Identification of aptamers against the DNA template for in vitro transcription of the HIV-1 TAR element.

Identification of aptamers against the DNA template for in vitro transcription of the HIV-1 TAR element.

Antisense Nucleic Acid Drug Dev. 1997 Aug;7(4):369-80. Unique Identifier : AIDSLINE MED/97448864
Boiziau C; Dausse E; Mishra R; Duconge F; Toulme JJ; INSERM U 386, IFR Pathologies Infectieuses, Universite Victor Segalen,; Bordeaux, France.

Abstract: We have extracted from a random population of about 10(9) oligodeoxynucleotides a series of 21-mers that are able to bind to a folded DNA 76-mer used as a template for in vitro transcription of the TAR element of the retrovirus HIV-1, by the T7 RNA polymerase. Five aptastrucs, that is, aptamers able to bind to the structure, out of 15 analyzed sequences, share the consensus motif 5'-PyGGG(TG)PyC, complementary in part to a weak double-stranded region of the target. (The parentheses indicate that either T or G is missing in one of these aptastrucs.) A dissociation constant of about 3 microM was evaluated by electrophoretic mobility shift assay for the winner sequence. Interactions between the aptastruc and the target sequences involve more than Watson-Crick base pairing of the consensus octamer. The binding is chemistry dependent. Phosphorothioate oligodeoxyribonucleotides and 2'-O-methyl oligoribonucleotides derived from the selected aptastrucs exhibit a weak if any affinity for the target.

Keywords: *HIV Long Terminal Repeat *HIV-1/GENETICS *Oligonucleotides, Antisense/PHARMACOLOGY *Transcription, Genetic/DRUG EFFECTS
980430
M9841778

ÆGIS is made possible through unrestricted grants from Boehringer Ingelheim, iMetrikus, Inc., John M. Lloyd Foundation, the National Library of Medicine, and donations from users like you. Always watch for outdated information. This article first appeared in 1998. This material is designed to support, not replace, the relationship that exists between you and your doctor.

ÆGiS presents published material, reprinted with permission and neither endorses nor opposes any material. All information contained on this website, including information relating to health conditions, products, and treatments, is for informational purposes only. It is often presented in summary or aggregate form. It is not meant to be a substitute for the advice provided by your own physician or other medical professionals. Always discuss treatment options with a doctor who specializes in treating HIV.

Copyright ©1980, 2003. AEGiS. All materials appearing on ÆGiS are protected by copyright as a collective work or compilation under U.S. copyright and other laws and are the property of ÆGiS, or the party credited as the provider of the content.