8zau

Crystal structure of a methyl transferase ribozyme mutant - C29U and A59G

spinqualitylabelsall models 8zau, resolution 2.43Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8zau is a 1 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.43Å Ligands: 1MA, BA, GUN, NA, PO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed 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. A general strategy for engineering GU base pairs to facilitate RNA crystallization.,Ren Y, Lin X, Liao W, Peng X, Deng J, Zhang Z, Zhan J, Zhou Y, Westhof E, Lilley DMJ, Wang J, Huang L Nucleic Acids Res. 2025 Jan 24;53(3):gkae1218. doi: 10.1093/nar/gkae1218. PMID:39721592 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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