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© Institut Pasteur
Cristaux de cellulase, enzyme purifiée de Clostridium thermocellum permettant la digestion de la cellulose. Image colorisée.
Publication : Chembiochem : a European journal of chemical biology

A parallel synthesis scheme for generating libraries of DNA polymerase substrates and inhibitors

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Chembiochem : a European journal of chemical biology - 01 Dec 2002

Strobel H, Dugué L, Marlière P, Pochet S

Link to Pubmed [PMID] – 12465034

Chembiochem 2002 Dec;3(12):1251-6

We report a combinatorial approach aimed at producing in a single step a large family of nucleoside triphosphate derivatives that could be tested for their ability to be substrates for DNA polymerases. We propose as a unique triphosphate building block a nucleotide with a hydrazine function anchored to an imidazole ring. Condensation between the 5′-triphosphate derivative of 1-(2-deoxy-beta-D-erythro-pentofuranosyl)-imidazole-4-hydrazide (dY(NH(2))TP) and any aldehyde or ketone, followed by reduction of the intermediate hydrazones dXmTP, resulted in the corresponding hydrazides (dXnTP). Following this scheme, a series of aldehydes having various aromatic parts yielded a number of adducts dY(NHR)TP. Vent (exo-) DNA polymerase is found to be able to catalyse the single incorporation of these bulky triphosphate derivatives. Subsequent extensions of the modified pairs with canonical triphosphates resulted mainly in abortive elongations at primer+2, except after the incorporation of dY(NHben)TP and, to a lesser extent, dY(NHphe)TP opposite C. These results illustrate the potential of this parallel synthetic scheme for generating new substrates or inhibitors of replication in a single step.

http://www.ncbi.nlm.nih.gov/pubmed/12465034