Concept

Oligosaccharyltransférase

Publications associées (18)

alpha-Synuclein O-GlcNAcylation alters aggregation and toxicity, revealing certain residues as potential inhibitors of Parkinson's disease

A compelling link is emerging between the posttranslational modification O-GlcNAc and protein aggregation. A prime example is alpha-synuclein, which forms toxic aggregates that are associated with neurodegeneration in Parkinson's and related diseases. alph ...

NATL ACAD SCIENCES2019

Evolution of an intricate J-protein network driving protein disaggregation in eukaryotes

Paolo De Los Rios, Alessandro Barducci, Duccio Malinverni

Hsp70 participates in a broad spectrum of protein folding processes extending from nascent chain folding to protein disaggregation. This versatility in function is achieved through a diverse family of J-protein cochaperones that select substrates for Hsp70 ...

Elife Sciences Publications Ltd2017

Production of active glycosylation-deficient gamma-secretase complex for crystallization studies

Florian Maria Wurm, David Hacker, Virginie Sandra Braman, Patrick Fraering, Mitko Dimitrov, Hermeto Gerber, Andres Ricardo Lopez Robles

Alzheimer's disease (AD)-associated gamma-secretase is a ubiquitously expressed multi-subunit protease complex embedded in the lipid bilayer of cellular compartments including endosomes and the plasma membrane. Although gamma-secretase is of crucial intere ...

Wiley-Blackwell2015

N-linked sugar-regulated protein folding and quality control in the ER

Maurizio Molinari

Asparagine-linked glycans (N-glycans) are displayed on the majority of proteins synthesized in the endoplasmic reticulum (ER). Removal of the outermost glucose residue recruits the lectin chaperone malectin possibly involved in a first triage of defective ...

Academic Press Ltd- Elsevier Science Ltd2015

Establishing the Catalytic Mechanism of Human Pancreatic α-Amylase with QM/MM Methods

Marta Andreia Da Silva Perez

In this work, we studied the catalytic mechanism of human pancreatic α-amylase (HPA). Our goal was to determine the catalytic mechanism of HPA with atomic detail using computational methods. We demonstrated that the HPA catalytic mechanism consists of two ...

2015

Flagging and docking: dual roles for N-glycans in protein quality control and cellular proteostasis

Maurizio Molinari

Nascent polypeptides entering the endoplasmic reticulum (ER) are covalently modified with pre-assembled oligosaccharides. The terminal glucose and mannose residues are immediately removed after transfer of the oligosaccharide onto newly synthesized polypep ...

Elsevier Science London2012

Palmitoylated calnexin is a key component of the ribosome-translocon complex

Françoise Gisou van der Goot Grunberg, Matteo Dal Peraro, Laurence Gouzi Abrami, Béatrice Kunz, Thomas Lemmin, Sanja Blaskovic

A third of the human genome encodes N-glycosylated proteins. These are co-translationally translocated into the lumen/membrane of the endoplasmic reticulum (ER) where they fold and assemble before they are transported to their final destination. Here, we s ...

2012

The Lipopolysaccharide from Capnocytophaga canimorsus Reveals an Unexpected Role of the Core-Oligosaccharide in MD-2 Binding

Matteo Dal Peraro, Marco Stenta

Capnocytophaga canimorsus is a usual member of dog's mouths flora that causes rare but dramatic human infections after dog bites. We determined the structure of C. canimorsus lipid A. The main features are that it is penta-acylated and composed of a "hybri ...

2012

Folding and Structure of the Pore Forming Toxin Aerolysin

Mircea Ioan Iacovache

The first obstacle encountered by a bacterial pathogen once inside the host is the plasma membrane surrounding the target cells. Throughout evolution bacteria has acquired and maintained genes that upon stimulation express proteins capable of damaging the ...

EPFL2011

Tandem O-18 Stable Isotope Labeling for Quantification of N-Glycoproteome

Liang Qiao

A new strategy using tandem 18O stable isotope labeling (TOSIL) to quantify the N-glycosylation site occupancy is reported. Three heavy oxygen atoms are introduced into N-glycosylated peptides: two 18O atoms are incorporated into the carboxyl terminal of a ...

American Chemical Society2010

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