Non-Watson–Crick base pairs in crystal structures of studied SRD motifs

<p><b>Copyright information:</b></p><p>Taken from "Molecular dynamics simulations of sarcin–ricin rRNA motif"</p><p>Nucleic Acids Research 2006;34(2):697-708.</p><p>Published online 2 Feb 2006</p><p>PMCID:PMC1360246.</p><p>© The Author 2006. Published by Oxford University Press. All rights reserved</p> Tetraloop region, () SE/H G/A base pair; G-bulged region, () G/U/A triplet of SE/H G/U and WC/H U/A base pairs; flexible region, () H water-mediated A/C base pair; () SE/H water-mediated U/C base pair, () H A/A base pair and () SE/H C/C base pair. (a–d) are based on the crystal structure of ECOLI system (PDB, 1Q9A), (e and f) are based on the crystal structure of mutated RAT system (PDB, 1Q96). () Stereo view of the flexible region of the RAT crystal structure (PDB, 430D) with unpaired bases in A/A and C/C base pairs (highlighted)