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Optical Control of a Neuronal Protein Using a Genetically Encoded Unnatural Amino Acid in Neurons
Published on: March 28, 2016
A genetically encoded photocaged amino acid
Ning Wu1, Alexander Deiters, T Ashton Cropp
1Department of Chemistry and the Skaggs Institute for Chemical Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.
Journal of the American Chemical Society
|November 4, 2004
Summary
Researchers created a new tRNA/synthetase pair for yeast, enabling the insertion of specific amino acids into proteins using the TAG codon. This advances synthetic biology and protein engineering.
Area of Science:
- Biochemistry
- Molecular Biology
- Synthetic Biology
Background:
- Orthogonal tRNA/synthetase pairs are crucial tools for expanding the genetic code.
- Previous systems have limitations in yeast, necessitating new approaches for unnatural amino acid incorporation.
Purpose of the Study:
- To develop a second orthogonal transfer RNA (tRNA)/synthetase pair for use in yeast.
- To enable the site-specific insertion of unnatural amino acids into proteins in yeast.
Main Methods:
- Utilized the Escherichia coli tRNALeu/leucyl tRNA-synthetase pair as a basis for developing the new system.
- Employed a novel genetic selection to identify specific synthetase mutants.
- Tested the system with alpha-aminocaprylic acid and o-nitrobenzyl cysteine.
Main Results:
- Successfully developed a second orthogonal tRNA/synthetase pair functional in yeast.
- Identified synthetase mutants capable of selectively charging an amber suppressor tRNA.
- Demonstrated the insertion of alpha-aminocaprylic acid and o-nitrobenzyl cysteine into proteins at the TAG amber nonsense codon.
Conclusions:
- The developed tRNA/synthetase pair provides a new tool for incorporating unnatural amino acids into yeast proteins.
- This system expands the capabilities of genetic code expansion in eukaryotes.
- Facilitates advancements in protein engineering and synthetic biology applications.
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