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Updated: Feb 1, 2026
09:02
Split-BioID — Proteomic Analysis of Context-specific Protein Complexes in Their Native Cellular Environment
Published on: April 20, 2018
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2C-BioID: An Advanced Two Component BioID System for Precision Mapping of Protein Interactomes
Alexandre Chojnowski1, Radoslaw M Sobota2, Peh Fern Ong3
1Developmental and Regenerative Biology, Institute of Medical Biology, Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, #06-06 Immunos, Singapore 138648, Singapore.
Iscience
|December 1, 2018
Summary
We developed 2C-BioID, a new method for mapping protein-protein interactions (PPIs). This technique improves the accuracy and reliability of BioID analysis by enhancing specificity and reducing false positives.
Area of Science:
- Cellular Biology
- Biochemistry
- Molecular Biology
Background:
- Protein-protein interactions (PPIs) are crucial for cellular functions, development, and disease.
- BioID is a proximity-dependent biotinylation method for mapping PPIs.
- Conventional BioID involves fusing a biotin ligase to a protein of interest, which can lead to issues.
Purpose of the Study:
- To introduce and validate 2C-BioID, an advanced proximity-dependent biotinylation method.
- To compare the efficacy of 2C-BioID against conventional BioID in interactome analysis.
- To enhance the specificity and reliability of PPI mapping.
Main Methods:
- Developed 2C-BioID, a proximity-dependent biotinylation technique.
- Separated biotin ligase from the protein of interest until induced by a dimerizing agent.
- Compared interactomes of lamina-associated polypeptide 2β (LAP2β) with lamins A and C using both 2C-BioID and conventional BioID.
Main Results:
- 2C-BioID significantly enhanced data robustness and reliability.
- Facilitated in silico elimination of non-specific interactors.
- Overcame problems associated with aberrant protein localization, improving intracellular targeting.
Conclusions:
- 2C-BioID strengthens the specificity and reliability of BioID-based interactome analysis.
- Offers more stringent exclusion of false-positives compared to conventional BioID.
- Provides a more efficient method for intracellular targeting in PPI mapping.
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