CG base pair recognition within DNA triple helices by modified N-methylpyrrolo-dC nucleosides
作者:Simon R. Gerrard、Mastoura M. Edrees、Imenne Bouamaied、Keith R. Fox、Tom Brown
DOI:10.1039/c0ob00119h
日期:——
3-Aminophenyl-modified analogues of the bicyclic nucleoside N-methyl-3H-pyrrolo[2,3-d]pyrimidin-2(7H)-one were synthesised and incorporated directly into triplex-forming oligonucleotides in order to utilise their extended hydrogen bonding motif for recognition of the CG base pair. All analogues demonstrated strong binding affinity and very good selectivity for CG from pH 6.2 to 7.0; a marked improvement on previous modifications.
ARTIFICIAL NUCLEIC ACID, PRODUCTION METHOD THEREFOR, AND USE THEREOF
申请人:SYSMEX CORPORATION
公开号:US20220089634A1
公开(公告)日:2022-03-24
Disclosed is a compound represented by formula (1) or a salt thereof:
(wherein:
“Base” represents an aromatic heterocyclic group which may have a substituent or an aromatic hydrocarbon ring group which may have a substituent;
A
1
represents a linear alkylene group;
A
2
represents a single bond or an alkylene group;
X represents an alkylene group, —O— or —S(═O)
k
—;
R
1
and R
2
are the same as or different from each other and independently represent a hydrogen atom, etc.; and
R
3
represents an amino group which may have a substituent).
The present invention relates to novel nuclease-resistant oligomeric compounds and to novel methods for increasing the nuclease resistance of oligomeric compounds. In preferred embodiments of the invention, the oligomeric compounds comprise at least one modified nucleoside containing a modified sugar moiety at either the 3′ or 5′ terminus of the oligomeric compound, and further comprise at least one internucleoside linking group that is other than phosphodiester. Other preferred embodiments of the invention include methods of enhancing the nuclease resistance of oligomeric compounds comprising incorporating at least one modified nucleoside containing a modified sugar moiety at either the 3′ or 5′ terminus of an oligomeric compound.
Oligonucleotide-folate conjugates are described wherein folates are conjugated to one or more sites on an oligonucleotide including the 2′-, 3′-, 5′-, nucleobase and internucleotide linkage sites. The folate can be attached via the &agr;- or &ggr;-carboxylate, optionally through a linking group. Methods for the regiospecific synthesis of the conjugates are diclosed. Also disclosed are nucleosidic and non-nucleosidic linkers conjugated to folic acid and related folates.
System for delivering therapeutic agents into living cells and cells nuclei
申请人:Segev David
公开号:US20060160763A1
公开(公告)日:2006-07-20
A novel class of oligomeric compounds designed for forming conjugates with biologically active substances and delivering these substances to a desired bodily target are disclosed. Novel conjugates of these oligomeric compounds and biologically active moieties, pharmaceutical compositions containing such conjugates, and uses thereof as delivery systems for delivering the biologically active substances to a desired target are further disclosed. Processes of preparing the conjugates and the oligomeric compounds and novel intermediates designed for and used in these processes are also disclosed.