8XZQ

Crystal structure of folE riboswitch with 8-N Guanine

8XZQ の概要

• エントリーDOI: 10.2210/pdb8xzq/pdb
• 分子名称: RNA (53-MER), 5-AMINO-1H-[1,2,3]TRIAZOLO[4,5-D]PYRIMIDIN-7-OL, SPERMINE, ... (5 entities in total)
• 機能のキーワード: riboswitch, 8-n guanine, rna
• 由来する生物種: unidentified eubacterium clone A70
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 17698.63

構造登録者

Li, C.Y.,Ren, A.M. (登録日: 2024-01-21, 公開日: 2024-07-24, 最終更新日: 2024-08-21)

主引用文献

Li, C.,Xu, X.,Geng, Z.,Zheng, L.,Song, Q.,Shen, X.,Wu, J.,Zhao, J.,Li, H.,He, M.,Tai, X.,Zhang, L.,Ma, J.,Dong, Y.,Ren, A.
Structure-based characterization and compound identification of the wild-type THF class-II riboswitch.
Nucleic Acids Res., 52:8454-8465, 2024

PubMed Abstract: Riboswitches are conserved regulatory RNA elements participating in various metabolic pathways. Recently, a novel RNA motif known as the folE RNA motif was discovered upstream of folE genes. It specifically senses tetrahydrofolate (THF) and is therefore termed THF-II riboswitch. To unravel the ligand recognition mechanism of this newly discovered riboswitch and decipher the underlying principles governing its tertiary folding, we determined both the free-form and bound-form THF-II riboswitch in the wild-type sequences. Combining structural information and isothermal titration calorimetry (ITC) binding assays on structure-based mutants, we successfully elucidated the significant long-range interactions governing the function of THF-II riboswitch and identified additional compounds, including alternative natural metabolites and potential lead compounds for drug discovery, that interact with THF-II riboswitch. Our structural research on the ligand recognition mechanism of the THF-II riboswitch not only paves the way for identification of compounds targeting riboswitches, but also facilitates the exploration of THF analogs in diverse biological contexts or for therapeutic applications.

PubMed: 38769061
DOI: 10.1093/nar/gkae377

実験手法

X-RAY DIFFRACTION (1.83 Å)