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Title: Iminodipropionic acid as the leaving group for DNA polymerization by HIV-1 reverse transcriptase
Authors: Song, Xiao-Ping
Bouillon, Camille
Lescrinier, Eveline
Herdewijn, Piet # ×
Issue Date: Aug-2011
Publisher: Wiley-VCH
Series Title: Chembiochem vol:12 issue:12 pages:1868-1879
Article number: 10.1002/cbic.201100160
Abstract: Previous studies have demonstrated that some selected amino monoacids and amino diacids can function as leaving groups in the polymerase-catalyzed incorporation of deoxynucleotides into DNA. Among these, the iminodiacetic acid phosphoramidate of deoxyadenosine monophosphate (IDA-dAMP) represents an interesting example, as it could overcome some of the problems observed when using L-aspartic acid as the leaving group, that is, poor chain elongation. We have now synthesized and evaluated a series of IDA-dAMP analogues that bear either an extended aliphatic chain in the amino acid function, or a phosphonic acid moiety (substituting for the carboxylic acid function). Among these compounds, the nucleotide with an iminodipropionic acid leaving group (IDP-dAMP) was identified as the best substrate; the excellent single incorporation (91 % conversion to a P+1 strand at 50 μM) was at a substrate concentration ten times lower than that used for IDA-dAMP). This nucleotide also presented improved kinetics and elongation capability compared to IDA-dAMP. The analogues with T, G, and C base moieties were also investigated for their incorporation ability with HIV-1 RT. The incorporation efficiency was found to decrease in the order A>T>G>C. The properties of the iminodipropionic acid as the leaving group surpass those of previously evaluated leaving groups; this acid will be a prime candidate for in vivo testing.
URI: 
ISSN: 1439-4227
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Medicinal Chemistry (Rega Institute)
× corresponding author
# (joint) last author

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