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Vesicular transport to the primary cilium: basic principles

The membrane of the primary cilium 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? This question of vesicular targeting to the cilium has recently been illuminated by our discovery of two key factors, the BBSome and Rab8. The BBSome is a complex of 7 proteins encoded by genes defective in Bardet-Biedl Syndrome (BBS), an disease of the cilium.

Regulated transport to the primary cilium

Discovery of novel ciliary signaling pathways

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