The building blocks for basolateral vesicles in polarized epithelial cells

Heike Fölsch*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

67 Scopus citations


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 AP-1B was discovered. AP-1B 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 AP-1B 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 AP-1B-positive epithelial cells.

Original languageEnglish (US)
Pages (from-to)222-228
Number of pages7
JournalTrends in Cell Biology
Issue number4
StatePublished - Apr 2005

ASJC Scopus subject areas

  • Cell Biology


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