Expanding and reprogramming the genetic code of cells and animals
- PMID: 24555827
- DOI: 10.1146/annurev-biochem-060713-035737
Expanding and reprogramming the genetic code of cells and animals
Abstract
Genetic code expansion and reprogramming enable the site-specific incorporation of diverse designer amino acids into proteins produced in cells and animals. Recent advances are enhancing the efficiency of unnatural amino acid incorporation by creating and evolving orthogonal ribosomes and manipulating the genome. Increasing the number of distinct amino acids that can be site-specifically encoded has been facilitated by the evolution of orthogonal quadruplet decoding ribosomes and the discovery of mutually orthogonal synthetase/tRNA pairs. Rapid progress in moving genetic code expansion from bacteria to eukaryotic cells and animals (C. elegans and D. melanogaster) and the incorporation of useful unnatural amino acids has been aided by the development and application of the pyrrolysyl-transfer RNA (tRNA) synthetase/tRNA pair for unnatural amino acid incorporation. Combining chemoselective reactions with encoded amino acids has facilitated the installation of posttranslational modifications, as well as rapid derivatization with diverse fluorophores for imaging.
Keywords: amino acid; aminoacyl-tRNA synthetase; bioorthogonal reaction; genetic code expansion; posttranslational modification; protein chemistry; protein labeling; ribosome; synthetic biology; tRNA.
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