Rather than relying on intrinsic intracellular targeting information, the key phototransduction enzyme guanylate cyclase 1 is delivered to the photosensory cilium with the visual pigment rhodopsin.
The ciliary G-protein Arl13B – which is often mutated in Joubert syndrome – is the Guanine nucleotide exchange factor for the G-protein Arl3 and exclusively localizes to cilia.
During cilium-generated signaling, ciliary membrane protein trafficking is unidirectional and ciliary membrane protein composition is regulated through action in the cytoplasm of the retrograde intraflagelllar transport (IFT) motor and shedding of ciliary ectosomes.
An endoplasmic reticulum membrane protein regulates synaptic transmission, alcohol sensitivity, and gene expression by controlling the trafficking of a calcium-activated potassium channel.
Dendritic cell recognition and processing of antigens from dead cells, utilising the Clec9A-damage recognition receptor, is controlled by a novel RNF41-ubiquitin-mediated regulatory pathway.