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Super-resolution imaging and estimation of protein copy numbers atsingle synapses with DNA-pointaccumulation for imaging innanoscale topography

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Hafner,  Anne-Sophie
Max Planck Institute for Brain Research, Max Planck Society;

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Endesfelder,  Ulrike
Max Planck Institute for Terrestrial Microbiology, Max Planck Society;

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Schuman,  Erin M.
Synaptic Plasticity Department, Max Planck Institute for Brain Research, Max Planck Society;

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Citation

Böger, C., Hafner, A.-S., Schlichthärle, T., Strauss, M. T., Malkusch, S., Endesfelder, U., et al. (2019). Super-resolution imaging and estimation of protein copy numbers atsingle synapses with DNA-pointaccumulation for imaging innanoscale topography. Neurophotonics, 6(3): 035008. doi:10.1117/1.NPh.6.3.035008.


Cite as: http://hdl.handle.net/21.11116/0000-0007-E05C-5
Abstract
In the brain, the strength of each individual synapse is defined by the complement of proteins present or the "local proteome." Activity-dependent changes in synaptic strength are the result of changes in this local proteome and posttranslational protein modifications. Although most synaptic proteins have been identified, we still know little about protein copy numbers in individual synapses and variations between synapses. We use DNA-point accumulation for imaging in nanoscale topography as a single-molecule super-resolution imaging technique to visualize and quantify protein copy numbers in single synapses. The imaging technique provides near-molecular spatial resolution, is unaffected by photobleaching, enables imaging of large field of views, and provides quantitative molecular information. We demonstrate these benefits by accessing copy numbers of surface AMPA-type receptors at single synapses of rat hippocampal neurons along dendritic segments.