title: Synthesis of oligonucleotide having a bent structure by incorporation of an interresidually cyclized uridylyl (3'-5')uridine unit.
abstract: The chemical synthesis and conformational properties of interresidually cyclized uridylyl(3'-5')uridine derivatives were studied in order to introduce a stable turn structure into oligonucleotides. These cyclized molecules were analogs of uridylyl(3'-5')5-[methylamino(methyl)]-uridine which is the component of the U turn structure of tRNAarg E. coli. The conformational properties of these cyclic dinucleoside monophosphates were studied using NMR and CD spectroscopy with the aid of molecular mechanics and molecular dynamics simulations. These experiments indicated that the turn conformation could be stabilized by introducing a cyclic structure as expected. On the basis of these results, the chemical synthesis of phosphoramidite units of these cyclic dinucleoside monophosphate derivatives were studied to construct oligonucleotides having a stable bent structure.
authors.affiliation: Department of Life Science, Tokyo Institute of Technology, Yokomama, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Seio
authors.forename: T
authors.initials: T
authors.lastname: Wada
authors.forename: M
authors.initials: M
authors.lastname: Sekine
authors.forename: K
authors.initials: K
authors.lastname: Sakamoto
authors.forename: S
authors.initials: S
authors.lastname: Yokoyama
mesh_terms: D002942:Circular Dichroism; D003198:Computer Simulation; D015226:Dinucleoside Phosphates / Q000138:chemical synthesis / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009690:Nucleic Acid Conformation; D009712:Nucleotides, Cyclic / Q000138:chemical synthesis* / Q000737:chemistry; D009843:Oligoribonucleotides / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D015226:Dinucleoside Phosphates; D009712:Nucleotides, Cyclic; D009843:Oligoribonucleotides; C036198:bis(3'-5')cyclic diuridine monophosphate