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An emerging role for IQGAP1 in tight junction control
Journal article   Open access   Peer reviewed

An emerging role for IQGAP1 in tight junction control

Barbara E Tanos, Charles Yeaman and Enrique Rodriguez-Boulan
Small GTPases, Vol.9(5), pp.375-383
09/03/2018
DOI: 10.1080/21541248.2016.1244440
PMCID: PMC5997139
PMID: 27880081
url
https://doi.org/10.1080/21541248.2016.1244440View
Published (Version of record) Open Access

Abstract

IQGAP1 is a scaffold protein involved in the assembly of adherens junctions. Our work has recently revealed a novel role for IQGAP1 in the regulation of tight junctions (TJ) through differential recruitment of claudins to the nascent TJ. Here, we discuss the potential mechanisms of this regulation, including IQGAP1 effects on CDC42, and IQGAP1 interactions with sorting/trafficking molecules (e.g. Exo70). Given the many roles of IQGAP1 and the large number of interacting partners, we focus our discussion of these functions in the context of junction formation, trafficking, growth factor signaling and cancer. We also propose a potential role for IQGAP1 in regulating epithelial integrity and compartmentalized signaling in epithelia.
cdc42 IQGAP1 tight junctions claudins exocyst

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