Tension-dependent Regulation of Mammalian Hippo Signaling Through LIMD1

Overview

Journal J Cell Sci

Specialty Cell Biology

Date 2018 Feb 15

PMID 29440237

Citations 54

Authors

Consuelo Ibar

Elmira Kirichenko

Benjamin Keepers

Edward Enners

Katelyn Fleisch

Kenneth D Irvine

Affiliations

Soon will be listed here.

Abstract

Hippo signaling is regulated by biochemical and biomechanical cues that influence the cytoskeleton, but the mechanisms that mediate this have remained unclear. We show that all three mammalian Ajuba family proteins - AJUBA, LIMD1 and WTIP - exhibit tension-dependent localization to adherens junctions, and that both LATS family proteins, LATS1 and LATS2, exhibit an overlapping tension-dependent junctional localization. This localization of Ajuba and LATS family proteins is also influenced by cell density, and by Rho activation. We establish that junctional localization of LATS kinases requires LIMD1, and that LIMD1 is also specifically required for the regulation of LATS kinases and YAP1 by Rho. Our results identify a biomechanical pathway that contributes to regulation of mammalian Hippo signaling, establish that this occurs through tension-dependent LIMD1-mediated recruitment and inhibition of LATS kinases in junctional complexes, and identify roles for this pathway in both Rho-mediated and density-dependent regulation of Hippo signaling.

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