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Updated: May 5, 2026
08:25
Retrograde Tracing of Drosophila Embryonic Motor Neurons Using Lipophilic Fluorescent Dyes
Published on: January 12, 2020
5.8K
SNAP-tagging the retrograde route
Ludger Johannes1, Massiullah Shafaq-Zadah
1Institut Curie-Centre de Recherche, Trafic, Signaling and Delivery group, Paris Cedex 05, France.
Methods in Cell Biology
|December 4, 2013
Summary
This study introduces a chemical biology method to identify retrograde transport proteins. It tags plasma membrane proteins and captures those reaching the Golgi apparatus for mass spectrometry analysis.
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- Retrograde transport is crucial for protein trafficking from the plasma membrane to the Golgi apparatus.
- Identifying specific retrograde cargo proteins remains a challenge in cell biology.
Purpose of the Study:
- To develop and present a novel chemical biology strategy for identifying proteins undergoing retrograde transport.
- To provide a detailed protocol for capturing and identifying retrograde cargo proteins.
Main Methods:
- Covalent tagging of plasma membrane proteins with benzylguanine (BG).
- Utilizing the SNAP-tag, engineered into the trans-Golgi/TGN, to capture BG-tagged proteins.
- Immunopurification via GFP-Trap and subsequent mass spectrometry for protein identification.
Main Results:
- Demonstration of a functional chemical biology strategy for retrograde cargo identification.
- Successful capture and identification of proteins transported from the plasma membrane to the Golgi.
Conclusions:
- The developed method enables the systematic identification of retrograde transport proteins.
- This strategy offers a valuable tool for studying protein trafficking pathways.
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