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In Focus

Researchers describe how multiple mechanisms ensure that mitotic proteins are degraded in the correct sequence.

People & Ideas

Valdivia studies how the pathogen Chlamydia trachomatis interacts with its host cell.



Cell biology in development


To ensure proper mitotic progression, robust ordering of the destruction of APC/CCdc20 substrates is driven by the integration of molecular mechanisms ranging from phosphorylation-dependent interaction with substrates to sensing of the status of the spindle assembly checkpoint.

In both Xenopus laevis egg extract and human cells, an increase in cytosolic calcium activates the endogenous ribonuclease XendoU/hEndoU, which localizes to the ER, promotes RNA cleavage and RNP removal, and induces ER network assembly.

The exocyst subunit Exo70p is targeted to cortical sites in an actin-independent manner through a direct interaction with the polarity determinant Bem1p.

Dynamin function is essential for cell–cell fusion in both osteoclast precursors and myoblasts in part through its effects on endocytosis.

The budding yeast kinase Hrr25 regulates two selective autophagy–related pathways by phosphorylating degradation target receptors and thereby promoting their interaction with Atg11 and the formation of autophagosomal membrane.

Apical membrane organization of nonconfluent epithelial cells is driven by a dynamic network of actin and myosin II filaments.

In the early stages of cilia formation in the mouse airway epithelium, Chibby is recruited to the distal appendages of centrioles and is necessary for efficient ciliary vesicle formation and basal body docking at the apical cell membrane.

In Duchenne muscular dystrophy, asynchronous regeneration in microenvironments within muscle tissue results in development of fibrosis in lieu of global muscle recovery.


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