Modified Nucleoside Triphosphates for In-vitro Selection Techniques

Modified Nucleoside Triphosphates for In-vitro Selection Techniques

The development of SELEX (Selective Enhancement of Ligands by Exponential Enrichment) provides a powerful tool for the search of functional oligonucleotides with the ability to bind ligands with high affinity and selectivity (aptamers) and for the discovery of nucleic acid sequences with diverse enzymatic activities (ribozymes and DNAzymes). This technique has been extensively applied to the se...

Enzymatic synthesis of nucleoside diphosphates and triphosphates.

It has been recognized from recent studies that nucleoside triphosphates, other than ATP,’ function in biologic systems as phosphorylating agents (1) and in coenzyme synthesis (2) in a manner analogous to that of ATP. The discovery of the natural occurrence of a variety of purine and pyrimidine nucleoside diand triphosphates (3-5) and the likelihood that new biologic functions for these nucleot...

Nucleoside triphosphates--from synthesis to biochemical characterization.

The traditional strategy for the introduction of chemical functionalities is the use of solid-phase synthesis by appending suitably modified phosphoramidite precursors to the nascent chain. However, the conditions used during the synthesis and the restriction to rather short sequences hamper the applicability of this methodology. On the other hand, modified nucleoside triphosphates are activate...

Evidence for the presence of nucleoside tetraphosphates in commercial triphosphates.

Convenient synthesis of nucleoside 5'-triphosphates for RNA transcription.

By generating a selective phosphitylating reagent in situ, nucleoside 5'-triphosphates can be conveniently synthesized in one pot. This novel strategy without nucleoside protection has been developed to largely simplify synthesis of the nucleoside triphosphates. This demonstrated principle can be applied to the 5'-triphosphate synthesis of both native and modified nucleosides.