Crystal Structure of statistically disordered 19mer duplex p(CGG)3C(CUG)3
Structural dynamics of double-helical RNAs composed of CUG/CUG- and CUG/CGG-repeats.
1.9 mM ammonium sulfate, 5% isopropanol, pH 6.2, VAPOR DIFFUSION, HANGING DROP, temperature 291K
IN THE CRYSTAL, RNA 19-MER P(CGG)3C(CUG)3 PACKS IN A PSEUDO-CONTINUOUS DOUBLE HELIX WITH A 4-BASE ASYMMETRIC UNIT. TO BEST REPRESENT THE ARRANGEMENT OF THE BASES, THE RNA HAS BEEN MODELED AS TWO OVERLAPPING (WITH THE APPLICATION OF CRYSTAL SYMMETRY) SELF-COMPLEMENTARY TETRAMER DUPLEXES WITH OCCUPANCY 0.5.
HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
THE BIOLOGICAL ASSEMBLY IS A 19-MER RNA DUPLEX. DUE TO STATISTICAL DISORDER WITHIN THE CRYSTAL, REMARK 350 REPRESENTS THE ASYMMETRIC UNIT.
siRNA, trinucleotide repeat expansion, RNA