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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 : Toxicon : official journal of the International Society on Toxinology

ExoY, an actin-activated nucleotidyl cyclase toxin from P. aeruginosa: A minireview

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Toxicon : official journal of the International Society on Toxinology - 16 Dec 2017

Belyy A, Mechold U, Renault L, Ladant D

Link to Pubmed [PMID] – 29258848

Toxicon 2018 Jul;149:65-71

ExoY est l’un des quatre effecteurs du système de sécrétion de Pseudomonas aeruginosa de type 3 (T3SS) bien caractérisés. Il s’agit d’une toxine de nucléotidyl cyclase qui est inactive à l’intérieur des bactéries, mais qui devient puissamment activée une fois qu’elle est délivrée dans les cellules cibles eucaryotes. Récemment, l’actine filamenteuse a été identifiée comme le cofacteur eucaryote qui stimule spécifiquement l’activité enzymatique ExoY de plusieurs ordres de grandeur. Dans cette revue, nous discutons des avancées récentes dans la compréhension de la biochimie de l’activité nucléotidyl cyclase d’ExoY et de sa régulation par interaction avec l’actine filamenteuse.