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Figure 3.
Figure 3. Features of the Vts1p-SAM–RNA binding interface.
(a) Schematic diagram of SRE recognition by Vts1p-SAM. Black
dashed lines, hydrogen bonds; green dashed lines, hydrophobic
interactions; blue background, the stem of the SRE; pink
background, the pentaloop; red circles, phosphate groups; blue
ovals, bridging water molecules. The labeled protein residues
are colored according to their originating secondary structure
elements as shown in the upper left schematic. (b) Stereo
diagram of the Vts1p-SAM–SRE binding interface centered on SRE
loop position G3. Red spheres, water molecules participating in
bridging interactions between protein and RNA; dashed lines,
hydrogen bonds involving the G3 base.
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