Figure 4.

Examining water‐mediated interactions between p19 and bound RNA at position 111. Three‐way alignment of p19‐WT (grey) p19‐T111H (green) and p19‐T111S (yellow) structures reveals that an ordered water molecule engaged by both the WT threonine (grey) and the mutant serine (yellow) through a hydrogen bond is displaced by the histidine in the p19‐T111H structure (green).