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M9610215.TXT
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1996-01-30
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Document 0215
DOCN M9610215
TI Design, biochemical, biophysical and biological properties of
cooperative antisense oligonucleotides.
DT 9601
AU Kandimalla ER; Manning A; Lathan C; Byrn RA; Agrawal S; Hybridon, Inc.,
Worcester, MA 01604, USA.
SO Nucleic Acids Res. 1995 Sep 11;23(17):3578-84. Unique Identifier :
AIDSLINE MED/96032854
AB Short oligonucleotides that can bind to adjacent sites on target mRNA
sequences are designed and evaluated for their binding affinity and
biological activity. Sequence-specific binding of short tandem
oligonucleotides is compared with a full-length single oligonucleotide
(21mer) that binds to the same target sequence. Two short
oligonucleotides that bind without a base separation between their
binding sites on the target bind cooperatively, while oligonucleotides
that have a one or two base separation between the binding
oligonucleotides do not. The binding affinity of the tandem
oligonucleotides is improved by extending the ends of the two
oligonucleotides with complementary sequences. These extended sequences
form a duplex stem when both oligonucleotides bind to the target,
resulting in a stable ternary complex. RNase H studies reveal that the
cooperative oligonucleotides bind to the target RNA with sequence
specificity. A short oligonucleotide (9mer) with one or two mismatches
does not bind at the intended site, while longer oligonucleotides
(21mers) with one or two mismatches still bind to the same site, as does
a perfectly matched 21mer, and evoke RNase H activity. HIV-1 inhibition
studies reveal an increase in activity of the cooperative
oligonucleotide combinations as the length of the dimerization domain
increases.
DE Antiviral Agents/*CHEMISTRY/PHARMACOLOGY Base Sequence Heat
HIV-1/*GENETICS Molecular Sequence Data Nucleic Acid Denaturation
Nucleic Acid Hybridization Oligonucleotides,
Antisense/*CHEMISTRY/PHARMACOLOGY Ribonuclease H, Calf
Thymus/METABOLISM RNA, Viral/CHEMISTRY Structure-Activity Relationship
Virus Replication/DRUG EFFECTS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).