Schlett Katalin
Department of Physiology and Neurobiology, Eötvös Loránd University, Budapest, Hungary
MTA-ELTE-NAP B-Neuronal Cell Biology Research Group, Eötvös Loránd University, Budapest, Hungary.
J Cell Biol. 2017 Aug 7;216(8):2255-2257. doi: 10.1083/jcb.201705216. Epub 2017 Jul 12.
Synaptic activity reshapes the morphology of dendritic spines via regulating F-actin arborization. In this issue, Lei et al. (2017. https://doi.org/10.1083/jcb.201612042) reports a novel, G-actin-dependent regulation of actin polymerization within spine heads. They show that actin monomer levels are elevated in spines upon activity, with G-actin immobilized by the local enrichment of phosphatidylinositol (3,4,5)-triphosphate (PIP) within the spine plasma membrane.
突触活动通过调节F-肌动蛋白的分支来重塑树突棘的形态。在本期中,雷等人(2017年。https://doi.org/10.1083/jcb.201612042)报道了一种新的、依赖于G-肌动蛋白的棘突头部肌动蛋白聚合调节机制。他们发现,活动时棘突中的肌动蛋白单体水平会升高,G-肌动蛋白通过磷脂酰肌醇(3,4,5)-三磷酸(PIP)在棘突质膜内的局部富集而固定。