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© Sandrine Etienne-Manneville
Photo prise à l'avant (dans la protrusion) d'astrocytes primaires de rat en migration. Marquage par immunofluorescence montrant en rouge, p150 Glued, une protéine associée aux extrémités 'plus' des microtubules et en vert la tubuline des microtubules. La photographie montre l'accumulation de p150 Glued à l'avant des cellules en migration, où la protéine pourrait participer à l'ancrage des microtubules à la membrane plasmique. Pour essayer de corriger, les dérèglements observés lors de la migration des cellules d'astrocytes tumuraux ou gliomes on cherche à connaitre les mécanismes moléculaires fondamentaux qui controlent la polarisation et la migration cellulaires.

Projects

Project
Ongoing
11 Members

Detection and countermeasures against bacterial toxins

Emmanuel Lemichez (PI)

Bacterial protein toxins are molecular nanodevices endowed with the capacity of inducing host specific unparalleled pathophysiological effects. Therefore, major challenges in toxinology include the development of countermeasures other than vaccination against bacterial protein toxins […]
Project
Ongoing
8 Members

Biophysical characterization of the translocation process of Bordetella pertussis adenylate cyclase toxin CyaA

Alexandre Chenal (PI)

This project aims to describe the hydrodynamic and thermodynamic properties of the CyaA toxin and the conformational changes it undergoes during its translocation process across the lipid membranes of Bordetella pertussis (secretion) and of […]
Project
Ongoing
15 Members

Molecular crowding

Alexandre Chenal (PI)

We are interested in investigating the effects of molecular crowding, i.e., excluded volume effects, mimicking the effects of high concentrations of macromolecular solutes found in biological fluids on biochemical properties of proteins. In particular, […]
Project
Ongoing
8 Members

Clinical development of cancer vaccines

Claude Leclerc (PI)

CyaA-based therapeutic cancer vaccines Based on our discovery that a bacterial protein, the adenylate cyclase (CyaA), binds to dendritic cells (DCs), we have developed a highly efficient vector capable of targeting a wide range […]
Project
Ongoing
26 Members

CyaA secretion, folding and translocation across membrane

Alexandre Chenal (PI)

CyaA, a 1706 residue-long protein, is one of the major virulence factors produced by B. pertussis and plays an important role in the early stages of respiratory tract colonization. This toxin uses an original […]
Project
Ongoing
6 Members

Regulatory roles of signaling Nucleotides

Undine Mechold (PI)

  Other research projects are aimed at exploring the regulatory role of different nucleotides such ppGpp and pppGpp that are both thought to act as second messengers in many complex cellular responses to nutritional […]
Project
ongoing
1 Member

In vivo analysis of protein-protein interactions

Daniel Ladant (PI)

  A second main line of research of the team is focused on the characterization of protein-protein interactions by exploiting a bacterial two-hybrid screening technology (BACTH) that we have previously developed (Karimova et al., […]
Project
ongoing
1 Member

Recombinant CyaA toxin as an innovative vaccine vehicle

Daniel Ladant (PI)

  From an applied perspective, we have shown in collaboration with the team of C. Leclerc, (Immune Regulation and Vaccinology, Institut Pasteur) that CyaA can be engineered to serve as a potent non-replicating vector […]
Project
ongoing
1 Member

Structure-function studies of the CyaA toxin

Daniel Ladant (PI)

  The CyaA toxin is a 1706 residues-long bifunctional protein (Figure 1): the calmodulin-activated, catalytic domain is located in the 400 amino-proximal residues, whereas the carboxy-terminal 1306 residues are responsible for the binding of […]

Publications

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