Cell division orientation is coupled to cell–cell adhesion by the E-cadherin/LGN complex

Martijn Gloerich (), Julie M. Bianchini, Kathleen A. Siemers, Daniel J. Cohen and W. James Nelson ()
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Martijn Gloerich: Stanford University
Julie M. Bianchini: Stanford University
Kathleen A. Siemers: Stanford University
Daniel J. Cohen: Stanford University
W. James Nelson: Stanford University

Nature Communications, 2017, vol. 8, issue 1, 1-11

Abstract: Abstract Both cell–cell adhesion and oriented cell division play prominent roles in establishing tissue architecture, but it is unclear how they might be coordinated. Here, we demonstrate that the cell–cell adhesion protein E-cadherin functions as an instructive cue for cell division orientation. This is mediated by the evolutionarily conserved LGN/NuMA complex, which regulates cortical attachments of astral spindle microtubules. We show that LGN, which adopts a three-dimensional structure similar to cadherin-bound catenins, binds directly to the E-cadherin cytosolic tail and thereby localizes at cell–cell adhesions. On mitotic entry, NuMA is released from the nucleus and competes LGN from E-cadherin to locally form the LGN/NuMA complex. This mediates the stabilization of cortical associations of astral microtubules at cell–cell adhesions to orient the mitotic spindle. Our results show how E-cadherin instructs the assembly of the LGN/NuMA complex at cell–cell contacts, and define a mechanism that couples cell division orientation to intercellular adhesion.

Date: 2017
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DOI: 10.1038/ncomms13996

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