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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Addition of the keto functional group to the genetic code of Escherichia coli
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Addition of the keto functional group to the genetic code of Escherichia coli

机译:将酮官能团添加到大肠杆菌的遗传密码中

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摘要

Although the keto group is the most versatile of the functional groups in organic chemistry, it is absent in the genetically encoded amino acids. To overcome this natural limitation on protein biosynthesis, we have evolved an orthogonal tRNA-synthetase pair that makes possible the efficient incorporation of a keto amino acid, p-acetyl-L-phenylalanine, into proteins in E. coli with high translational fidelity in response to the amber nonsense codon. To demonstrate the utility of this keto amino acid, we have used it to modify a protein selectively with a small molecule fluorophore and biotin derivative. This additional genetically encoded amino acid should greatly expand our ability to manipulate protein structure and function both in vitro and in living cells. [References: 32]
机译:尽管酮基是有机化学中功能最广泛的官能团,但在基因编码的氨基酸中却不存在。为了克服这种对蛋白质生物合成的自然限制,我们开发了一种正交的tRNA合成酶对,该对使得能够将酮氨基酸对乙酰基-L-苯丙氨酸有效掺入大肠杆菌中的蛋白质中,具有很高的翻译保真度。琥珀色的废话密码子。为了证明该酮氨基酸的效用,我们已使用它通过小分子荧光团和生物素衍生物选择性修饰蛋白质。这种额外的遗传编码氨基酸将大大扩展我们在体外和活细胞中操纵蛋白质结构和功能的能力。 [参考:32]

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