Table 1.
Summary of experimental constraints and structure calculation statistics for ψ32-ACSLPhe
Constraint | |
---|---|
NOE distance constraints | |
Intraresiduea | 88 |
Interresidue | 150 |
Mean number per residue | 14.0 |
NOE constraints by category | |
Very strong (1.8–3.0 Å) | 7 |
Strong (1.8–4.0 Å) | 24 |
Medium (1.8–5.0 Å) | 70 |
Weak (1.8–6.0 Å) | 88 |
Very weak (1.8–7.0 Å) | 49 |
Base pair constraints | |
Totalb | 36 |
Dihedral angle constraints | |
Ribose ringc | 26 |
Backbone | 48 |
Mean number per residue | 4.3 |
Violations | |
Average distance constraints > 0.3Åd | 0 |
RMSDs for distance constraints (Å) | 0.027 |
Average dihedral constraints > 0.5e | 3.7 |
RMSDs for dihedral constraints (°) | 0.26 |
RMSD from ideal geometryf | |
Bonds (Å) | 0.006 |
Angles (°) | 1.4 |
aOnly conformationally restrictive constraints are included.
bThe number of base pair constraints includes U33•A37 base pair constraints.
cThree torsion angles within each ribose ring were used to constrain the ring to either the C2′-endo or C3′-endo conformation. The ring pucker of residues U33 and A37 were not constrained.
dA distance violation of 0.3 Å corresponds to 5.0 kcal energy penalty.
eA dihedral angle violation of 0.5° corresponds to 0.05 kcal energy penalty.
fCalculated for the minimized average structure.