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Related Experiment Video

Updated: Sep 24, 2025

Cell-Type Specific Protein Purification and Identification from Complex Tissues Using a Mutant Methionine tRNA Synthetase Mouse Line
07:39

Cell-Type Specific Protein Purification and Identification from Complex Tissues Using a Mutant Methionine tRNA Synthetase Mouse Line

Published on: April 13, 2022

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Cell-type Specific Protein Purification and Identification from Complex Tissues using a Mutant Methionine tRNA

Belquis Nassim-Assir1, Daniel Ouro Corredera2, Rodrigo Alvarez-Pardo2

  • 1Max-Planck-Institute for Brain Research, Synaptic Plasticity Department.

Journal of Visualized Experiments : Jove
|May 2, 2022
PubMed
Summary

This study introduces a new method for in vivo protein labeling in specific cells using an engineered mouse model. This technique allows for the purification of newly synthesized proteins and detection of subtle proteomic changes.

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Related Experiment Videos

Last Updated: Sep 24, 2025

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Area of Science:

  • Proteomics
  • Molecular Biology
  • Cell Biology

Background:

  • Protein homeostasis is crucial for cellular function in health and disease.
  • Current methods for studying newly synthesized proteins in vivo have limitations.

Purpose of the Study:

  • To develop a novel in vivo method for labeling and purifying newly synthesized proteins in specific cell populations.
  • To enable the study of cell-type-specific proteomes and detect subtle changes.

Main Methods:

  • Utilized an engineered inducible mouse line expressing L274G-Methionine tRNA synthetase (MetRS*).
  • Incorporated azidonorleucine (ANL) into newly synthesized proteins via MetRS*.
  • Purified ANL-labeled proteins from specific cellular populations.

Main Results:

  • Successfully labeled and purified newly synthesized proteins in a cell-type-specific manner in vivo.
  • Demonstrated the ability to detect subtle changes in protein content by reducing sample complexity.

Conclusions:

  • The described protocol provides a powerful tool for investigating cell-type-specific protein synthesis and dynamics in vivo.
  • This method facilitates a deeper understanding of cellular mechanisms in both physiological and disease states.