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. 2015 Apr 24;54(21):3269–3285. doi: 10.1021/acs.biochem.5b00012

Table 1. Structural Refinement Statistics for the 39 nt Hairpin, 19 nt Duplex, and 11 nt Hairpin for the Average of 20 Structures of Each RNA Construct.

  39 nt hairpin 19 nt duplex 11 nt hairpin
no. of restraints      
all distance restraints, including hydrogen bonds 224 106 68
all NOE restraints 192 87 59
intraresidue 89 50 33
sequential residues 65 26 20
long range 38 11 6
hydrogen bond 32 19 9
dihedral restraints 176 93 24
rmsd of experimental restraints      
distances (Å) 6.4 × 10–4 6.0 × 10–4 7.7 × 10–4
dihedral angles (deg) 1.5 1.1 0.0
rmsd of structures for heavy atoms (Å)      
all residues (except 1 and 2 in the 39-mer) 2.90 ± 0.57 1.23 ± 0.43 0.75 ± 0.21
internal loop (residues 10, 11, 31, and 32) 1.65 ± 0.28 0.62 ± 0.23
base triple (residues 16, 25, and 26) 1.14 ± 0.18
hairpin loop and AC pair (residues 18–23) 0.83 ± 0.16 0.67 ± 0.24
helix 12/30–15/27 (excluding C16-G25 and C17-G24 base pairs) 0.47 ± 0.13 0.39 ± 0.20