A kinase cascade leading to Rab11-FIP5 controls transcytosis of the polymeric immunoglobulin receptor

Su, T. et al. (2010) A kinase cascade leading to Rab11-FIP5 controls transcytosis of the polymeric immunoglobulin receptor. Nature Cell Biology, 12(12), pp. 1143-1153. (doi: 10.1038/ncb2118)

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Publisher's URL: http://dx.doi.org/10.1038/ncb2118


Polymeric immunoglobulin A (pIgA) transcytosis, mediated by the polymeric immunoglobulin receptor (pIgR), is a central component of mucosal immunity and a model for regulation of polarized epithelial membrane traffic. Binding of pIgA to pIgR stimulates transcytosis in a process requiring Yes, a Src family tyrosine kinase (SFK). We show that Yes directly phosphorylates EGF receptor (EGFR) on liver endosomes. Injection of pIgA into rats induced EGFR phosphorylation. Similarly, in MDCK cells, pIgA treatment significantly increased phosphorylation of EGFR on various sites, subsequently activating extracellular signal-regulated protein kinase (ERK). Furthermore, we find that the Rab11 effector Rab11-FIP5 is a substrate of ERK. Knocking down Yes or Rab11-FIP5, or inhibition of the Yes-EGFR-ERK cascade, decreased pIgA-pIgR transcytosis. Finally, we demonstrate that Rab11-FIP5 phosphorylation by ERK controls Rab11a endosome distribution and pIgA-pIgR transcytosis. Our results reveal a novel Yes-EGFR-ERK-FIP5 signalling network for regulation of pIgA-pIgR transcytosis.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Bryant, Dr David
Authors: Su, T., Bryant, D. >, Luton, F., Vergés, M., Ulrich, S. M., Hansen, K. C., Datta, A., Eastburn, D. J., Burlingame, A. L., Shokat, K. M., and Mostov, K. E.
College/School:College of Medical Veterinary and Life Sciences > Institute of Cancer Sciences
Journal Name:Nature Cell Biology
Publisher:Nature Publishing Group
ISSN (Online):1476-4679

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