한빛사논문, 상위피인용논문
Abstract
Jinhyun Kim1,2,5, Ting Zhao1,3,5, Ronald S Petralia4, Yang Yu1, Hanchuan Peng1, Eugene Myers1 & Jeffrey C Magee1
1Janelia Farm Research Campus, Howard Hughes Medical Institute, Ashburn, Virginia, USA. 2Center for Functional Connectomics, Korea Institute of Science and Technology, Seoul, Korea. 3Qiushi Academy for Advanced Studies, Zhejiang University, Hangzhou, China. 4National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, Maryland, USA. 5These authors contributed equally to this work. Correspondence should be addressed to J.K. and J.C.M.
The GFP reconstitution across synaptic partners (GRASP) technique, based on functional complementation between two nonfluorescent GFP fragments, can be used to detect the location of synapses quickly, accurately and with high spatial resolution. The method has been previously applied in the nematode and the fruit fly but requires substantial modification for use in the mammalian brain. We developed mammalian GRASP (mGRASP) by optimizing transmembrane split-GFP carriers for mammalian synapses. Using in silico protein design, we engineered chimeric synaptic mGRASP fragments that were efficiently delivered to synaptic locations and reconstituted GFP fluorescence in vivo. Furthermore, by integrating molecular and cellular approaches with a computational strategy for the three-dimensional reconstruction of neurons, we applied mGRASP to both long-range circuits and local microcircuits in the mouse hippocampus and thalamocortical regions, analyzing synaptic distribution in single neurons and in dendritic compartments.
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