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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 : Research in microbiology

Relief of catabolite repression in a cAMP-independent catabolite gene activator mutant of Escherichia coli

Team: Biochemistry of Macromolecular Interactions
Member: Daniel Ladant
Member: Archived: Agnès Ullmann
Member: Gouzel Karimova
Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Research in microbiology - 01 Mar 2004

Karimova G, Ladant D, Ullmann A

Link to Pubmed [PMID] – 14990258

Res. Microbiol. 2004 Mar;155(2):76-9

We isolated and characterized a new catabolite gene activator mutant (crp*) of Escherichia coli that confers cAMP-independent expression and total relief of catabolite repression of beta-galactosidase and tryptophanase synthesis. The two mutations responsible for this phenotype change the amino acids at codon 72 from Glu to Ala and at codon 144 from Ala to Thr in the corresponding CAP* protein.