Adding Amino Acids with Novel Reactivity to the Genetic Code of Saccharomyces Cerevisiae
摘要:
Using a novel genetic selection, we have identified a series of mutants of the E. coli tyrosyl-tRNA synthetase that selectively charge an amber suppressor tRNA with p-(propargyloxy)phenylalanine and p-azidophenylalanine in yeast. These evolved tRNA-synthetase pairs can be used to site-specifically label proteins with functional groups orthogonal to normal biological chemistries. As an example, we have shown that proteins containing these amino acids can be efficiently bioconjugated with small organic molecules by a [3 + 2] cycloaddition reaction that is mild enough for the manipulation of biological samples.
Bioconjugation by Copper(I)-Catalyzed Azide-Alkyne [3 + 2] Cycloaddition
摘要:
The copper-catalyzed cycloaddition reaction between azides and alkynes functions efficiently in aqueous solution in the presence of a tris(triazolyl)amine ligand. The process has been employed to make rapid and reliable covalent connections to micromolar concentrations of protein decorated with either of the reactive moieties. The chelating ligand plays a crucial role in stabilizing the Cu(I) oxidation state and protecting the protein from Cu(triazole)-induced denaturation. Because the azide and alkyne groups themselves are unreactive with protein residues or other biomolecules, their ligation is of potential utility as a general bioconjugation method.
Compositions and methods for coupling a plurality of compounds to a scaffold
申请人:The Scripps Research Institute
公开号:EP2452936A1
公开(公告)日:2012-05-16
Compositions and methods are provided for coupling a plurality of compounds to a scaffold. Compositions and methods are further provided for catalyzing a reaction between at least one terminal alkyne moiety and at least one azide moiety, wherein one moiety is attached to the compound and the other moiety is attached to the scaffold, forming at least one triazole thereby.
Virus–glycopolymer conjugates by copper(i) catalysis of atom transfer radical polymerization and azide–alkyne cycloaddition
作者:Sayam Sen Gupta、Krishnaswami S. Raja、Eiton Kaltgrad、Erica Strable、M. G. Finn
DOI:10.1039/b502444g
日期:——
The CuI-catalyzed ATRP and azideâalkyne cycloaddition reactions together provide a versatile method for the synthesis of end-functionalized glycopolymers and their attachment to a suitably modified viral protein scaffold.
CuI 催化的 ATRP 反应和叠氮烷烃环加成反应为合成末端官能化的糖聚合物并将其连接到适当修饰的病毒蛋白质支架上提供了一种多功能方法。
Expanding the eukaryotic genetic code
申请人:Chin W. Jason
公开号:US20050009049A1
公开(公告)日:2005-01-13
This invention provides compositions and methods for producing translational components that expand the number of genetically encoded amino acids in eukaryotic cells. The components include orthogonal tRNAs, orthogonal aminoacyl-tRNA synthetases, orthogonal pairs of tRNAs/synthetases and unnatural amino acids. Proteins and methods of producing proteins with unnatural amino acids in eukaryotic cells are also provided.
This invention provides compositions and methods for producing translational components that expand the number of genetically encoded amino acids in eukaryotic cells. The components include orthogonal tRNAs, orthogonal aminoacyl-tRNA synthetases, orthogonal pairs of tRNAs/synthetases and unnatural amino acids. Proteins and methods of producing proteins with unnatural amino acids in eukaryotic cells are also provided.
This invention provides compositions and methods for producing translational components that expand the number of genetically encoded amino acids in eukaryotic cells. The components include orthogonal tRNAs, orthogonal aminoacyl-tRNA synthetases, orthogonal pairs of tRNAs/synthetases and unnatural amino acids. Proteins and methods of producing proteins with unnatural amino acids in eukaryotic cells are also provided.