In This Issue
People & Ideas
Tpr is a kinetochore-independent, rate-limiting factor required to mount and sustain a robust spindle assembly checkpoint response by stabilizing Mad1 and Mad2 before mitosis.
Novel septin 9 repeat motifs interact with the acidic C-terminal tails of β-tubulin to promote microtubule bundling and asymmetric neurite growth.
A decrease in Arp2/3 levels results in an NF-κB–dependent increase in the expression of several secreted factors, resulting in nonautonomous effects on chemotaxis.
Metacaspase-dependent autophagy in plants promotes cell disassembly during vacuolar cell death and inhibits necrosis.
Higher-order unfolding of satellite heterochromatin is a consistent and early event in cell senescence
Higher-order unfolding of peri/centromeric satellite DNA is a consistent and early event in senescence of cultured normal human and mouse cells, progeria cells, and a senescent tumor.
Arrayed BUB recruitment modules in the kinetochore scaffold KNL1 promote accurate chromosome segregation
The kinetochore scaffold KNL1 contains an extensive array of short linear sequence modules that each independently can localize BUB1 but that together provide enhanced efficiency of chromosome segregation.
KNL1 facilitates phosphorylation of outer kinetochore proteins by promoting Aurora B kinase activity
KNL1 is essential for efficient kinetochore–microtubule attachment dynamics during mitosis, in part through promotion of Bub1-mediated targeting of Aurora B to the kinetochore.
In vitro reconstitution of an mRNA-transport complex reveals mechanisms of assembly and motor activation
The budding yeast SHE mRNA-transport complex dimerizes to activate processive RNA transport, irrespective of the presence of RNA cargo, and multimerizes upon binding RNAs with multiple localization elements.
Acyl-CoA synthetase 3 is recruited early to lipid droplet assembly sites on the ER, where it is required for efficient lipid droplet nucleation and lipid storage.
JAK tyrosine kinases promote integrin activation and integrin-meditated lymphocyte trafficking by bridging chemokine receptors to activation of Rho and Rap.
The N terminus of SKAP55 enables T cell adhesion to TCR and integrin ligands via distinct mechanisms
In addition to promoting integrin activation at the immunological synapse, SKAP55 links T cell antigen receptor-associated signaling molecules to the cytoskeleton and promotes integrin-independent adhesion via the T cell receptor.
The microtubule plus end–binding protein CLASP2 localizes to adherens junctions via direct interaction with p120-catenin and is required for adherens junction stability.
WASH and exocyst promote pericellular matrix degradation and tumor cell invasion by enabling localized exocytosis of MT1-MMP from late endosomes.
Uptake of bacterial filaments by macrophages is characterized by a prolonged phagocytic cup stage and diminished microbicidal activity during phagosome maturation.