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The Sec16 homologue in Trypanosoma brucei has been identified and characterized. TbSec16 colocalizes with COPII components at the single endoplasmic reticulum exit site (ERES), which is next to the single Golgi stack in the insect (procyclic) form of this organism. Depletion of TbSec16 reduces the size of the ERES and the Golgi, and slows growth and transport of a secretory marker to the cell surface;...
The mechanism of transport through the Golgi is still controversial, and this has led to a search for model organisms that might provide new insights. One such is the protozoan parasite, Trypanosoma brucei, which has a single Golgi whose major cargo is the GPI-anchored coat proteins that decorate the cell surface and protect the organism against immune attack through a shedding mechanism. Using published...
The Sec24 subunit of the coat protein complex II (COPII) has been implicated in selecting newly synthesized cargo from the endoplasmic reticulum (ER) for delivery to the Golgi. The protozoan parasite, Trypanosoma brucei, contains two paralogs, TbSec24.1 and TbSec24.2, which were depleted using RNA interference in the insect form of the parasite. Depletion of either TbSec24.1 or TbSec24.2 resulted...
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