Multimerized GFP probe for live cell imaging

项目摘要 荧光信号水平、光漂白和光毒性是生物医学中普遍遇到的主要问题。 实时荧光显微镜应用。由于荧光信号的有限性， 活细胞对现有的荧光显微技术提出了重大挑战。不仅低信号 水平影响检测精度超过自发荧光背景，相关的光漂白和 光毒性也限制了时间分辨率和观察持续时间。受最近事态发展的启发 的SunTag，我们建议开发一个蛋白质标记计划使用分裂荧光蛋白。通过安排 将它们放入串联阵列中，并证明了成比例的信号放大。这种信号放大不能 不仅解决了信号强度的挑战，而且通过相应地减少光漂白/光毒性， 降低激发强度。具体来说，我们计划开发用于荧光成像的分裂FP标签，并应用于 它可以用于染色体组织的活细胞成像。

Project Summary Fluorescence signal level, photobleaching and phototoxicity are major problems encountered ubiquitously in live fluorescence microscopy applications. Because of limited of fluorophore signals, long term monitoring of live cells presents a major challenge to existing fluorescent microscopy technologies. Not only does low signal level affect detection precision over the auto-fluorescence background, the associated photobleaching and phototoxicity also restrict the temporal resolution and observation duration. Inspired by the recent development of the SunTag, we propose to develop a protein labeling scheme using split-fluorescent proteins. By arranged them into tandem arrays and demonstrated proportional signal amplification. This signal amplification can not only solve the signal strength challenge, but also reduce photobleaching / phototoxicity by correspondingly lowering the excitation intensity. Specifically, we plan to develop split-FP tags for multicolor imaging and apply it to live cell imaging of chromosome organization.