COPI acts in both vesicular and tubular transport
Open Access
- 3 July 2011
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature
- Vol. 13 (8), 996-1003
- https://doi.org/10.1038/ncb2273
Abstract
Hsu and colleagues show that COPI-coated buds are a common progenitor for both vesicles and tubules. The choice between these two carriers is mediated by the opposing activities of the acyltransferase LPAAT-γ and the phospholipase cPLA2-α. Intracellular transport occurs through two general types of carrier, either vesicles1,2 or tubules3,4. Coat proteins act as the core machinery that initiates vesicle formation1,2, but the counterpart that initiates tubule formation has been unclear. Here, we find that the coat protein I (COPI) complex initially drives the formation of Golgi buds. Subsequently, a set of opposing lipid enzymatic activities determines whether these buds become vesicles or tubules. Lysophosphatidic acid acyltransferase-γ (LPAATγ) promotes COPI vesicle fission for retrograde vesicular transport. In contrast, cytosolic phospholipase A2-α (cPLA2α) inhibits this fission event to induce COPI tubules, which act in anterograde intra-Golgi transport and Golgi ribbon formation. These findings not only advance a molecular understanding of how COPI vesicle fission is achieved, but also provide insight into how COPI acts in intra-Golgi transport and reveal an unexpected mechanistic relationship between vesicular and tubular transport.This publication has 36 references indexed in Scilit:
- The phospholipase D1 pathway modulates macroautophagyNature Communications, 2010
- Journeys through the Golgi—taking stock in a new eraThe Journal of cell biology, 2009
- Mycobacterial Esx-3 is required for mycobactin-mediated iron acquisitionProceedings of the National Academy of Sciences of the United States of America, 2009
- Lysophosphatidic acid acyltransferase 3 regulates Golgi complex structure and functionThe Journal of cell biology, 2009
- Early Stages of Golgi Vesicle and Tubule Formation Require DiacylglycerolMolecular Biology of the Cell, 2009
- A role for phosphatidic acid in COPI vesicle fission yields insights into Golgi maintenanceNature, 2008
- Exiting the Golgi complexNature Reviews Molecular Cell Biology, 2008
- CtBP3/BARS drives membrane fission in dynamin-independent transport pathwaysNature, 2005
- Disruptions in Golgi structure and membrane traffic in a conditional lethal mammalian cell mutant are corrected by epsilon-COP.The Journal of cell biology, 1994
- 'Coatomer': a cytosolic protein complex containing subunits of non-clathrin-coated Golgi transport vesiclesNature, 1991