Local cortical pulling-force repression switches centrosomal centration and posterior displacement in C. elegans. Export

@article{citeulike:3336260, abstract = {Centrosome positioning is actively regulated by forces acting on microtubules radiating from the centrosomes. Two mechanisms, center-directed and polarized cortical pulling, are major contributors to the successive centering and posteriorly displacing migrations of the centrosomes in single-cell-stage Caenorhabditis elegans. In this study, we analyze the spatial distribution of the forces acting on the centrosomes to examine the mechanism that switches centrosomal migration from centering to displacing. We clarify the spatial distribution of the forces using image processing to measure the micrometer-scale movements of the centrosomes. The changes in distribution show that polarized cortical pulling functions during centering migration. The polarized cortical pulling force directed posteriorly is repressed predominantly in the lateral regions during centering migration and is derepressed during posteriorly displacing migration. Computer simulations show that this local repression of cortical pulling force is sufficient for switching between centering and displacing migration. Local regulation of cortical pulling might be a mechanism conserved for the precise temporal regulation of centrosomal dynamic positioning.}, author = {Kimura, A. and Onami, S.}, citeulike-article-id = {3336260}, citeulike-linkout-0 = {http://dx.doi.org/10.1083/jcb.200706005}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/18158330}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=18158330}, citeulike-linkout-3 = {http://www.wormbase.org/db/misc/paper?name=WBPaper00031354}, doi = {10.1083/jcb.200706005}, journal = {J Cell Biol}, keywords = {c\_elegans, simulation, spindle}, pages = {1347--1354}, posted-at = {2008-11-25 13:19:46}, priority = {2}, title = {Local cortical pulling-force repression switches centrosomal centration and posterior displacement in C. elegans.}, url = {http://dx.doi.org/10.1083/jcb.200706005}, volume = {179}, year = {2007} }

TY - JOUR ID - citeulike:3336260 L3 - citeulike-article-id:3336260 N2 - Centrosome positioning is actively regulated by forces acting on microtubules radiating from the centrosomes. Two mechanisms, center-directed and polarized cortical pulling, are major contributors to the successive centering and posteriorly displacing migrations of the centrosomes in single-cell-stage Caenorhabditis elegans. In this study, we analyze the spatial distribution of the forces acting on the centrosomes to examine the mechanism that switches centrosomal migration from centering to displacing. We clarify the spatial distribution of the forces using image processing to measure the micrometer-scale movements of the centrosomes. The changes in distribution show that polarized cortical pulling functions during centering migration. The polarized cortical pulling force directed posteriorly is repressed predominantly in the lateral regions during centering migration and is derepressed during posteriorly displacing migration. Computer simulations show that this local repression of cortical pulling force is sufficient for switching between centering and displacing migration. Local regulation of cortical pulling might be a mechanism conserved for the precise temporal regulation of centrosomal dynamic positioning. JF - J Cell Biol EP - 1354 TI - Local cortical pulling-force repression switches centrosomal centration and posterior displacement in C. elegans. VL - 179 SP - 1347 KW - c_elegans KW - simulation KW - spindle AU - Kimura, A AU - Onami, S PY - 2007/// UR - http://dx.doi.org/10.1083/jcb.200706005 ER -