FEBS Letters 1995-05-15

Relaxing the substrate specificity of an aminoacyl-tRNA synthetase allows in vitro and in vivo synthesis of proteins containing unnatural amino acids.

M Ibba, H Hennecke

文献索引：FEBS Lett. 364(3) , 272-5, (1995)

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摘要

It has previously been demonstrated that the unnatural amino acid p-Cl-phenylalanine can be attached to tRNA(Phe) by a modified phenylalanyl-tRNA synthetase with relaxed amino acid substrate specificity. We show that this modification to the translational machinery of Escherichia coli is the only requirement for the incorporation of either p-Cl- or p-Br-phenylalanine into full-length luciferase in vitro. The incorporation of p-Cl-phenylalanine was also demonstrated in vivo using a suitably modified host strain. These results represent the first description of the incorporation into a protein in vivo of an unnatural amino acid which is normally rejected by the cellular translational machinery.

相关化合物

  • DL-4-溴苯丙氨酸
  • L-4-溴苯丙氨酸

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