6rt4

The YTH domain of YTHDC1 protein in complex with m6ACU oligonucleotide

spinqualitylabelsall models 6rt4, resolution 1.49Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6rt4 is a 4 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 1.49Å Ligands: 6MZ, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function YTDC1_HUMAN RNA-binding protein that regulates alternative splice site selection. Publication Abstract from PubMed N6-methyladenosine (m(6)A) is the most prevalent chemical modification in human mRNAs. Its recognition by reader proteins enables many cellular functions, including splicing and translation of mRNAs. However, the binding mechanisms of m(6)A-containing RNAs to their readers are still elusive due to the unclear roles of m(6)A-flanking ribonucleotides. Here, we use a model system, YTHDC1 with its RNA motif 5'-G-2G-1(m(6)A)C+1U+2-3', to investigate the binding mechanisms by atomistic simulations, X-ray crystallography, and isothermal titration calorimetry. The experimental data and simulation results show that m(6)A is captured by an aromatic cage of YTHDC1 and the 3' terminus nucleotides are stabilized by cation-pi-pi interactions, while the 5' terminus remains flexible. Moreover, simulations of unbound RNA motifs reveal that the methyl group of m(6)A and the 5' terminus shift the conformational preferences of the oligoribonucleotides to the bound-like conformation, thereby facilitating the association process. The binding mechanisms may help in the discovery of chemical probes against m(6)A reader proteins. Flexible binding of m(6)A reader protein YTHDC1 to its preferred RNA motif.,Li Y, Bedi RK, Wiedmer L, Huang D, Sledz P, Caflisch A J Chem Theory Comput. 2019 Oct 31. doi: 10.1021/acs.jctc.9b00987. PMID:31670957 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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