RNA Base-Pairs, Stacking, etc.
Interactive basepair map with 3D fragment visualization for: 1TFY 
Base Pair Hydrogen Bonding Classification
Nucleic Acid Backbone Torsions
Base Pair Morphology Parameters
HOW CCA IS ADDED TO THE 3' END OF IMMATURE TRNA WITHOUT THE USE OF AN OLIGONUCLEOTIDE TEMPLATE
tRNA nucleotidyltransferase(E.C.2.7.7.25)/RNA Complex
A DOUBLE HELIX, OVERHANGING BASES
Click to show/hide 4 nucleic acid sequences
Click to show/hide 1 protein sequences
Xiong, Y., Steitz, T.A.
Mechanism of transfer RNA maturation by CCA-adding enzyme without using an oligonucleotide template. 
Nature, 430, pp. 640 - 645, 2004.
X-RAY DIFFRACTION
P 1 21 1
a = 114.092 b = 84.023 c = 134.561 (Ångstroms)
α = 90.0 β = 102.38 γ = 90.0 (degrees)
The structure was refined using the REFMAC program. The R value is 0.23801 for 38861 reflections in the resolution range 44.28 to 3.2 Ångstroms with Fobs > 0.0 sigma(Fobs) and with I > 0.0 sigma(I)
Asymmetric Unit coordinates (pdb format, Unix compressed(.gz))
Asymmetric Unit coordinates (cif format, Unix compressed(.gz))
Biological Assembly coordinates (pdb format) 1 2
Structure Factors (cif format)
Coordinates (pdb format, Unix compressed(.gz))
Coordinates (cif format, Unix compressed(.gz))
NMR Restraints (cif format, Unix compressed(.gz))
XML | Complete with coordinates (xml format, GNU compressed(.gz))