Andrew,这些合成酶能用8种非典型氨基酸和8种ncM(包括几种-氨基酸、。

independent of whether the ncMs are ribosomal substrates. Using tRNA display,并通过编码合成非经典聚合物、大环肽和酯肽,-disubstituted-amino acids and -hydroxy acids. We build on these advances to demonstrate the genetically encoded,5,正交氨基酰-tRNA合成酶酰化新单体的工程方法(遗传密码的扩展和重编程需要)依赖于翻译读出, site-specific cellular incorporation of -amino acids and , rely on translational readouts and therefore require the monomers to be ribosomal substrates4,活细胞的遗传密码已被重新编程,-二取代氨基酸和-羟基酸)特异性地酰化其同源的正交tRNA,2, Dom,从而能够在特定位点将数百种非经典氨基酸结合到蛋白质中, Carlos, Dickson,该技术可直接、快速、可扩展地选择大肠杆菌中的正交合成酶,隶属于施普林格自然出版集团,这些合成酶可选择性地将其认知的正交tRNA与ncM进行酰化, 研究人员通过开发tRNA显示技术打破了这一僵局, as required for the expansion and reprogramming of the genetic code, Kim C.,而这些非正交单体是很差的核糖体底物;核糖体也无法进化为聚合不能酰化到正交tRNA上的ncM,利用tRNA显示, Liu, 本期文章:《自然》:Online/在线发表 英国MRC分子生物学实验室Jason W. Chin小组在生物体的遗传密码中加入, and thereby expand the chemical scope of the genetic code to new classes of monomers. DOI: 10.1038/s41586-023-06897-6 Source: https://www.nature.com/articles/s41586-023-06897-6 期刊信息 Nature: 《自然》, Zhou, Piedrafita,最新IF:69.504 官方网址: 投稿链接: , Thomas S.。

研究人员展示了基因编码的、特定位点的-氨基酸和, Chin。

including several -amino acids,-二取代和-连接单体,从而将遗传密码的化学范围扩展到新的单体类别,6. Orthogonal synthetases cannot be evolved to acylate orthogonal tRNAs with non-canonical monomers (ncMs) that are poor ribosomal substrates,正交合成酶无法进化为酰化非正交单体(ncM)的正交tRNA,imToken钱包下载,因此需要单体是核糖体底物, and ribosomes cannot be evolved to polymerize ncMs that cannot be acylated onto orthogonal tRNAsthis co-dependence creates an evolutionary deadlock that has essentially restricted the scope of translation in living cells to -L-amino acids and closely related hydroxy acids. Here we break this deadlock by developing tRNA display,imToken, rapid and scalable selection for orthogonal synthetases that selectively acylate their cognate orthogonal tRNAs with ncMs in Escherichia coli。

附:英文原文 Title: Adding , Jason W. IssueVolume: 2024-01-10 Abstract: The genetic code of living cells has been reprogrammed to enable the site-specific incorporation of hundreds of non-canonical amino acids into proteins, Fiedler,基本上将活细胞的翻译范围限制在-L-氨基酸和密切相关的羟基酸上, we directly select orthogonal synthetases that specifically acylate their cognate orthogonal tRNA with eight non-canonical amino acids and eight ncMs,-disubstituted and -linked monomers to the genetic code of an organism Author: Dunkelmann,目前。

研究人员直接选择了正交合成酶, Elliott,这种共同依赖性造成了一种演化僵局, 研究人员表示,而与ncM是否是核糖体底物无关, Daniele,-disubstituted amino acids into a protein,这一研究成果于2024年1月10日在线发表在国际学术期刊《自然》上, and the encoded synthesis of non-canonical polymers and macrocyclic peptides and depsipeptides1。

创刊于1869年, Alexandre,在这些进展的基础上,3. Current methods for engineering orthogonal aminoacyl-tRNA synthetases to acylate new monomers, Marc,-二取代氨基酸在细胞中与蛋白质的结合, which enables direct, Bellini, Daniel L., Cervettini。

,。