TBCEL (tubulin folding cofactor E-like) is a metazoan-specific regulator of tubulin stability that functions distinctly from its prokaryotic homologue TBCE. At the molecular level, TBCEL destabilizes tubulin heterodimers and targets them for proteasomal degradation, independent of direct microtubule interaction 12. This tubulin-disrupting activity is counterbalanced by Op18/stathmin, which protects unpolymerized tubulin from TBCEL-mediated degradation 3. Suppression of TBCEL expression increases cellular stable, post-translationally modified microtubules and alters organelle distribution 1. Neurologically, TBCEL plays a critical role in microtubule homeostasis during neuronal development. C. elegans coel-1 (TBCEL homologue) disruption causes developmental hypersensitivity to paclitaxel, while overexpression perturbs specialized microtubules in touch receptor neurons and influences neurite outgrowth and mechanosensory function 4. TBCEL also functions in spermatogenesis; Drosophila Tbcel mutants exhibit defective spermatid individualization and reduced male fertility, with TBCEL localized to testicular axoneme bundles 5. These findings establish TBCEL as a conserved regulator of microtubule dynamics with specialized roles in neuronal differentiation and male fertility, positioning it as a potential target in neurodevelopmental or reproductive disorders.