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• W1981012330 abstract "Podocalyxin (PC), the major sialoprotein of glomerular epithelial cells (GECs), helps maintain the characteristic architecture of the foot processes and the patency of the filtration slits. PC associates with actin via ezrin, a member of the ERM family of cytoskeletal linker proteins. Here we show that PC is linked to ezrin and the actin cytoskeleton via Na(+)/H(+)-exchanger regulatory factor 2 (NHERF2), a scaffold protein containing two PDZ (PSD-95/Dlg/ZO-1) domains and an ERM-binding region. The cytoplasmic tail of PC contains a C-terminal PDZ-binding motif (DTHL) that binds to the second PDZ domain of NHERF2 in yeast two-hybrid and in vitro pull-down assays. By immunocytochemistry NHERF2 colocalizes with PC and ezrin along the apical domain of the GEC plasma membrane. NHERF2 and ezrin form a multimeric complex with PC, as they coimmunoprecipitate with PC. The PC/NHERF2/ezrin complex interacts with the actin cytoskeleton, and this interaction is disrupted in GECs from puromycin aminonucleoside-, protamine sulfate-, or sialidase-treated rats, which show a dramatic loss of foot processes, comparable to that seen in the nephrotic syndrome. Thus NHERF2 appears to function as a scaffold protein linking PC to ezrin and the actin cytoskeleton. PC/NHERF2/ezrin/actin interactions are disrupted in pathologic conditions associated with changes in GEC foot processes, indicating their importance for maintaining the unique organization of this epithelium." @default.
• W1981012330 created "2016-06-24" @default.
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• W1981012330 creator A5041144191 @default.
• W1981012330 creator A5049439690 @default.
• W1981012330 date "2001-07-15" @default.
• W1981012330 modified "2023-10-11" @default.
• W1981012330 title "Loss of glomerular foot processes is associated with uncoupling of podocalyxin from the actin cytoskeleton" @default.
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• W1981012330 doi "https://doi.org/10.1172/jci12539" @default.
• W1981012330 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/203027" @default.
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