Collision of Expanding Actin Caps with Actomyosin Borders for Cortical Bending and Mitotic Rounding in a Syncytium (Developmental Cell)

For mitosis in the syncytial Drosophila embryo, each nucleus organizes a surface Arp2/3 actin cap encircled by an actomyosin border. Zhang et al. show that the assembling caps and borders engage each other physically to pattern the syncytial cortex in 2D and to generate compartments for mitotic spindles in 3D.