High yield synthesis, purification and characterisation of the RNase L activators 5′-triphosphate 2′–5′-oligoadenylates
摘要:
Upon viral infection, double-stranded viral RNA is detected very early in the host cell by several cellular 2'-5' oligoadenylate synthetases, which synthesize 2'-5' adenylate oligonucleotides that activate the cellular RNase L, firing an early primary antiviral response through self and non-self RNA cleavage. Transfecting cells with synthetic 2'-5' adenylate oligonucleotides activate RNase L, and thus provide a useful shortcut to study the early steps of cellular and viral commitments into this pathway. Defined 2'-5' adenylate oligonucleotides can be produced in vitro, but their controlled synthesis, purification, and characterisation have not been reported in detail. Here, we report a method suitable to produce large amounts of 2-5As of defined lengths in vitro using porcine OAS1 (pOAS) and human OAS2 (hOAS). We have synthesized a broad spectrum of 2-5As at the milligram scale and report an HPLC-purification and characterisation protocol with quantified yield for 2-5A of various lengths. (C) 2010 Elsevier B.V. All rights reserved.
ARTIFICIAL NUCLEIC ACID MOLECULES FOR IMPROVED PROTEIN OR PEPTIDE EXPRESSION
申请人:CureVac GmbH
公开号:US20150218554A1
公开(公告)日:2015-08-06
The invention relates to an artificial nucleic acid molecule comprising at least one 5′UTR element which is derived from a TOP gene, at least one open reading frame, and preferably at least one histone stem-loop. Optionally the artificial nucleic acid molecule may further comprise, e.g. a poly(A)sequence, a poyladenylation signal, and/or a 3′UTR. The invention further relates to the use of such an artificial nucleic acid molecule in gene therapy and/or genetic vaccination.
We have synthesized the diastereomeric isomers of adenylyl(3'-5')adenylyl(3'-5')adenosine (ApApA), and investigated their helical structures and hybridization properties with D-poly(U) by circular dichroism (CD) and UV melting experiments. The configuration of the 5'-end residue of ApApA has little effect on the helical structure. The configuration of the 3'-end residue has little effect on the stability of the triplex, and the chiral modifications cause complicated effects on the helical structure of ApApA and its triplex-forming ability with D-poly(U), depending on the site of the modification. (c) 2005 Elsevier Ltd. All rights reserved.
On the mechanism of T4 RNA ligase
作者:F. R. Bryant、S. J. Benkovic
DOI:10.1021/ja00393a047
日期:1981.2
US20140273036A1
申请人:——
公开号:——
公开(公告)日:——
Nucleotide, XVII. Synthese von homogenen Adenosyl-3?,5?-Oligomeren nach dem Phosphotriester-Verfahren