Structure-based investigations of the NAD+-II riboswitch.

Structure-based investigations of the NAD+-II riboswitch.
复制标题

NAD -II 核糖开关的基于结构的研究

DOI:
10.1093/nar/gkac1227
复制
发表时间:
2023-01-11
影响因子:
14.9
通讯作者:
Ren, Aiming
Ren, Aiming
中科院分区:
生物学2区
文献类型:
--
作者:
Xu, Xiaochen;Egger, Michaela;Li, Chunyan;Chen, Hao;Micura, Ronald;Ren, Aiming

文献摘要

参考文献

被引文献

相似文献

核糖开关是细菌 mRNA 中的保守非编码结构域,具有基因调节功能,对于维持酶辅因子代谢至关重要。最近,据报道,pnuC RNA 基序选择性结合烟酰胺腺嘌呤二核苷酸 (NAD+),根据系统发育分析定义了一类新型 NAD+ 核糖开关 (NAD+-II)。为了揭示该核糖开关的三维结构和配体结合模式,我们解析了NAD+-II核糖开关与NAD+复合物的晶体结构。引人注目的是,与为 NAD+ 的二磷酸腺苷 (ADP) 部分形成紧密识别口袋的 I 类核糖开关相反,II 类核糖开关为 NAD+ 的烟酰胺单核苷酸 (NMN) 部分形成结合口袋,并且仅表现出与腺苷的非特异性相互作用。我们通过单独与 NMN 复合的 II 类 RNA 的额外结构来支持这一发现。这些结构定义了一种新的 RNA 三级折叠,并通过突变分析结合等温滴定量热法 (ITC) 和基于 2-氨基嘌呤的荧光光谱折叠研究进一步证实。此外,我们将 pnuC RNA 基序截短为短的 RNA 螺旋支架,其结合亲和力与野生型基序相当,以暗示工程化 NAD+-II 基序用于生物技术应用的潜力。
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.
DOI: 10.3389/fmolb.2020.607158
发表时间: 2020
影响因子: 5
作者:
Scull CE;Dandpat SS;Romero RA;Walter NG
通讯作者: Walter NG
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
DOI: 10.1261/rna.077891.120
发表时间: 2021-01
期刊: RNA (New York, N.Y.)
影响因子: --
作者:
Panchapakesan SSS;Corey L;Malkowski SN;Higgs G;Breaker RR
通讯作者: Breaker RR
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
DOI: 10.1080/15476286.2021.1917891
发表时间: 2021-12
期刊: RNA biology
影响因子: 4.1
作者:
Brewer KI;Greenlee EB;Higgs G;Yu D;Mirihana Arachchilage G;Chen X;King N;White N;Breaker RR
通讯作者: Breaker RR