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Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Proc+Natl+Acad+Sci+U+S+A 2017 ; 114 (13): 3433-8 Nephropedia Template TP
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Conserved role for Gga proteins in phosphatidylinositol 4-kinase localization to the trans-Golgi network #MMPMID28289207
Daboussi L; Costaguta G; Ghukasyan R; Payne GS
Proc Natl Acad Sci U S A 2017[Mar]; 114 (13): 3433-8 PMID28289207show ga
Clathrin-coated vesicles (ccv) are fundamental intracellular transport carriers in eukaryotic cells. Assembly of ccv at appropriate intracellular membrane sites requires membrane-associated factors, including phosphoinositide lipids that recruit clathrin adaptors to the membrane to initiate ccv formation. How levels of specific phosphoinositides are controlled at particular membranes is not well understood. At the trans-Golgi network (TGN), the key phosphoinositide is phosphatidylinositol 4-phosphate (PtdIns4P). Here we characterize molecular interactions between Gga (Golgi-localized, gamma-adaptin ear homology, Arf-binding) clathrin adaptors and a kinase responsible for PtdIns4P synthesis at the TGN in yeast and mammalian cells. Defects that reduce kinase binding to Gga proteins inhibit kinase recruitment to the TGN. These results identify an evolutionarily conserved role for Gga clathrin adaptors in controlling PtdIns4P synthesis at the TGN.