219D

DNA/RNA HYBRID DUPLEX (5'-D(*GP*CP*TP*AP*TP*AP*APS*TP*GP*G)-3')(DOT) (5'-R(*CP*CP*AP*UP*UP*AP*UP*AP*GP*C)-3') WITH A PHOSPHOROTHIOATE MOIETY


SOLUTION NMR
NMR Refinement
MethodDetailsSoftware
molecular dynamicsNUMBER OF ATOMS USED IN REFINEMENT. NUMBER OF PROTEIN ATOMS 0 NUMBER OF NUCLEIC ACID ATOMS 411 NUMBER OF HETEROGEN ATOMS 0 NUMBER OF SOLVENT ATOMS 0AMBER4
NMR Ensemble Information
Conformer Selection Criteria
Conformers Calculated Total Number
Conformers Submitted Total Number1
Additional NMR Experimental Information
DetailsTHE PHOSPHATE BETWEEN NUCLEOTIDES SEVEN AND EIGHT IS MODIFIED BY SUBSTITUTING A SULFUR FOR ONE OF THE OXYGEN ATOMS. TWO SAMPLES WITH PURE CHIRALITY (R OR S) HAVE BEEN STUDIED; ONLY MINOR DIFFERENCES COULD BE DETECTED. THE COORDINATES REPRESENT THE S STEREOISOMER OF THE MODIFIED PHOSPHATE. THE SIXTH ROOT R-FACTOR, EXPRESSING THE FIT TO THE EXPERIMENTAL NOE DATA, CALCULATED WITH THE PROGRAM CORMA (KEEPERS AND JAMES), HAS A VALUE OF 0.074. THE ROOT MEAN SQUARE DEVIATION BETWEEN EXPERIMENTAL AND THEORETICAL DEOXYRIBOSE J-COUPLING CONSTRAINTS IS 2.01 HZ. THIS POOR FIT OF THE COUPLING CONSTANTS IS DUE TO CONFORMATIONAL FLEXIBILITY IN THE SUGAR RING.
Computation: NMR Software
#ClassificationVersionSoftware NameAuthor
1refinementAMBER4PEARLMAN,KOLLMAN