Concept

Agrégation des protéines

Publications associées (213)

Stringent requirement for HRD1, SEL1L, and OS-9/XTP3-B for disposal of ERAD-L-S substrates

Sophisticated quality control mechanisms prolong retention of protein-folding intermediates in the endoplasmic reticulum (ER) until maturation while sorting out terminally misfolded polypeptides for ER-associated degradation (ERAD). The presence of structu ...

2010

Stable -Synuclein Oligomers Strongly Inhibit Chaperone Activity of the Hsp70 System by Weak Interactions with J-domain Co-chaperones

Giovanni Dietler, Hilal Lashuel, Mounir Driss Mensi, Pierre Goloubinoff

alpha-Synuclein aggregation and accumulation in Lewy bodies are implicated in progressive loss of dopaminergic neurons in Parkinson disease and related disorders. In neurons, the Hsp70s and their Hsp40-like J-domain co-chaperones are the only known compone ...

2010

1) Trace copper(II) or zinc(II) ions drastically modify the aggregation behaviour of Aβ1–42: an AFM study

Angela Casini, Andrea Innocenti Malini

Formation of amyloid-beta (A beta)(1-42) amyloid fibrils, a characteristic feature of Alzheimer's disease (AD), was monitored in situ through atomic force microscopy (AFM). Well-structured amyloid fibrils slowly formed in solution within 24 hours for which ...

2010

The anti-Parkinsonian drug selegiline delays the nucleation phase of α-synuclein aggregation leading to the formation of nontoxic species

Hilal Lashuel, Saviana Di Giovanni

Parkinson's disease (PD) is a movement disorder characterized by the loss of dopaminergic neurons in the substantia nigra and the formation of intraneuronal inclusions called Lewy bodies, which are composed mainly of α-synuclein (α-syn). Selegiline (Sel) i ...

2010

Amyloidogenic protein-membrane interactions: mechanistic insight from model systems

Hilal Lashuel

The toxicity of amyloid-forming proteins is correlated with their interactions with cell membranes. Binding events between amyloidogenic proteins and membranes result in mutually disruptive structural perturbations, which are associated with toxicity. Memb ...

2010

Inertial effects in diffusion-limited reactions

Nicolas Dorsaz, Giuseppe Foffi, Francesco Piazza

Diffusion-limited reactions are commonly found in biochemical processes such as enzyme catalysis, colloid and protein aggregation and binding between different macromolecules in cells. Usually, such reactions are modeled within the Smoluchowski framework b ...

Institute of Physics2010

Selective Visualization of Fluorescent Sterols in Caenorhabditis elegans by Bleach-Rate-Based Image Segmentation

Daniel Sage

The nematode Caenorhabditis elegans is a genetically tractable model organism to investigate sterol transport. In vivo imaging of the fluorescent sterol, dehydroergosterol (DHE), is challenged by C. elegans' high autofluorescence in the same spectral regio ...

Wiley InterScience2010

Entacapone and tolcapone, two catechol O-methyltransferase inhibitors, block fibril formation of alpha-synuclein and beta-amyloid and protect against amyloid-induced toxicity

Hilal Lashuel, Pierre-Alain Carrupt, Magdalena Zweckstetter, Saviana Di Giovanni, Simona Eleuteri

Parkinson disease (PD) is the second most common neurodegenerative disorder after Alzheimer disease (AD). There is considerable consensus that the increased production and/or aggregation of alpha-synuclein (alpha-syn) plays a central role in the pathogenes ...

American Society for Biochemistry and Molecular Biology2010

N-glycan structures: recognition and processing in the ER

Maurizio Molinari, Riccardo Bernasconi

The processing of Winked glycans determines secretory protein homeostasis in the eukaryotic cell. Folding and degradation of glycoproteins in the endoplasmic reticulum (ER) are regulated by molecular chaperones and enzymes recruited by specific oligosaccha ...

2010

Molecular Simulation of the Effect of Cholesterol on Lipid-Mediated Protein-Protein Interactions

Berend Smit

Experiments and molecular simulations have shown that the hydrophobic mismatch between proteins and membranes contributes significantly to lipid-mediated protein-protein interactions. In this article, we discuss the effect of cholesterol on lipid-mediated ...

2010

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