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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 : Analytical biochemistry

Use of protein biotinylation in vivo for chromatin immunoprecipitation

Team: Biochemistry of Macromolecular Interactions
Member: Undine Mechold
Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Analytical biochemistry - 01 Feb 2004

Viens A, Mechold U, Lehrmann H, Harel-Bellan A, Ogryzko V

Link to Pubmed [PMID] – 14715286

Anal. Biochem. 2004 Feb;325(1):68-76

We describe a system designed to express biotinylated proteins in mammalian cells in vivo and its application to the study of protein-DNA interactions in vivo by chromatin immunoprecipitation (ChIP). The system is based on coexpression of the target protein fused to a short biotin acceptor domain together with the biotinylating enzyme BirA from Escherichia coli. The superior strength of the biotin-avidin interaction allows one to employ more stringent washing conditions in the ChIP protocol, resulting in a better signal/noise ratio.