RT Journal Article
SR Electronic
T1 CLIC4 and CLIC1 bridge plasma membrane and cortical actin network for a successful cytokinesis
JF Life Science Alliance
JO Life Sci. Alliance
FD Life Science Alliance LLC
SP e201900558
DO 10.26508/lsa.201900558
VO 3
IS 2
A1 Zeynep Cansu Uretmen Kagiali
A1 Nazan Saner
A1 Mehmet Akdag
A1 Erdem Sanal
A1 Beste Senem Degirmenci
A1 Gurkan Mollaoglu
A1 Nurhan Ozlu
YR 2020
UL https://www.life-science-alliance.org/content/3/2/e201900558.abstract
AB CLIC4 and CLIC1 are members of the well-conserved chloride intracellular channel proteins (CLICs) structurally related to glutathione-S-transferases. Here, we report new roles of CLICs in cytokinesis. At the onset of cytokinesis, CLIC4 accumulates at the cleavage furrow and later localizes to the midbody in a RhoA-dependent manner. The cell cycle–dependent localization of CLIC4 is abolished when its glutathione S-transferase activity–related residues (C35A and F37D) are mutated. Ezrin, anillin, and ALIX are identified as interaction partners of CLIC4 at the cleavage furrow and midbody. Strikingly, CLIC4 facilitates the activation of ezrin at the cleavage furrow and reciprocally inhibition of ezrin activation diminishes the translocation of CLIC4 to the cleavage furrow. Furthermore, knockouts of CLIC4 and CLIC1 cause abnormal blebbing at the polar cortex and regression of the cleavage furrow at late cytokinesis leading to multinucleated cells. We conclude that CLIC4 and CLIC1 function together with ezrin where they bridge plasma membrane and actin cytoskeleton at the polar cortex and cleavage furrow to promote cortical stability and successful completion of cytokinesis in mammalian cells.