Membrane trafficking articles within Nature Communications

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  • Article
    | Open Access

    Assembly of filamentous RSV particles is incompletely understood due to a lack of techniques suitable for live-cell imaging. Here Vanover et al. use labeled soybean agglutinin to selectively label RSV G protein and show how filamentous RSV assembly, initiated in the cytoplasm, uses G protein recycled from the plasma membrane.

    • Daryll Vanover
    • , Daisy V. Smith
    •  & Philip J. Santangelo

  • Article
    | Open Access

    Integrins are cell-surface adhesion receptors that are modulated by endo-exocytic trafficking, but existing tools to study this process can interfere with function. Here the authors develop β1 integrins carrying traceable tags in the extracellular domain; a pH-sensitive pHlourin tag or a HaloTag to facilitate dye attachment.

    • Clotilde Huet-Calderwood
    • , Felix Rivera-Molina
    •  & David A. Calderwood

  • Article
    | Open Access

    Ratiometric fluorescent pH probes are useful tools to monitor acidification of vesicles during endocytosis, but the size of vesicles is below the diffraction limit. Here the authors develop a family of ratiometric pH sensors for use in STED super-resolution microscopy, and optimize their delivery to endosomes.

    • Douglas S. Richardson
    • , Carola Gregor
    •  & Stefan W. Hell

  • Article
    | Open Access

    Various stages of tissue morphogenesis involve the contraction of epithelial surfaces. Here, the authors identify the Rab GTPase Rab35 as an essential component of this contractile process, which functions as a membrane ratchet to ensure unidirectional movement of intercalating cells.

    • Cayla E. Jewett
    • , Timothy E. Vanderleest
    •  & J. Todd Blankenship

  • Article
    | Open Access

    Protein-tyrosine phosphatases (PTPs) are thought to be major targets of receptor-activated reactive oxygen species (ROS). Here the authors describe a method that allows the localized visualization of oxidized intermediates of PTPs inside cells during signaling, and provide support for the “redoxosome” model.

    • Ryouhei Tsutsumi
    • , Jana Harizanova
    •  & Benjamin G. Neel

  • Article
    | Open Access

    The different composition of Golgi cisternae gave rise to two different models for intra-Golgi traffic: one where stable cisternae communicate via vesicles and another one where cisternae biochemically mature to ensure anterograde transport. Here, the authors provide evidence in support of the stable compartments model.

    • Myun Hwa Dunlop
    • , Andreas M. Ernst
    •  & James E. Rothman

  • Article
    | Open Access

    The protease Atg4 mediates Atg8 lipidation, required for autophagosome biogenesis, but also triggers Atg8 release from the membranes, however is unclear how these steps are coordinated. Here the authors show that phosphorylation by Atg1 inhibits Atg4 at autophagosome formation sites.

    • Jana Sánchez-Wandelmer
    • , Franziska Kriegenburg
    •  & Fulvio Reggiori

  • Article
    | Open Access

    There are seven well-established types of Botulinum neurotoxins (BoNTs). Here the authors report the identification and characterization of a new type of BoNT—BoNT/X—which cleaves a different site on canonical BoNTs substrates and targets SNARE family members not cleaved by known BoNTs.

    • Sicai Zhang
    • , Geoffrey Masuyer
    •  & Pål Stenmark

  • Article
    | Open Access

    The peripheral membrane proto-oncogene Src family protein tyrosine kinases (SFKs) transmit growth factor signals to the cytoplasm. Here the authors show that the solubilising factor UNC119 sequesters myristoylated SFKs to maintain its enrichment at the plasma membrane to enable signal transduction.

    • Antonios D. Konitsiotis
    • , Lisaweta Roßmannek
    •  & Philippe I. H. Bastiaens

  • Article
    | Open Access

    Clathrin lattices coat flat membrane regions, called plaques, whose regulation and function are poorly understood. Here the authors find that plaques are regulated by actin dynamics and contain both the endocytic and the cell adhesion machineries, and are involved in endocytosis of specific cargos, and cell migration.

    • Daniela Leyton-Puig
    • , Tadamoto Isogai
    •  & Metello Innocenti

  • Article
    | Open Access

    The anterograde movement of Golgi-derived vesicles requires the small GTPase RAB6, while its effector ELKS targets these vesicles to particular areas of the plasma membrane. Here the authors show that RAB6 and ELKS function in the biogenesis of melanosome, demonstrating that the secretory pathway can be directed towards intracellular organelles of endosomal origin.

    • Anand Patwardhan
    • , Sabine Bardin
    •  & Cédric Delevoye

  • Article
    | Open Access

    Mitochondrial fusion is crucial for cellular homeostasis but its regulation is still not fully understood. Here the authors report that a cross-talk between ubiquitin protease Ubp2 and ligases Mdm30 and Rsp5 modulates mitofusin Fzo1 levels and fatty acids saturation and thus mitochondrial fusion.

    • Laetitia Cavellini
    • , Julie Meurisse
    •  & Mickael M. Cohen

  • Article
    | Open Access

    Asymmetric segregation of cell fate determinants during cell division governs daughter cell fate. Here the authors show that Sara endosomes, known to regulate Notch signalling, are targeted to the mitotic spindle and once phosphorylated are asymmetrically dispatched into a daughter cell to determine cell fate.

    • Sylvain Loubéry
    • , Alicia Daeden
    •  & Marcos Gonzalez-Gaitan

  • Article
    | Open Access

    Cellular cargo transported along actin filaments is faced with a directional choice at an intersection. Here the authors show that myosin Va-bound cargo prefers to go straight through the intersection, and propose a model to explain this by a tug-of-war between motors on the lipid cargo that engage the actin tracks.

    • Andrew T. Lombardo
    • , Shane R. Nelson
    •  & David M. Warshaw

  • Article
    | Open Access

    Mutations in the granulin gene are associated with frontotemporal lobe dementia (FTLD) and a lysosomal storage disease. The authors show that reduced progranulin levels leads to impaired neuronal uptake and lysosomal delivery of prosaposin, and that decreased prosaposin expression in mice leads to FTLD-like behaviour.

    • Xiaolai Zhou
    • , Lirong Sun
    •  & Fenghua Hu

  • Article
    | Open Access

    The role of exosomes in intercellular communication is well established, however less in known about the biological roles of exosome secretion in exosome-secreting cells. Here the authors show that exosome secretion controls cellular homeostasis in exosome-secreting cells by removing harmful cytoplasmic DNA from cells.

    • Akiko Takahashi
    • , Ryo Okada
    •  & Eiji Hara

  • Article
    | Open Access

    Beta-arrestins play central roles in the mechanisms regulating GPCR signalling and trafficking. Here the authors identify a selective inhibitor of the interaction between β-arrestin and the β2-adaptin subunit of the clathrin adaptor protein AP-2, which they use to dissect the role of the β-arrestin/β2-adaptin interaction in GPCR signalling.

    • Alexandre Beautrait
    • , Justine S. Paradis
    •  & Michel Bouvier

  • Article
    | Open Access

    The endocytic adaptor protein complex AP-2 is mostly known for its role in endocytosis and in synaptic vesicle reformation. Here the authors show that AP-2 also mediates retrograde transport of TrkB-containing autophagosomes in neurons; this process promotes neuronal complexity and prevents the degeneration of cortical and thalamic neurons.

    • Natalia L. Kononenko
    • , Gala A. Claßen
    •  & Volker Haucke

  • Article
    | Open Access

    The exocyst delivers basolateral proteins from the secretory pathway to the plasma membrane of epithelial cells close to tight junctions. Here the authors show that Par3 acts as a docking site for the exocyst to regulate polarized delivery of basolateral proteins and this is essential to prevent apoptosis and promote mammary cell survival.

    • Syed Mukhtar Ahmed
    •  & Ian G. Macara

  • Article
    | Open Access

    Ephrin receptors mediate contact inhibition, but their intracellular trafficking during this process is unknown. Here the authors show that EphA2 receptor trafficking is regulated by the Rab GTPase effector Rab-coupling protein, which associates with Rab14-endosomes upon LMTK3-mediated phosphorylation.

    • Christine Gundry
    • , Sergi Marco
    •  & Jim C. Norman

  • Article
    | Open Access

    Damaged mitochondria are normally cleared through canonical and alternative autophagy pathways. Here, the authors report that mitochondria can be cleared through an autophagy-independent endosomal-lysosomal pathway that depends on Parkin-dependent sequestration of mitochondria in Rab5-positive early endosomes.

    • Babette C. Hammerling
    • , Rita H. Najor
    •  & Åsa B. Gustafsson

  • Article
    | Open Access

    Membrane fusion during exocytosis is mediated by interaction between SNARE proteins on vesicles and the cell membrane, but how SNARE complex assembly is initiated remains unknown. Here, the authors show that interaction of Sec3 with Sso2 on the plasma membrane promotes formation of an Sso2–Sec9 complex, an early step in SNARE assembly, likely by inhibiting Sso2 auto-inhibition.

    • Peng Yue
    • , Yubo Zhang
    •  & Wei Guo

  • Article
    | Open Access

    The Mon1-Ccz1 (MC1) complex is a Rab guanine nucleotide exchange factor (RabGEF) for Ypt7/Rab7 important for endosomal maturation. Here the authors present the biochemical and structural characterization of MC1, elucidating its catalytic mechanism and showing that MC1 represents novel class of RabGEFs.

    • Stephan Kiontke
    • , Lars Langemeyer
    •  & Daniel Kümmel

  • Article
    | Open Access

    Autophagy must be tightly controlled at each step of the process. Here the authors show that HS1BP3 binds phosphatidic acid (PA) at autophagosome precursors and negatively regulates autophagosome formation by modulating the activity and localization of the PA-producing enzyme phospholipase D1.

    • Petter Holland
    • , Helene Knævelsrud
    •  & Anne Simonsen

  • Article
    | Open Access

    Mammalian eggs release cortical granules to avoid being fertilized by more than a single sperm as polyspermy results in nonviable embryos. Here, the authors describe the mechanism driving translocation of the granules to the cortex in the mouse egg and show this process is essential to prevent polyspermy.

    • Liam P. Cheeseman
    • , Jérôme Boulanger
    •  & Melina Schuh

  • Article
    | Open Access

    Endocytosis of the type I interferon receptor (IFNAR) is required for JAK/STAT signalling. Here the authors show that the internalized IFNAR1 and IFNAR2 subunits are differentially sorted by the retromer complex at the early endosome and this controls JAK/STAT signalling and gene transcription.

    • Daniela Chmiest
    • , Nanaocha Sharma
    •  & Christophe Lamaze

  • Article
    | Open Access

    VPS15 is known as a VPS34-associated protein that functions in intracellular trafficking and autophagy. Here the authors identify a role for VPS15 in ciliopathy and ciliary phenotypes, and show that it interacts with GM130 and functions in IFT20-dependent cis-Golgi to cilium trafficking.

    • Corinne Stoetzel
    • , Séverine Bär
    •  & Hélène Dollfus

  • Article
    | Open Access

    Multivesicular bodies (MVB) are endosomal compartments that can either fuse with the plasma membrane for the secretion of exosomes, or fuse with the lysosome and be degraded along with their contents. Here, the authors show that ISGylation of the MVB protein TSG101 impairs exosome secretion and acts as a regulator of MVB fate.

    • Carolina Villarroya-Beltri
    • , Francesc Baixauli
    •  & Francisco Sánchez-Madrid

  • Article
    | Open Access

    Retromer is recruited to endosomes by the small GTPase Rab7 and sorting nexin 3. Here, the authors report the interaction between a GTPase-activating protein TBC1d5 and Rab7, examine the biochemical details of the interaction with retromer, and discuss the implications for receptor trafficking.

    • Da Jia
    • , Jin-San Zhang
    •  & Michael K. Rosen

  • Article
    | Open Access

    How neurons produce energy to fuel fast axonal transport is only partially understood. Authors here report that most glycolytic enzymes are enriched in motile vesicles, and such glycolytic machinery can produce ATP autonomously to propel vesicle movement along microtubules in a cell-free assay.

    • María-Victoria Hinckelmann
    • , Amandine Virlogeux
    •  & Frédéric Saudou

  • Article
    | Open Access

    Sphingolipids in the trans-Golgi network have been implicated in polar trafficking. Here Wattelet-Boyer et al. show that hydroxylated C24- and C26-acyl-chain sphingolipids are enriched in trans-Golgi network subdomains that are critical for polar sorting of the PIN2 auxin carrier in plant cells.

    • Valérie Wattelet-Boyer
    • , Lysiane Brocard
    •  & Yohann Boutté

  • Article
    | Open Access

    Sarcolemma lesions are sealed by a repair patch of lipids and proteins that prevents cell death and myopathy. Here the authors show that the "eat-me" signal phosphatidylserine is sorted from adjacent sarcolemma to the repair patch in a Dysferlin dependent process in zebrafish and human cells.

    • Volker Middel
    • , Lu Zhou
    •  & Uwe Strähle

  • Article
    | Open Access

    EphA2/ErbB2 complex is important in promoting breast cancer but the mechanism by which these receptor tyrosine kinases are exported from the endoplasmic reticulum is unknown. Here the authors show that Anks1a acts as a cargo adaptor in sorting EphA2 into COPII vesicles, thus modulating the surface level of EphA2.

    • Haeryung Lee
    • , Hyuna Noh
    •  & Soochul Park

  • Article
    | Open Access

    HER2 is frequently overexpressed in breast cancer in association with increased metastatic potential. Here, the authors show that HER2 overexpression causes deformation of cell membranes in a signalling-independent manner that contributes to the disease phenotype by disrupting epithelial features.

    • Inhee Chung
    • , Mike Reichelt
    •  & Mark X. Sliwkowski

  • Article
    | Open Access

    The transport of secretory proteins from the endoplasmic reticulum to the Golgi depends on COPII-coated vesicles. Here, the authors show that activation-induced alternative splicing of Sec16 controls adaptation of COPII transport to increased secretory cargo upon T cell activation.

    • Ilka Wilhelmi
    • , Regina Kanski
    •  & Florian Heyd

  • Article
    | Open Access

    Polarisation of epithelial cells causes lumen formation, which is mediated by apical membrane initiation site (AMIS) and FIP5, but how this is regulated is unclear. Here, the authors identify cingulin as a FIP-5 interacting protein, recruiting the Rac1-WAVE/Scar complex to the AMIS and branched actin formation.

    • Anthony J. Mangan
    • , Daniel V. Sietsema
    •  & Rytis Prekeris

  • Article
    | Open Access

    Lysine hydroxylation of procollagen precursors by LH3 is required for collagen fibril crosslinking and stabilization. Here the authors show that the trafficking protein VIPAR is required for correct sorting of LH3 into post-Golgi collagen carriers and for correct collagen modification and structure.

    • Blerida Banushi
    • , Federico Forneris
    •  & Paul Gissen

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