Journal: Journal of Cell Science
Article Title: CLIC4 is a cytokinetic cleavage furrow protein that regulates cortical cytoskeleton stability during cell division
doi: 10.1242/jcs.241117
Figure Lengend Snippet: An optogenetic targeting of CLIC4 to the mitochondria delays cell division. (A) Schematic of Mitotrap used in this experiment. In all cases cells expressing endogenously tagged GFP–CLIC4 were co-transfected with Cry2-GFP-VHH and CIB-Tom20 plasmids and pulsed with a 488 nm laser to re-target GFP–CLIC4 at the mitochondria. (B) Interphase cell exposed to 488 nm to activate Mitotrap. Mitochondria are labeled in red and endogenous GFP–CLIC4 in green. (C,D) Still images from time-lapse microscopy where Mitotrap was activated. Arrows point to blebs or cytokinesis failure induced by GFP–CLIC4 Mitotrap. Scale bars: 100 μm. (E) Quantification of time required for cells to complete mitotic cell division in control and Mitotrapped cells. Data shown are the means and standard deviations.
Article Snippet: The following plasmids were used: pCAG:IRES-CLIC4 (a gift from the Sung Laboratory, Cornell University, Ithaca, NY), pEGFP-N3:CLIC4, RhoA FRET biosensor (a gift from Gary Bokoch, Scripps Research Institute, San Diego, CA), pGEX:CLIC4, pCMV-SNAP-CRY2-VHH(GFP) (58370; Addgene, Watertown, MA), Tom20-CIB-stop (117243; Addgene), Cry2PHR-mCH-RhoA (42959; Addgene) and pGEX6P1-GFP-Nanobody (61838; Addgene).
Techniques: Expressing, Transfection, Labeling, Time-lapse Microscopy