TPPP3

Cilia effects upon perturbation of TPPP3

Loss-of-function effect:

Shorter cilia

Ciliogenesis screen results (2 screens)

• Wheway et al. 2015 (siRNA) [siRNA]: No effect PMID:26167766
• Breslow et al. 2018 (CRISPR) [CRISPR]: No Significant Effect PMID:29459680

Subcellular localization

cilia

Function

TPPP3 has located to motile cilia. We examined the underlying molecular mechanism of the ciliary membrane fusion by isolating the tracheal cilium. Liquid Chromatography-Mass Spectrometry (LC-MS) analysis as well as pharmacological analysis revealed that hyperaccumulation of a long chain ceramide at the ciliary membrane caused the membrane fusion. In addition, sensory cilia formation was impaired in the olfactory sensory neuron of the Tppp3 KO mice. Due to the lack of Tppp3, dendritic MT assembly that underlies long-range migration of BBs toward the cell surface was impaired. These findings demonstrate that Tppp3, as well as the defined intracellular MT architecture, regulate proper orientation/subcellular positioning of BBs and the independency of individual motile cilium membranes. (41325527)