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Figure 1.
Figure 1. Location of the SD Helix on the 30S Ribosomal
Subunit
(A–C) The rRNA and the ribosomal proteins are
colored light blue and pale pink, respectively. (A) Front
(subunit interface), side (rotated 145° counterclockwise),
and back (solvent) views of the 30S subunit, with the SD helix
accommodated in a cavity formed between the head (orange) and
platform (green) domains. Oligonucleotides (5′-GAAAGA-3′)
are colored yellow, and the 3′ end nucleotides of 16S rRNA
from A1534, which were clearly identified in the present
structure, but were disordered in previous structures, are
colored dark blue. (B) Stereo enlargement of the boxed region in
the side view of (A). RNA helices from the head (h28 and h37)
and platform (h23a and h26) domains are dark orange and dark
green, respectively. The ribosomal proteins surrounding the
cavity are colored salmon. (C) Stereo view of the SD helix
position on the 30S subunit, which is represented as a molecular
surface.
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