Synthesis and Evaluation of RNA Transesterification Efficiency Using Stereospecific Serinol-Terpyridine Conjugates
摘要:
Six novel artificial ribonucleases were synthesized employing a stereochemically pure abasic serinol backbone residue for attachment of the RNA transesterification agent copper(II) terpyridine. These stereochemically pure abasic residues were synthesized as phosphoramidite building blocks from the parent L-serine and D-serine starting building blocks and incorporated into oligonucleotides via solid-phase DNA synthesis. These artificial ribonucleases were constructed to determine if the stereochemistry of the alpha carbon of an abasic serinol residue has influence over RNA transesterification through selective placement of a pendant transesterification agent in either the major or minor groove. The novel artificial ribonucleases and previously synthesized artificial ribonucleases were challenged with a 28-mer and 159-mer RNA substrate. It was determined that the stereochemistry of the carbon atom derived from the a-carbon of serine did not influence the extent of cleavage in these studies using copper(II) terpyridine conjugated artificial ribonucleases.
[EN] siRNAs WITH AT LEAST TWO LIGANDS AT DIFFERENT ENDS<br/>[FR] ARNSI POSSÉDANT AU MOINS DEUX LIGANDS À DEUX EXTRÉMITÉS DISTINCTES
申请人:SILENCE THERAPEUTICS GMBH
公开号:WO2019193189A1
公开(公告)日:2019-10-10
There is provided inter alia a conjugate for inhibiting expression of a target gene in a cell, said conjugate comprising a nucleic acid portion and ligand portions, said nucleic acid portion comprising at least one duplex region that comprises at least a portion of a first RNA strand and at least a portion of a second RNA strand that is at least partially complementary to the first strand, wherein said first strand is at least partially complementary to at least a portion of RNA transcribed from said target gene, said ligand portions comprising a linker moiety and a targeting ligand for in vivo targeting of cells and being conjugated exclusively to the 3' and/or 5' ends of one or both RNA strands, wherein the 5' end of the first RNA strand is not conjugated, wherein: (i) the second RNA strand is conjugated at the 5' end to the targeting ligand, and wherein (a) the second RNA strand is also conjugated at the 3' end to the targeting ligand and the 3' end of the first RNA strand is not conjugated; or (b) the first RNA strand is conjugated at the 3' end to the targeting ligand and the 3' end of the second RNA strand is not conjugated; or (c) both the second RNA strand and the first RNA strand are also conjugated at the 3' ends to the targeting ligand; or (ii) both the second RNA strand and the first RNA strand are conjugated at the 3' ends to the targeting ligand and the 5' end of the second RNA strand is not conjugated.
Probes comprising fluorescent artificial nucleobases and use thereof for detection of single base alteration
申请人:Seitz Oliver
公开号:US09206218B2
公开(公告)日:2015-12-08
The present invention relates to forced intercalation probes (FIT-probes) comprising at least one nucleoside analog which comprises at least a fluorescent artificial nucleobase directly bound to a carbon of a modified sugar moiety wherein said modified sugar moiety is a carba-sugar or an amino acid nucleic acid (AANA). Thereby the nucleoside analog is incorporated into DNA or RNA in the place of a single native base.
Mimicking the masters: An artificial nucleicacid, serinolnucleicacid (SNA), formed oligomers in which natural nucleobases were tethered through its 2‐amino‐1,3‐propanediol (serinol) scaffold. These SNAoligomers have two unique properties: their chirality is controllable by sequencedesign and can be inverted by reversing the sequence (see picture), and they can cross‐hybridize with DNA and RNA
Designed thiazole orange nucleotides for the synthesis of single labelled oligonucleotides that fluoresce upon matched hybridization
作者:Lucas Bethge、Ishwar Singh、Oliver Seitz
DOI:10.1039/c000697a
日期:——
However, most previously reported dye–DNA conjugates showed only little if any difference between the fluorescence of the single and the doublestranded state. Here, we introduce a TO-containing acyclic nucleotide, which is coupled during automated oligonucleotidesynthesis and provides for the desired fluorescence-up properties. The study reveals the conjugation mode as the most important issue. We show
[EN] NUCLEIC ACIDS FOR INHIBITING EXPRESSION OF PROS1 IN A CELL<br/>[FR] ACIDES NUCLÉIQUES POUR INHIBER L'EXPRESSION DE PROS1 DANS UNE CELLULE
申请人:UNIV BERN
公开号:WO2020225301A1
公开(公告)日:2020-11-12
The invention relates to nucleic acid products that interfere with PROS1 gene expression or inhibit its expression. The nucleic acids are particularly for use in the treatment, prevention or reduction of risk of suffering from a bleeding disorder.