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Optical Control of a Neuronal Protein Using a Genetically Encoded Unnatural Amino Acid in Neurons

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Published on: March 28, 2016

Constructing Photoactivatable Protein with Genetically Encoded Photocaged Glutamic Acid.

Xiaochen Yang¹, Lei Zhao¹, Ying Wang²

¹State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.

Angewandte Chemie (International Ed. in English)

|August 16, 2023

Summary

This summary is machine-generated.

Researchers genetically incorporated photocaged glutamic acid (Glu) into cells, enabling the creation of new photoactivatable proteins. This advance expands the toolkit for designing light-controlled biological molecules.

Keywords:

Genetic Code Expansion Non-Canonical Amino Acid Photoactivation Photocaged Glutamate Protein Design Protein Engineering Protein Modifications

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Area of Science:

Biochemistry
Molecular Biology
Synthetic Biology

Background:

Genetic code expansion (GCE) allows creating photoactivatable proteins by replacing residues with photocaged analogues.
Current limitations exist due to a restricted set of photocaged amino acids available for GCE.

Purpose of the Study:

To genetically incorporate photocaged glutamic acid (Glu) analogues into proteins.
To demonstrate the utility of photocaged Glu in creating novel photoactivatable proteins.

Main Methods:

Utilized genetic code expansion (GCE) in both E. coli and mammalian cells.
Introduced photocaged glutamic acid analogues at specific protein sites.
Constructed photoactivatable variants of fluorescent proteins and SpyCatcher.

Main Results:

Successfully achieved genetic incorporation of photocaged Glu analogues in diverse cell types.
Demonstrated the generation of functional photoactivatable proteins using the new GCE strategy.
Showcased applications in creating light-switchable fluorescent proteins and SpyCatcher.

Conclusions:

Genetically encoded photocaged Glu significantly expands the available amino acid repertoire for GCE.
This method provides a powerful tool for designing and applying photoactivatable proteins.
Opens new avenues for controlling protein function with light in biological systems.