Anass Chiki

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Related publications (22)

Site-Specific Phosphorylation of Huntingtin Exon 1 Recombinant Proteins Enabled by the Discovery of Novel Kinases

Hilal Lashuel, Luciano Andres Abriata, Jonathan Jean-Pierre Ricci, Anass Chiki, Andreas Reif, Ramanath Narayana Hegde, Driss Boudeffa

Post-translational modifications (PTMs) within the first 17 amino acids (Nt17) of exon 1 of the Huntingtin protein (Httex1) play important roles in modulating its cellular properties and functions in health and disease. In particular, phosphorylation of th ...

2020

Unraveling the complexity of amyloid polymorphism using gold nanoparticles and cryo-EM

Francesco Stellacci, Hilal Lashuel, Nadine Aït Bouziad, Paulo Henrique Jacob Silva, Anass Chiki, Zekiye Pelin Güven, Urszula Beata Cendrowska, Sophie Vieweg, Marie Mueller

Increasing evidence suggests that amyloid polymorphism gives rise to different strains of amyloids with distinct toxicities and pathology-spreading properties. Validating this hypothesis is challenging due to a lack of tools and methods that allow for the ...

National Academy of Sciences2020

Extent of N-terminus exposure of monomeric alpha-synuclein determines its aggregation propensity

Hilal Lashuel, Anass Chiki

As an intrinsically disordered protein, monomeric alpha-synuclein (aSyn) occupies a large conformational space. Certain conformations lead to aggregation prone and non-aggregation prone intermediates, but identifying these within the dynamic ensemble of mo ...

Nature Research2020

Development of novel methods and tools to decipher the huntingtin post-translation modifications code

Anass Chiki

Huntington's disease (HD) is a fatal genetic neurodegenerative disorder caused by a CAG repeat expansion in the Huntingtin gene of more than 36 repeats. This repeat is translated into a polyglutamine (polyQ) stretch within the first exon-encoded region of ...

EPFL2020

Phosphorylation of the overlooked tyrosine 310 regulates the structure, aggregation, and microtubule- and lipid-binding properties of Tau

Hilal Lashuel, Nadine Aït Bouziad, Anass Chiki, Galina Limorenko

The microtubule-associated protein Tau is implicated in the pathogenesis of several neurodegenerative disorders, including Alzheimer's disease. Increasing evidence suggests that post-translational modifications play critical roles in regulating Tau's norma ...

2020

Chronic corticosterone aggravates behavioral and neuronal symptomatology in a mouse model of alpha-synuclein pathology

Maria del Carmen Sandi Perez, Hilal Lashuel, Johannes Burtscher, Anass Chiki, João Pedro de Matos Rodrigues, Jean-Christophe Copin

Debilitating, yet underinvestigated nonmotor symptoms related to mood/emotion, such as depression, are common in Parkinson's disease. Here, we explore the role of depression and of the amygdala, a brain region robustly linked to mood/emotion, in synucleino ...

2019

N-terminal Huntingtin (Htt) phosphorylation is a molecular switch regulating Htt aggregation, helical conformation, internalization, and nuclear targeting

Giovanni Dietler, Hilal Lashuel, Francesco Simone Ruggeri, Anass Chiki, Mohamed Bilal Fares, Sean Michael Deguire, Urszula Beata Cendrowska

American Society for Biochemistry and Molecular Biology Inc.2018

Generation of Native, Untagged Huntingtin Exon1 Monomer and Fibrils Using a SUMO Fusion Strategy

Hilal Lashuel, Jonathan Jean-Pierre Ricci, Anass Chiki, Andreas Reif

Huntington’s Disease (HD) is an inherited fatal neurodegenerative disease caused by a CAG expansion (36) in the first exon of the HD gene, resulting in the expression of the Huntingtin protein (Htt) or N-terminal fragments thereof with an expanded polygl ...

2018

Exploring the role of post-translational modifications in regulating α-synuclein interactions by studying the effects of phosphorylation on nanobody binding

Hilal Lashuel, Juan Kiwi, Bruno Claude Daniel Fauvet, Anass Chiki, Farah El Turk

Intracellular deposits of α-synuclein in the form of Lewy bodies are major hallmarks of Parkinson’s disease (PD) and a range of related neurodegenerative disorders. Post-translational modifications (PTMs) of α-synuclein are increasingly thought to be major ...

2018

Mutant Exon1 Huntingtin Aggregation is Regulated by T3 Phosphorylation-Induced Structural Changes and Crosstalk between T3 Phosphorylation and Acetylation at K6

Giovanni Dietler, Hilal Lashuel, Anass Chiki, Francesco Simone Ruggeri, Urszula Beata Cendrowska, Annalisa Ansaloni, Ritwik Burai, Sean Michael Deguire, Sophie Vieweg

Herein, we used protein semisynthesis to investigate, for the first time, the effect of lysine acetylation and phosphorylation, as well as the crosstalk between these modifications on the structure and aggregation of mutant huntingtin exon1 (Httex1). Our r ...

Wiley-Blackwell2017

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