Related Experiment Video
Updated: Jun 1, 2026

Bimolecular Fluorescence Complementation
Published on: April 15, 2011
Biochemical mapping of interactions within the intraflagellar transport (IFT) B core complex: IFT52 binds directly to
Michael Taschner1, Sagar Bhogaraju, Melanie Vetter
1Department of Structural Cell Biology, Max Planck Institute of Biochemistry, Am Klopferspitz 18, D-82152 Martinsried, Germany.
Abstract:
Cilia and flagella are complex structures emanating from the surface of most eukaroytic cells and serve important functions including motility, signaling, and sensory reception. A process called intraflagellar transport (IFT) is of central importance to ciliary assembly and maintenance. The IFT complex is required for this transport and consists of two distinct multisubunit subcomplexes, IFT-A and IFT-B. Despite the importance of the IFT complex, little is known about its overall architecture. This paper presents a biochemical dissection of the molecular interactions within the IFT-B core complex. Two stable subcomplexes consisting of IFT88/70/52/46 and IFT81/74/27/25 were recombinantly co-expressed and purified. We identify a novel interaction between IFT70/52 and map the interaction domains between IFT52 and the other subunits within the IFT88/70/52/46 complex. Additionally, we show that IFT52 binds directly to the IFT81/74/27/25 complex, indicating that it could mediate the interaction between the two subcomplexes. Our data lead to an improved architectural map for the IFT-B core complex with new interactions as well as domain resolution mapping for several subunits.
Related Concept Videos
Microtubules in Cell Motility
Protein Complexes with Interchangeable Parts
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
Protein Complexes with Interchangeable Parts
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order to...
Fimbriae, Pili, and Axial Filaments
The Structure of Intermediate Filaments
Intermediate filaments...
Microtubule Associated Motor Proteins

