Auxilin Depletion Causes Clathrin to Form Membraneless Cages
Author Information
Author(s): Jennifer Hirst, Daniela A Sahlender, Sam Li, Nienke B Lubben, Georg H H Borner, Margaret S Robinson
Primary Institution: Cambridge Institute for Medical Research, University of Cambridge
Hypothesis
HeLa cells express both auxilin 1 and auxilin 2, and their depletion will affect clathrin-mediated endocytosis and trafficking.
Conclusion
Depleting both auxilins leads to a significant reduction in clathrin-coated pits and the formation of membraneless clathrin cages.
Supporting Evidence
- Both auxilin 1 and auxilin 2 are required for normal clathrin-mediated endocytosis.
- Depletion of both auxilins resulted in a 50% reduction in clathrin-coated pits.
- Electron microscopy revealed that clathrin structures in auxilin-depleted cells were smaller and lacked membranes.
Takeaway
When scientists removed two proteins called auxilins from cells, the cells couldn't make the usual clathrin-coated bubbles and instead made strange, empty clathrin cages.
Methodology
The study used RNA interference to deplete auxilin 1 and auxilin 2 in HeLa cells and analyzed the effects on clathrin dynamics and endocytosis.
Limitations
The study primarily focuses on HeLa cells, which may not fully represent other cell types.
Digital Object Identifier (DOI)
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