| Primary Identifier | IPR027684 | Type | Family |
| Short Name | TBCC |
| description | The tubulin heterodimer consists of one alpha- and one beta-tubulin polypeptide. In humans, five tubulin-specific chaperones termed TBCA/B/C/D/E are essential for bring the alpha- and beta-tubulin subunits together into a tightly associated heterodimer. Following the generation of quasi-native beta- and alpha-tubulin polypeptides (via multiple rounds of ATP-dependent interaction with the cytosolic chaperonin), TBCA and TBCB bind to and stabilise newly synthesised beta- and alpha-tubulin, respectively. The exchange of beta-tubulin between TBCA and TBCD, and of alpha-tubulin between TBCB and TBCE, resulting in the formation of TBCD/beta and TBCE/alpha. These two complexes then interact with each other and form a supercomplex (TBCE/alpha/TBCD/beta). Interaction of the supercomplex with TBCC causes the disassembly of the supercomplex and the release of E-site GDP-bound alpha/beta tubulin heterodimer, which becomes polymerization competent following spontaneous exchange with GTP [].This entry represents tubulin-specific chaperone C (TBCC, also known as tubulin-folding cofactor C), which is involved in the final step of the tubulin folding pathway [, ]. In Arabidopsis thaliana, it is required for continuous microtubule cytoskeleton organisation, mitotic division, cytokinesis, and to couple cell cycle progression to cell division in embryos and endosperms [, ]. |
