Characterization of the trafficking pathway of cystic fibrosis transmembrane conductance regulator in baby hamster kidney cells.
To examine the unknown trafficking pathway of the cystic fibrosis transmembrane conductance regulator (CFTR) from the endoplasmic reticulum (ER), we utilized baby hamster kidney cells stably expressing CFTR fused with green fluorescent protein. CFTR trafficking from the ER was visualized and analyzed by immunocytochemical analyses. Here we show that CFTR was exported from the ER to the cis-Golgi and early endosome, suggesting that CFTR transport in the early secretory pathway may utilize a non-conventional pathway. This CFTR trafficking pathway may be a target for pharmacological modulation that selectively stimulates CFTR transport.
Department of Molecular Medicine, Graduate School of Medical and Pharmaceutical Sciences, Kumamoto University, Kumamoto 862-0973, Japan.
Tsukasa
T
Okiyoneda
Kazutsune
K
Harada
Kaori
K
Yamahira
Ikuo
I
Wada
Yasuaki
Y
Hashimoto
Keiko
K
Ueno
Mary Ann
MA
Suico
Tsuyoshi
T
Shuto
Hirofumi
H
Kai
D000818:Animals; D002478:Cells, Cultured; D006224:Cricetinae; D019005:Cystic Fibrosis Transmembrane Conductance Regulator / Q000235:genetics / Q000378:metabolism*; D004721:Endoplasmic Reticulum / Q000378:metabolism; D011992:Endosomes / Q000378:metabolism; D006056:Golgi Apparatus / Q000378:metabolism; D049452:Green Fluorescent Proteins / Q000235:genetics; D007150:Immunohistochemistry; D007668:Kidney / Q000166:cytology; D018613:Microscopy, Confocal; D021381:Protein Transport; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism
D011993:Recombinant Fusion Proteins; D019005:Cystic Fibrosis Transmembrane Conductance Regulator; D049452:Green Fluorescent Proteins