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Related Concept Videos

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Proteins are involved in several cellular processes and biochemical reactions. Analyzing a specific protein of interest requires it to be isolated from the other proteins in the cell. This is achieved by overexpressing the specific gene in a suitable host to produce large quantities of the target protein. A tag or label is recombined with the gene to produce a fusion protein containing the target protein and the tag. The tags on these fusion proteins can then be used for easy detection and...
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Updated: May 11, 2025

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Programmable C-to-U editing to track endogenous proteins.

Min Hao1, Tao Liu1

  • 1State Key Laboratory of Natural and Biomimetic Drugs, Chemical Biology Center, Department of Molecular and Cellular Pharmacology, Pharmaceutical Sciences, Peking University, Beijing, P.R. China.

Methods in Enzymology
|April 18, 2025
PubMed
Summary

Researchers developed a new method for labeling proteins inside living cells. This RNA Editing mediated ncAAs Protein Tagging (RENAPT) system allows precise tracking of endogenous proteins, aiding in the study of their functions.

Keywords:
Endogenous proteinNon-canonical amino acidsProgrammable C to U EditingProtein tagging

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Protein labeling is crucial for understanding protein localization, structure, and function.
  • Labeling endogenous proteins in live cells under native conditions remains a significant challenge.

Purpose of the Study:

  • To present a universal method for site-specific labeling of endogenous proteins in living cells.
  • To enable real-time tracking and functional studies of diverse proteins using minimal tags.

Main Methods:

  • Combining programmable cytidine to uridine (C-to-U) RNA editing with non-canonical amino acids (ncAAs).
  • Developing the RNA Editing mediated ncAAs Protein Tagging (RENAPT) system.
  • Integrating ncAAs into target endogenous proteins at specific sites within living cells.

Main Results:

  • Successful site-specific labeling of a diverse range of endogenous proteins.
  • Demonstrated real-time tracking capabilities of labeled proteins.
  • Validated the system's applicability in live-cell imaging and functional studies.

Conclusions:

  • RENAPT offers a versatile platform for endogenous protein tagging in live cells.
  • This technique facilitates in-depth investigations into protein localization and cellular functions.
  • The approach overcomes limitations of existing protein labeling methods in native cellular environments.