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| Open AccessSynDLP is a dynamin-like protein of Synechocystis sp. PCC 6803 with eukaryotic features
In eukaryotes, dynamins and dynamin-like proteins (DLPs) are involved in various membrane remodeling processes. Here, the authors present the structure and functional characterization of a DLP of the cyanobacterium Synechocystis sp. PCC 6803.
- Lucas Gewehr
- , Benedikt Junglas
- & Dirk Schneider
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Article
| Open AccessFERARI and cargo adaptors coordinate cargo flow through sorting endosomes
It is estimated that about 80% of endocytosed material is recycled back to the plasma membrane. Here, the authors show that kiss-and-run of Rab5 early endocytic and Rab11 recycling vesicles on sorting endosomes allow cargo flow, providing more robustness and fidelity to the sorting process.
- Jachen A. Solinger
- , Harun-Or Rashid
- & Anne Spang
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Article
| Open AccessCryoEM structure of the super-constricted two-start dynamin 1 filament
Dynamin mediates the fission of vesicles during endocytosis. Here, the authors report the cryoEM structure of a super-constricted two-start dynamin 1 filament- one of the two known helical forms of dynamin, with insights into the molecular mechanisms of dynamin-mediated membrane scission.
- Jiwei Liu
- , Frances Joan D. Alvarez
- & Peijun Zhang
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Article
| Open AccessORP1L mediated PI(4)P signaling at ER-lysosome-mitochondrion three-way contact contributes to mitochondrial division
Membrane contact sites between organelles have specialized functions that are only beginning to be understood. Here, the authors show that ORP1L mediates lysosome recruitment and PI(4)P signaling at endoplasmic reticulum-lysosome-mitochondria three-way contact sites involved in mitochondrial division.
- Maxime Boutry
- & Peter K. Kim
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Article
| Open AccessSalmonella effector SopD promotes plasma membrane scission by inhibiting Rab10
Salmonella secretes the effector protein SopD into the host cell cytoplasm, leading to scission of the plasma membrane through unclear mechanisms. Here, Boddy et al. show that SopD binds to and inhibits the small GTPase Rab10, thus promoting removal of Rab10 and recruitment of dynamin-2 to drive plasma membrane scission.
- Kirsten C. Boddy
- , Hongxian Zhu
- & John H. Brumell
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Article
| Open AccessCdk5 and GSK3β inhibit fast endophilin-mediated endocytosis
Endocytosis mediates the cellular uptake of micronutrients and cell surface proteins. Here, the authors show that Cdk5 and GSK3β are negative regulators of fast Endophilin-mediated endocytosis (FEME).
- Antonio P. A. Ferreira
- , Alessandra Casamento
- & Emmanuel Boucrot
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Article
| Open AccessALDH7A1 inhibits the intracellular transport pathways during hypoxia and starvation to promote cellular energy homeostasis
Intracellular vesicle transport can be regulated by Brefeldin‐A ADP‐Ribosylated Substrate (BARS) during vesicle fission. Here, the authors show that NADH generated by aldehyde dehydrogenase 7A1 (ALDH7A1) inhibits intracellular transport by targeting BARS and inhibiting COPI vesicle fission during situations of energy deprivation
- Jia-Shu Yang
- , Jia-Wei Hsu
- & Victor W. Hsu
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Article
| Open AccessThe late stage of COPI vesicle fission requires shorter forms of phosphatidic acid and diacylglycerol
Phosphatidic acid and diacylglycerol are required for COPI vesicle fission. Here, the authors find that shorter forms of these lipids promote the late stage of COPI vesicle fission, further suggesting how lipid geometry contributes to membrane deformation in driving fission.
- Seung-Yeol Park
- , Jia-Shu Yang
- & Victor W. Hsu
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Article
| Open AccessDynamin-related protein 1 has membrane constricting and severing abilities sufficient for mitochondrial and peroxisomal fission
Drp1 and Dnm2 have been implicated in mitochondrial fission events, although their specific activities in constriction and scission have been unclear. Here, the authors demonstrate that Drp1 is sufficient to constrict and sever mitochondrial and peroxisomal membranes in the absence of Dnm proteins.
- Sukrut C. Kamerkar
- , Felix Kraus
- & Michael T. Ryan
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Article
| Open AccessATP-dependent membrane remodeling links EHD1 functions to endocytic recycling
The GTPase dynamin catalyzes membrane fission but activity of the dynamin-related ATPase EHD1 is unknown. Here, using in vitro reconstitution assays and molecular dynamics simulations, the authors report that EHD1 hydrolyzes ATP to remodel, causing fission of membrane tubes and that this is necessary for endocytic recycling.
- Raunaq Deo
- , Manish S. Kushwah
- & Thomas J. Pucadyil
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Article
| Open AccessThe AFF-1 exoplasmic fusogen is required for endocytic scission and seamless tube elongation
Membrane fusion and fission events at exoplasmic membrane surfaces are not well understood. Here the authors show that the C. elegans cell–cell fusogen AFF-1 is required for endocytic scission and apically-directed membrane trafficking during the development of a unicellular tube.
- Fabien Soulavie
- , David H. Hall
- & Meera V. Sundaram
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Article
| Open AccessCoupling fission and exit of RAB6 vesicles at Golgi hotspots through kinesin-myosin interactions
Actin and microtubules play important roles in Golgi structure and function but how they are connected is poorly understood. Here the authors show that KIF20A is involved in the fission process and, in association with Myosin II, serves to anchor RAB6 on Golgi/TGN membranes near microtubules nucleating sites.
- Stéphanie Miserey-Lenkei
- , Hugo Bousquet
- & Bruno Goud
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Article
| Open AccessLipid-mediated PX-BAR domain recruitment couples local membrane constriction to endocytic vesicle fission
The spatiotemporal regulation of membrane scaffolds recruitment and coupling between membrane deformation and fission in endocytosis are unclear. Here the authors show that lipid conversion at endocytic pits recruits SNX9, which couples local membrane constriction to fission in endocytosis.
- Johannes Schöneberg
- , Martin Lehmann
- & Frank Noé
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Article
| Open AccessConstriction of the mitochondrial inner compartment is a priming event for mitochondrial division
The role of morphological alterations in the mitochondrial inner-membrane in regulating mitochondrial division are unknown. Here, the authors describe spontaneous and repetitive constriction of the mitochondrial inner compartment, and suggest this acts as a priming event for efficient mitochondrial division.
- Bongki Cho
- , Hyo Min Cho
- & Woong Sun
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Article
| Open AccessGolgi membrane fission requires the CtBP1-S/BARS-induced activation of lysophosphatidic acid acyltransferase δ
CtBP1-S/BARS is required for fission of endomembrane compartments including the Golgi. Here the authors show that CtBP1-S/BARS activates a trans-Golgi lysophosphatidic acid acyltransferase that catalyses the production of phosphatidic acid and is required for fission of the post-Golgi carrier membrane.
- Alessandro Pagliuso
- , Carmen Valente
- & Alberto Luini
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Article
| Open AccessCross-membranes orchestrate compartmentalization and morphogenesis in Streptomyces
Streptomycetes are multicellular bacteria that grow as multinucleoid filaments with infrequent cross-walls. Here, the authors describe a membrane system that forms protein-impermeable barriers and compartmentalizes the multinucleoid filaments independently from the FtsZ-guided cell division machinery.
- Katherine Celler
- , Roman I. Koning
- & Gilles P. van Wezel