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. 2004 Mar 11;32(5):1666–1677. doi: 10.1093/nar/gkh333

Figure 5.

Figure 5

Stereo views of three selected conformational RNA families identified in the 23S and 5S rRNA of the crystal structure of the 50S ribosomal subunit (NDB code RR0033, PDB code 1JJ2) (1,9): (a) conformation 1 with Z-DNA-like backbone but both bases in the anti orientation; (b) conformation 2 which is seen in the tetraloops with sequences RNRN; (c) conformation 7 with parallel bases as in the adenine platform. For further description of the conformations see Table 3 and text. Overlaps of individual dinucleotides are shown by thin lines. The representative averaged conformation is shown as ball-and-stick model using the chemical convention for coloring. The canonical A-RNA (pale green) is superimposed on the average conformation.