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Updated: May 19, 2026

Split-BioID — Proteomic Analysis of Context-specific Protein Complexes in Their Native Cellular Environment
Published on: April 20, 2018
Development of a split SNAP-tag protein complementation assay for visualization of protein-protein interactions in
Masayasu Mie1, Tatsuhiko Naoki, Kentaro Uchida
1Department of Biological Information, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Midori-ku, Yokohama, Japan.
Abstract:
A split SNAP-tag protein complementation assay was developed for visualization of protein-protein interactions in living cells. Split SNAP-tagμs, fragments of divided SNAP-tag between amino acid residues 91 and 92, were fused to proteins that can interact with each other. After incubation with a fluorescent SNAP-tag substrate, cells that expressed split SNAP-tag fusion proteins generated fluorescent signals when these proteins interacted. Moreover, by combination with the split CLIP-tag (SNAP-tag mutant), simultaneous labeling was achieved. This split SNAP-tag labeling method should be a useful tool for visualization of protein-protein interaction processes.
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