8Z8Q

Crystal structure of 2'-dG riboswitch

Summary for 8Z8Q

• Entry DOI: 10.2210/pdb8z8q/pdb
• Descriptor: RNA (71-MER), 2'-DEOXY-GUANOSINE (2 entities in total)
• Functional Keywords: riboswitch, 2'-dg, rna
• Biological source: Paenibacillus
• Total number of polymer chains: 2
• Total formula weight: 45939.37

Authors

Liao, W.,Ren, Y.,Huang, L. (deposition date: 2024-04-22, release date: 2025-03-19)

Primary citation

Ren, Y.,Lin, X.,Liao, W.,Peng, X.,Deng, J.,Zhang, Z.,Zhan, J.,Zhou, Y.,Westhof, E.,Lilley, D.M.J.,Wang, J.,Huang, L.
A general strategy for engineering GU base pairs to facilitate RNA crystallization.
Nucleic Acids Res., 53:-, 2025

PubMed Abstract: X-ray crystallography is a fundamental technique that provides atomic-level insights into RNA structures. However, obtaining crystals of RNA structures diffracting to high resolution is challenging. We introduce a simple strategy to enhance the resolution limit of RNA crystals by the selective substitution of Watson-Crick pairs by GU pairs within RNA sequences. Our approach has successfully yielded high-resolution structures for eight unique RNA crystals. Notably, six instances showed marked resolution enhancement upon GC/AU to GU base pair substitution, with two cases achieving high-resolution structures from initially poor data. In one case, reverting GU to GC base pairs also improved resolution. Our method facilitated the first structural determinations of the Long Interspersed Nuclear Element-1 and Olfactory Receptor family 4 subfamily K member 15 ribozymes, the 2'-deoxyguanosine-III riboswitch and the Broccoli RNA aptamer. The placement of GU base pairs within the first 5' helical stem of any given RNA species, or in one peripheral stem, is shown to be sufficient. These results offer a simple and effective approach for designing sequences or selecting sequences from homologous sequences, for high-resolution RNA structure determination.

PubMed: 39721592
DOI: 10.1093/nar/gkae1218

Experimental method

X-RAY DIFFRACTION (3.01 Å)