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. 2019 Nov;25(11):1439–1456. doi: 10.1261/rna.071944.119

FIGURE 9.

FIGURE 9.

A hydrogen bonding network discovered in the course of a transition state mimic MD simulation, whereby the 2′-OH of P32 acidifies metal-bound water that is poised to protonate the leaving group. Another metal-bound water donates hydrogen bonds to both the pro-RP NPO of the scissile phosphate and the O6 of G33. The MgC metal coordinates three additional waters that are hidden for clarity.