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© Emeline Camand
Marquage par immunofluorescence d'astrocytes tumoraux ou astrocytomes (lignée cellulaire humaine U373), montrant en rouge, APC et en vert, la tubuline des microtubules. APC est un supresseur de tumeur qui est impliqué dans la polarisation des astrocytes normaux. La localisation d'APC est altérée dans des lignées de gliomes. 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 cellulaire.
Publication : Physical review letters

Collective behavior of antagonistically acting kinesin-1 motors

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Physical review letters - 17 Sep 2010

Leduc C, Pavin N, Jülicher F, Diez S

Link to Pubmed [PMID] – 20867677

Phys. Rev. Lett. 2010 Sep;105(12):128103

In many subcellular force-generating systems, groups of motor proteins act antagonistically. Here, we present an experimental study of the tug of war between superprocessive kinesin-1 motors acting on antiparallel microtubule doublets in vitro. We found distinct modes of slow and fast movements, as well as sharp transitions between these modes and regions of coexistence. We compare our experimental results to a quantitative theory based on the physical properties of individual motors. Our results show that mechanical interactions between motors can collectively generate coexisting transport regimes with distinct velocities.

http://www.ncbi.nlm.nih.gov/pubmed/20867677