[EN] PEPTIDE NUCLEIC ACID (PNA) MONOMERS WITH AN ORTHOGONALLY PROTECTED ESTER MOIETY [FR] MONOMÈRES D'ACIDE NUCLÉIQUE PEPTIDIQUE (ANP) AVEC UNE FRACTION ESTER À PROTECTION ORTHOGONALE
nucleic acids (PNAs) hybridize to natural oligonucleotides according to Watson and Crick base-pairing rules. The robustness of PNA oligomers and ease of synthesis have made them an attractive platform to encode small or macromolecules for microarraying purposes and other applications based on programmable self assembly. A cornerstone of these endeavors is the orthogonality of PNAsynthesis with other chemistries
Selection of a synthetic glycan oligomer from a library of DNA-templated fragments against DC-SIGN and inhibition of HIV gp120 binding to dendritic cells
作者:Mihai Ciobanu、Kuo-Ting Huang、Jean-Pierre Daguer、Sofia Barluenga、Olivier Chaloin、Evelyne Schaeffer、Christopher G. Mueller、Daniel A. Mitchell、Nicolas Winssinger
DOI:10.1039/c1cc13213j
日期:——
We report the synthesis of a nucleic acid-encoded carbohydrate library, its combinatorial self-assembly into 37 485 pairs and a screen against DC-SIGN leading to the identification of consensus ligand motifs. A prototypical example from the selected pairs was shown to have enhanced binding. A dendrimer incorporating the selected motifs inhibited gp120's binding to dendritic cells with higher efficiency than mannan.
Peptide nucleic acids (PNAs) are functional analogues of natural oligonucleotides. Herein, we report the synthesis of PNAs bearing a triazole in lieu of the amide bond assembled using a “click” cycloaddition, their hybridization properties as well as the DNA-templated coupling of the azide and alkyne PNA fragments.
hybridization has been utilized to generate a combinatorial library of structures that emulate the topologies of complex carbohydrates interacting with an antibody that shows broad‐spectrum activity against HIV. This simple method involves attaching oligosaccharides tagged with peptidenucleicacids onto DNA templates in a controlled manner (see schematic picture).
Microwave-assisted solid-phase synthesis of antisense acpP peptide nucleic acid-peptide conjugates active against colistin- and tigecycline-resistant E. coli and K. pneumoniae
作者:Anna Mette Hansen、Gitte Bonke、Wouter Frederik Johan Hogendorf、Fredrik Björkling、John Nielsen、Kenneth T. Kongstad、Dorota Zabicka、Magdalena Tomczak、Malgorzata Urbas、Peter E. Nielsen、Henrik Franzyk
DOI:10.1016/j.ejmech.2019.02.024
日期:2019.4
antisense PNA-peptide conjugates encouraged development of a fast and efficient synthesis protocol that facilitates structure-activity studies. The use of an Fmoc/Boc protection scheme for both PNA monomers and amino acid building blocks in combination with microwave-assisted solid-phase synthesis proved to be a convenientprocedure for continuous assembly of antisense PNA-peptide conjugates. A validated
有效的抗菌反义PNA-肽缀合物的最新发现促进了快速,有效的合成方案的发展,该方案促进了结构活性研究。结合微波辅助固相合成,对PNA单体和氨基酸构件使用Fmoc / Boc保护方案已被证明是反义PNA-肽共轭物连续组装的便捷方法。 将经过验证的反义PNA低聚物(CTCATACTCT;靶向acpP基因的mRNA )与N端修饰的drosocin(即RXR-PRPYSPRPTSHPRPIRV; X =氨基己酸)或截短的Pip1肽(即RXRRXR-IKILFQNRRMKWKK; X =氨基己酸),并确定所得缀合物的抗菌作用,从而可以评估不同接头的影响以及肽L型和D型之间的差异。 不含接头部分的德罗霉素衍生化合物对野生型大肠杆菌和肺炎克雷伯菌均表现出最高的抗菌活性(MIC在2-4μg/ mL〜0.3-0.7μM范围内),而类似物则显示乙二醇(例如1)部分或极性马来酰亚胺连接基也具有对野生型肺炎克雷伯菌的活性(MIC为4-8μg/