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In This Issue

In Focus

Researchers track the tethering and fusion of individual secretory vesicles in budding yeast.

People & Ideas

Shao studies pathogenic bacteria and their hosts’ innate immune mechanisms.

From the Archive

In 1996, Robinett et al. developed a way to visualize chromatin structure and dynamics in living cells.



An analysis of individual secretory vesicles during yeast exocytosis explores how Sec4-GTP hydrolysis, Myo2p motors, an SM protein, and exocyst components contribute to the timing of vesicle tethering and fusion.


BLM helicase facilitates telomere replication by resolving G-quadruplex structures that can form in the G-rich repeats during leading strand synthesis.

The microtubule-associated protein BRISC regulates the interaction of NuMA with dynein and importin-β by removing K63-linked polyubiquitin chains from NuMA, thereby promoting proper bipolar spindle assembly.

ROCK1 forms the stable actomyosin filament bundles that initiate front–back and dendritic spine polarity, while ROCK2 regulates contractile force, Rac1 activity, and cofilin-mediated actin remodeling at the leading edge of migratory cells and the spine head of neurons.

The Ras-like small G-protein MglA is an integral part of the gliding motility complex at bacterial focal adhesions and stimulates the assembly of the motility complex by directly connecting it to the MreB actin cytoskeleton.

IQGAP1 mediates CXCR4 cell surface expression and signaling by regulating EEA-1+ endosome interactions with microtubules during CXCR4 trafficking and recycling.

Ypt1 directly recruits the kinase Hrr25 to COPII vesicles to activate it in two different pathways: ER to Golgi and the catabolic macroautophagy pathway induced in response to cell stress.

The protein biogenesis factor NAC regulates the access of the enzyme MetAP and the signal recognition particle (SRP) to the ribosome, functions in SRP-dependent targeting, and can act to protect substrates from aggregation before translocation

The retromer-associated DNAJ protein Rme-8 is necessary for normal Notch recycling, and reductions in Rme-8 sensitize cells so that additional loss-of-sorting retromer or ESCRT-0 components have catastrophic effects.

The adaptor CIN85 enhances TGFβ-induced signaling and cellular responses to TGFβ by promoting the expression of TGFβ receptors on the surface in a Rab11-dependent manner.

Visualization of single cadherins within cell membrane at nanometric resolution shows that E-cadherins arrange in ordered clusters and that these clusters control the anchoring of cadherin to actin and cell–cell contact fluidity.

Myosin 1b functions as an effector of EphB2/ephrinB signaling and controls cell morphology and cell repulsion.

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