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Golgin-97 Targets Ectopically Expressed Inward Rectifying Potassium Channel, Kir2.1, to the -Golgi Network in COS-7 Cells

Overview
Journal Front Physiol
Date 2018 Aug 21
PMID 30123141
Citations 10
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Abstract

The inward rectifying potassium channel, Kir2.1, is selected as cargo at the -Golgi network (TGN) for export to the cell surface through a unique signal-dependent interaction with the AP1 clathrin-adaptor, but it is unknown how the channel is targeted at earlier stages in the secretory pathway for traffic to the TGN. Here we explore a mechanism. A systematic screen of Golgi tethers identified Golgin-97 as a Kir2.1 binding partner. protein-interaction studies revealed the interaction is direct, occurring between the GRIP domain of Golgin-97 and the cytoplasmic domain of Kir2.1. Imaging and interaction studies in COS-7 cells suggest that Golgi-97 binds to the channel en route through the Golgi. RNA interference-mediated knockdown of Golgin-97 prevented exit of Kir2.1 from the Golgi. These observations identify Golgin-97 as a Kir2.1 binding partner that is required for targeting the channel to the TGN. Based on our studies in COS-7 cells, we propose Golgi-97 facilitates formation of AP1-dependent export carriers for Kir2.1 by coupling anterograde delivery of Kir2.1 with retrograde recycling of AP-1 containing endosomes to the TGN.

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References
1.
Lock J, Hammond L, Houghton F, Gleeson P, Stow J . E-cadherin transport from the trans-Golgi network in tubulovesicular carriers is selectively regulated by golgin-97. Traffic. 2005; 6(12):1142-56. DOI: 10.1111/j.1600-0854.2005.00349.x. View

2.
Gillingham A, Munro S . Finding the Golgi: Golgin Coiled-Coil Proteins Show the Way. Trends Cell Biol. 2016; 26(6):399-408. DOI: 10.1016/j.tcb.2016.02.005. View

3.
Lu L, Tai G, Hong W . Autoantigen Golgin-97, an effector of Arl1 GTPase, participates in traffic from the endosome to the trans-golgi network. Mol Biol Cell. 2004; 15(10):4426-43. PMC: 519138. DOI: 10.1091/mbc.e03-12-0872. View

4.
Hase K, Nakatsu F, Ohmae M, Sugihara K, Shioda N, Takahashi D . AP-1B-mediated protein sorting regulates polarity and proliferation of intestinal epithelial cells in mice. Gastroenterology. 2013; 145(3):625-35. DOI: 10.1053/j.gastro.2013.05.013. View

5.
Plaster N, Tawil R, Tristani-Firouzi M, Canun S, Bendahhou S, Tsunoda A . Mutations in Kir2.1 cause the developmental and episodic electrical phenotypes of Andersen's syndrome. Cell. 2001; 105(4):511-9. DOI: 10.1016/s0092-8674(01)00342-7. View