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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.
Publication : Environmental microbiology reports

A Gateway(®) -compatible bacterial adenylate cyclase-based two-hybrid system

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Environmental microbiology reports - 25 Nov 2013

Ouellette SP, Gauliard E, Antosová Z, Ladant D

Link to Pubmed [PMID] – 24983530

Environ Microbiol Rep 2014 Jun;6(3):259-67

The bacterial adenylate cyclase two-hybrid (BACTH) system has been widely used to characterize protein-protein interactions in the prokaryotic world. This system relies on the interaction-mediated reconstitution of adenylate cyclase activity in Escherichia coli by bringing together two complementary fragments of the catalytic domain of the adenylate cyclase toxin of Bordetella pertussis. A limiting factor in performing large-scale two-hybrid interaction screens with full-length open reading frames (ORFs) is the need to clone each ORF individually into the plasmids used to express the hybrid proteins. The Gateway(®) (GW) cloning system (Life Technologies, Grand Island, NY, USA) partially circumvents this limitation, and we describe here modifications to the BACTH system for compatibility with this recombineering technology. We validated and tested the functionality of the BACTH Gateway (BACTHGW ) system using several models of protein-protein interactions, focusing particularly on those involved in bacterial cell division. We further modified the BACTH plasmids to incorporate a transmembrane (TM) segment downstream of the cyclase fragments to permit analysis of extracytoplasmic protein interactions. This approach was also useful to identify putative TM segments and to experimentally validate bioinformatically identified TM domains. The BACTHGW system will prove a useful addition to the study of protein-protein interactions.

http://www.ncbi.nlm.nih.gov/pubmed/24983530