation function that are essential for maintaining enzyme co-factor metabolism. Recently, the pnuC RNA motif was reported to selectively bind nicotinamide adenine dinucleotide (NAD+), defining a novel class of NAD+ riboswitches (NAD+-II) according to phylogenetic analysis. To reveal the three-dimensional architecture and the ligand-binding mode of this riboswitch, we solved the crystal structure of NAD+-II riboswitch in complex with NAD+. Strikingly and in contrast to class-I riboswitches that form a tight recognition pocket for the adenosine diphosphate (ADP) moiety of NAD+, the class-II riboswitches form a binding pocket for the nicotinamide mononucleotide (NMN) portion of NAD+ and display only unspecific interactions with the adenosine. We support this finding by an additional structure of the class-II RNA in complex with NMN alone. The structures define a novel RNA tertiary fold that was further confirmed by mutational analysis in combination with isothermal titration calorimetry (ITC), and 2-aminopurine-based fluorescence spectroscopic folding studies. Furthermore, we truncated the pnuC RNA motif to a short RNA helical scaffold with binding affinity comparable to the wild-type motif to allude to the potential of engineering the NAD+-II motif for biotechnological applications.
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影响因子:
5
作者:
Scull CE;Dandpat SS;Romero RA;Walter NG
通讯作者:
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DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
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作者:
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通讯作者:
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DOI:
10.1261/rna.077891.120
发表时间:
2021-01
期刊:
RNA (New York, N.Y.)
影响因子:
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作者:
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通讯作者:
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DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH
影响因子:
4.1
作者:
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通讯作者:
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