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Vesicular transport to the primary cilium: basic principles

Cilium Anderson.jpg

The primary cilium is composed of a microtubule core enclosed within a membrane sheath, the ciliary membrane, that is continuous with the plasma membrane. Despite this continuity, ciliary and plasma membranes contain distinct complements of lipids and proteins, thus making the cilium a bona fide compartment exposed to the extracellular milieu. Consequently, the cilium has been compared to a "cellular antenna" that capture and transduces developmental signals to the inside of the cell. But how do relevant signaling receptors reach the ciliary membrane instead of the plasma membrane? We have recently discovered two factors involved in vesicular transport

Regulated transport to the primary cilium

Cilium Regulated.jpg

Discovery of novel ciliary signaling pathways

BBS Organs.jpg