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A TETRAMERIC DNA STRUCTURE WITH PROTONATED CYTOSINE:CYTOSINE BASE PAIRS
SOLUTION NMR
NMR Refinement
Method
Details
Software
MOLECULAR DYNAMICS, ENERGY MINIMIZATION
STRUCTURE CALCULATION: MOLECULAR DYNAMICS AND ENERGY MINIMIZATION USING X-PLOR CONSTRAINTS (PER STRAND): TOTAL 70 DISTANCE CONSTRAINTS (ABOUT 12/NUCLEOTIDE) 43 FROM INTRANUCLEOTIDE NOES 6 FROM SEQUENTIAL INTERNUCLEOTIDE NOES 21 FROM NON-SEQUENTIAL INTERNUCLEOTIDE NOES 15 FROM HYDROGEN BONDS DIHEDRAL ANGLE CONSTRAINTS 10 BACKBONE AND SUGAR RING TORSION ANGLES CONSTRAINTS TO MAKE CYTOSINE BASE PAIRS PLANAR 4-FOLD SYMMETRY CONSTRAINTS (AS 3 SETS OF PAIRWISE NON-CRYSTALLOGRAPHIC SYMMETRY CONSTRAINTS)
X-PLOR
NMR Ensemble Information
Conformer Selection Criteria
Conformers Calculated Total Number
Conformers Submitted Total Number
1
Additional NMR Experimental Information
Details
DATA COLLECTION PARAMETERS: FREQUENCY: 600 MHZ FOR 1H, 242 MHZ FOR 31P SAMPLE TUBE: 5 MM, 7.5 MILLIMOLAR STRAND, PH 4.3, 25 C SPECTRA FOR ASSIGNMENTS: HOMONUCLEAR PROTON 2D, 1H-31P TOCSY; SPECTRA FOR CONSTRAINTS: NOESY, DQF-COSY, 1H-31P COSY