期刊
TRENDS IN CELL BIOLOGY
卷 15, 期 4, 页码 222-228出版社
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tcb.2005.02.006
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After the discovery of basolateral sorting signals for polarized delivery in epithelial cells in the early 1990s, it was only about a decade later that the epithelial-cell-specific sorting adaptor APAB was discovered. APAB decodes a subclass of basolateral sorting signals and localizes to the recycling endosomes as opposed to the trans-Golgi network, suggesting that this is its major site of action. Furthermore, AP-1B does not simply select its cargo but also facilitates the recruitment of the exocyst complex needed for subsequent fusion with the plasma membrane. This review discusses our current knowledge of APAB function in cargo sorting to the basolateral membrane and its impact on our understanding of the similarities and differences between AP-1B-minus fibroblasts and APAB-positive epithelial cells.
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