The orientation and dynamics of the C2'-OH and hydration of RNA and DNA.RNA hybrids.
The stereochemical and dynamic properties of the C2' hydroxyl group in several DNA.RNA hybrids have been measured by NMR and compared with the homologous RNA duplex. The C2'-OH NMR signals of the RNA strands were identified, and numerous specific assignments were made. The rate constants for exchange of the hydroxyl protons with water were determined at 5 degrees C, and were found to depend on both the position within a particular sequence and the nature of the duplex. On average, the exchang...Expand abstract
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