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Cover Image
Cover Image
On the cover
In an explanted mammary duct, epithelial cells expressing the transcription factor Twist1 (marked by a green fluorescent reporter) disseminate into the extracellular matrix, whereas Twist1-negative cells (red) undergo branching morphogenesis. Shamir et al. reveal that Twist1 promotes cell dissemination without repressing E-cadherin or inducing an epithelial-to-mesenchymal transition.
Image © 2014 Shamir et al.
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In This Issue
In Focus
Mdm2 pulls the plug on glycolysis
The ubiquitin ligase induces senescence by promoting degradation of the glycolytic enzyme phosphoglycerate mutase.
People & Ideas
Feroz Papa: Saving cells from themselves
Papa studies adaptive and maladaptive responses to ER stress.
Review
Report
A Bub1–Mad1 interaction targets the Mad1–Mad2 complex to unattached kinetochores to initiate the spindle checkpoint
A Bub1–Mad1 interaction targets the Mad1–Mad2 complex to unattached kinetochores to initiate the spindle checkpoint.
Preperoxisomal vesicles can form in the absence of Pex3
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Article
Nuclear lamin stiffness is a barrier to 3D migration, but softness can limit survival
Lamins impede 3D migration but also promote survival against migration-induced stresses.
Arp5 is a key regulator of myocardin in smooth muscle cells
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Mechanisms of HsSAS-6 assembly promoting centriole formation in human cells
HsSAS-6 homodimers are present in the cytoplasm and assemble into ninefold symmetrical arrays at centrosomes, thus initiating procentriole formation.
CIP2A oncoprotein controls cell growth and autophagy through mTORC1 activation
As part of a regulatory loop linking cell metabolism, growth, and proliferation, CIP2A promotes mTORC1-mediated cell growth and autophagy inhibition but is itself down-regulated by autophagy.
Senescence-inducing stress promotes proteolysis of phosphoglycerate mutase via ubiquitin ligase Mdm2
Mdm2, a ubiquitin ligase and downstream effector of p53, attenuates the proliferative potential of primary cells via ubiquitination and degradation of the glycolytic enzyme PGAM under senescence-inducing stress.
Trim32 reduces PI3K–Akt–FoxO signaling in muscle atrophy by promoting plakoglobin–PI3K dissociation
By promoting dissociation of the desmosomal component plakoglobin from PI3K, the ubiquitin ligase Trim32 reduces PI3K–Akt–FoxO signaling in normal and atrophying muscle, potentially contributing to insulin resistance and catabolic disorders.
Munc18-1 redistributes in nerve terminals in an activity- and PKC-dependent manner
PKC-dependent dynamic control of Munc18-1 levels enables individual synapses to tune their output during periods of activity.
Caveolae regulate the nanoscale organization of the plasma membrane to remotely control Ras signaling
Caveolae transduce mechanical stress into plasma membrane lipid alterations that disrupt Ras organization in an isoform-specific manner and modulate downstream signal transduction.
Fission of SNX-BAR–coated endosomal retrograde transport carriers is promoted by the dynamin-related protein Vps1
Endosomal sorting and fission machineries act together to produce retrograde transport carriers.
Mechanosignaling between central apparatus and radial spokes controls axonemal dynein activity
Nonspecific intermolecular collision between the central pair apparatus and radial spokes underlies a mechanosensing mechanism that regulates dynein activity in Chlamydomonas flagella.
MarvelD3 couples tight junctions to the MEKK1–JNK pathway to regulate cell behavior and survival
MarvelD3 recruits MEKK1 to tight junctions, which down-regulates JNK signaling and is essential for maintaining the integrity of tight junctions and restricting cell migration and proliferation.
Twist1-induced dissemination preserves epithelial identity and requires E-cadherin
Expression of the transcription factor Twist1 induces dissemination of normal mammary epithelial cells without changing the RNA levels of epithelial-specific genes such as E-cadherin.
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