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Updated: Feb 4, 2026
06:43
In Vivo Proximity Biotinylation for Protein Interaction Studies in Paramecium tetraurelia
Published on: September 12, 2025
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Mapping Trypanosoma Protein Interactome by Proximity-Dependent Biotinylation.
Chethan K Krishna1, Ralf Erdmann1, Vishal C Kalel2
1Department of Systems Biochemistry, Institute of Biochemistry and Pathobiochemistry, Faculty of Medicine, Ruhr University Bochum, Bochum, Germany.
Methods in Molecular Biology (Clifton, N.J.)
|February 2, 2026
Summary
We used TurboID proximity labeling to map protein interactions for Trypanosoma brucei PEX19, an essential protein. This study identifies potential drug targets for combating parasitic infections.
Area of Science:
- Cell biology
- Biochemistry
- Parasitology
Background:
- Protein-protein interactions (PPIs) are crucial for cellular functions.
- Proximity labeling techniques like BioID and TurboID enable mapping of PPIs in living cells.
- TurboID is an efficient biotin ligase for identifying protein interactomes.
Purpose of the Study:
- To identify the interactome of Trypanosoma brucei PEX19, an essential cytosolic protein.
- To explore PPIs involving PEX19 for potential antiparasitic drug target discovery.
- To demonstrate the utility of TurboID for interactome mapping in parasitic organisms.
Main Methods:
- Fusion of TurboID to Trypanosoma brucei PEX19.
- Proximity-dependent biotinylation of interacting proteins in living cells.
- Streptavidin bead enrichment and proteomic analysis to identify biotinylated proteins.
Main Results:
- Successfully identified proteins in proximity to PEX19 using TurboID labeling.
- Generated a comprehensive interactome map for PEX19.
- Provided insights into the functional network of PEX19 in Trypanosoma brucei.
Conclusions:
- TurboID is effective for mapping interactomes of essential proteins in parasites.
- The identified PEX19 interactome offers potential targets for novel antiparasitic drugs.
- This proximity labeling approach is broadly applicable to various organisms.
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