Lipoprotein receptors and a Disabled family cytoplasmic adaptor protein regulate EGL-17/FGF export in C. elegans

被引:34
作者
Kamikura, DM [1 ]
Cooper, JA [1 ]
机构
[1] Fred Hutchinson Canc Res Ctr, Seattle, WA 98109 USA
关键词
selective secretion; fibroblast growth factor; lipoprotein receptor traffic; Dab; cargo selection; endocytosis;
D O I
10.1101/gad.1136103
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Growth factors and morphogens need to be secreted to act on distant cells during development and in response to injury. Here, we report evidence that efficient export of a fibroblast growth factor (FGF), EGL-17, from the Caenorhabditis elegans developing vulva requires the lipoprotein receptor-related proteins Ce-LRP-1 and Ce-LRP-2 and a cytoplasmic adaptor protein, Ce-DAB-1 (Disabled). Lipoprotein receptors are transmembrane proteins best known for their roles in endocytosis. Ce-LRP-1 and Ce-LRP-2 possess a conserved intraluminal domain that can bind to EGL-17, as well as a cytosolic FXNPXY motif that can bind to Ce-DAB-1. Ce-DAB-1 contains signals that confer subcellular localization to Golgi-proximal vesicles. These results suggest a model in which Ce-DAB-1 coordinates selection of receptors and cargo, including EGL-17, for transport through the secretory pathway.
引用
收藏
页码:2798 / 2811
页数:14
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