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Concept

Membrane contact site

Publications associées (19)

S-acylation and lipid exchange at the ER-Golgi membrane contact sites regulate pathogen entry in human cells

Muhammad Umair Anwar

Cells have evolved endocytic pathways to internalize different molecules, to regulate intra-cellular communication and their interaction with external environment. Pathogens have co-evolved with cells to exploit these processes for infections. In particula ...

EPFL2024

Modular segmentation, spatial analysis and visualization of volume electron microscopy datasets

Martin Weigert

Volume electron microscopy is the method of choice for the in situ interrogation of cellular ultrastructure at the nanometer scale, and with the increase in large raw image datasets generated, improving computational strategies for image segmentation and s ...

Nature Portfolio2024

Simultaneous membrane and RNA binding by Tick-Borne Encephalitis Virus capsid protein

Sarah Victoria Barrass

Tick-borne encephalitis virus is an enveloped, pathogenic, RNA virus in the family Flaviviridae, genus Flavivirus. Viral particles are formed when the nucleocapsid, consisting of an RNA genome and multiple copies of the capsid protein, buds through the end ...

PUBLIC LIBRARY SCIENCE2023

Mammalian membrane trafficking as seen through the lens of bacterial toxins

Françoise Gisou van der Goot Grunberg, Francisco De Magalhães Sarmento Ribeiro De Mesquita, Oksana Andrei Sergeeva

A fundamental question of eukaryotic cell biology is how membrane organelles are organised and interact with each other. Cell biologists address these questions by characterising the structural features of membrane compartments and the mechanisms that coor ...

WILEY2020

Thioredoxin-Related Transmembrane Proteins: TMX1 and Little Brothers TMX2, TMX3, TMX4 and TMX5

Maurizio Molinari

The endoplasmic reticulum (ER) is site of synthesis and maturation of membrane and secretory proteins in eukaryotic cells. The ER contains more than 20 members of the Protein Disulfide Isomerase (PDI) family. These enzymes regulate formation, isomerization ...

2020

Proteasomal and lysosomal clearance of faulty secretory proteins: ER-associated degradation (ERAD) and ER-to-lysosome-associated degradation (ERLAD) pathways

Maurizio Molinari

About 40% of the eukaryotic cell's proteins are inserted co- or post-translationally in the endoplasmic reticulum (ER), where they attain the native structure under the assistance of resident molecular chaperones and folding enzymes. Subsequently, these pr ...

2019

Mechanosensitive Fluorescent Probes to Image Membrane Tension in Mitochondria, Endoplasmic Reticulum, and Lysosomes

Suliana Manley, Dora Mahecic

Measuring forces inside cells is particularly challenging. With the development of quantitative microscopy, fluorophores which allow the measurement of forces became highly desirable. We have previously introduced a mechanosensitive flipper probe, which re ...

AMER CHEMICAL SOC2019

Lipid exchange and signaling at ER–Golgi contact sites

Meticulous observations of the cell perinuclear region where the Golgi and the endoplasmic reticulum (ER) networks intermingle have revealed close contact sites of barely 20 nm between these two organelles. Recent studies demonstrate that molecular machine ...

2018

An overview of cellular ultrastructure in benthic foraminifera: New observations of rotalid species in the context of existing literature

Anders Meibom, Emmanuelle Geslin, Charlotte Madeleine Nicole Lekieffre

We report systematic transmission electron microscope (TEM) observations of the cellular ultrastructure of selected, small rotalid benthic foraminifera. Nine species from different environments (intertidal mudflat, fjord, and basin) were investigated: Ammo ...

2018

Exploring dynamic organellar shape using live-cell fluorescence super-resolution microscopy

Lina Carlini

Eukaryotic cells contain membrane-bound organelles, that perform specialized tasks, which control cellular fate. Organelles are dynamic and contain nanometre-scale, ultrastructural features; in fact, their shape and function are interconnected. Thus, there ...

EPFL2016

Compartmentalization of GABA synthesis by GAD67 differs between pancreatic beta cells and neurons

Chiara Cianciaruso, Edward Allen Phelps, Steinunn Baekkeskov Hanahan

The inhibitory neurotransmitter GABA is synthesized by the enzyme glutamic acid decarboxylase (GAD) in neurons and in pancreatic β-cells in islets of Langerhans where it functions as a paracrine and autocrine signaling molecule regulating the function of i ...

Public Library of Science2015

Division of labor among oxidoreductases: TMX1 preferentially acts on transmembrane polypeptides

Maurizio Molinari

The endoplasmic reticulum (ER) is the site of maturation for secretory and membrane proteins in eukaryotic cells. The lumen of the mammalian ER contains >20 members of the protein disulfide isomerase (PDI) superfamily, which ensure formation of the correct ...

Amer Soc Cell Biology2015

Close Encounter of the Third Kind: The ER Meets Endosomes at Fission Sites

Françoise Gisou van der Goot Grunberg

The endoplasmic reticulum (ER) forms functional contacts with several cellular organelles and regulates processes such as mitochondrial fission. In a recent issue of Cell, Rowland et al. (2014) extend these findings to endosomes, showing that the ER contac ...

Cell Press - Elsevier2014

In situ structural analysis of the Yersinia enterocolitica injectisome

Matteo Dal Peraro, Henning Paul-Julius Stahlberg, Marco Stenta, Matteo Thomas Degiacomi

Injectisomes are multi-protein transmembrane machines allowing pathogenic bacteria to inject effector proteins into eukaryotic host cells, a process called type III secretion. Here we present the first three-dimensional structure of Yersinia enterocolitica ...

Elife Sciences Publications Ltd2013

Connecting vesicular transport with lipid synthesis: FAPP2

Giovanni D'Angelo

Next to the protein-based machineries composed of small G-proteins, coat complexes, SNAREs and tethering factors, the lipid-based machineries are emerging as important players in membrane trafficking. As a component of these machineries, lipid transfer pro ...

2012

ERAD and ERAD tuning: disposal of cargo and of ERAD regulators from the mammalian ER

Maurizio Molinari

The endoplasmic reticulum (ER) is the site of maturation for secretory and membrane proteins in eukaryotic cells. Unsuccessful folding attempts are eventually interrupted and most folding-defective polypeptides are dislocated across the ER membrane and deg ...

2011

Identification and characterization of proteins supporting dehalorespiration in Desulfitobacterium hafniense strain TCE1

Respiration is a fundamental catalytic process in the aerobic and anaerobic energy metabolism of many prokaryotic and most eukaryotic organisms. The major difference between these organisms is that various organic and inorganic substrates can be used to do ...

EPFL2009

A palmitoylation cycle dynamically regulates partitioning of the GABA-synthesizing enzyme GAD65 between ER-Golgi and post-Golgi membranes

Steinunn Baekkeskov Hanahan

GAD65, the smaller isoform of the enzyme glutamic acid decarboxylase, synthesizes GABA for fine-tuning of inhibitory neurotransmission. GAD65 is synthesized as a soluble hydrophilic protein but undergoes a hydrophobic post-translational modification and be ...

Company of Biologists2008

Miniaturized bioanalytics to probe the function of membrane proteins

G-protein coupled receptors (GPCRs) are the most abundant class of proteins in the cell body. Such receptors are of major interest as potential therapeutic targets. Downscaling and parallelization of bioanalytics opens novel routes to rapidly screen and id ...

EPFL2008