Related Experiment Video
Updated: Aug 19, 2026

Biotinylated Cell-penetrating Peptides to Study Intracellular Protein-protein Interactions
Published on: December 20, 2017
Characterization of two non-testis-specific CABYR variants that bind to GSK3beta with a proline-rich extensin-like
Hui-Chun Hsu1, Yun-Lin Lee, Tai-Shan Cheng
1Graduate Institute of Biochemistry, Kaohsiung Medical University, Taiwan, ROC.
Abstract:
To explore more possible roles for GSK3beta function, the yeast two-hybrid screening using GSK3beta as a bait protein was performed. In this study, we demonstrated that two variants of CABYR (281 and 379) interacted with GSK3beta in the yeast two-hybrid and GST pull down assay. Molecular characterization showed that CABYR variants formed a dimer with a proline-rich extensin-like domain, which slightly overlapped with GSK3beta-binding site. In kinase assay, we also showed that CABYR variants act as an ideal substrate for GSK3beta within the extensin-like domain and phosphorylation sites on CABYR were mapped. Interestingly, Northern blot showed that CABYR transcripts were expressed more distinctly in the fetal brain than in the adult brain, suggesting that this protein may play a role during brain development. Moreover, differential expression of CABYR variants may exhibit aberrant expression in brain tumors and cancer cell lines.
Related Concept Videos
Catenins
Catenins in Cell Junctions
Catenins bind to cell adhesion molecules such as cadherins and link them to different cytoskeletal proteins depending on the type of cell junction. At the adherens...
Assembly of Signaling Complexes
Interaction domains in cell signaling
Interaction domains recognize exposed features of their binding partners containing post-translationally modified sequences,...
Cytoskeletal Linker Proteins - Plakins
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...
Histone Variants at the Centromere
Activation and Inactivation of G Proteins

