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High-throughput fluorescence correlation spectroscopy enables dynamic molecular mechanisms of proteomics in living cells

High-throughput fluorescence correlation spectroscopy enables dynamic molecular mechanisms of proteomics in living cells

(Summary description)Jan Ellenberg's group at the European Molecular Biology Laboratory has developed a high-throughput fluorescence correlation spectroscopy (HT-FCS) technique to study the dynamics of protein molecular networks in living cells. motility, interactions, etc. The manual data collection and analysis methods of traditional FCS experiments are only suitable for analyzing the properties of a few target molecules in a few cells in a relatively short period of time. The HT-FCS technology developed by the authors of this thesis enables automatic screening of target cells and automatic acquisition and analysis of fluorescence autocorrelation (FACS) and cross-correlation (FCCS) spectral data at characteristic spatial loci and time points of individual living cells. Applying HT-FCS technology, the research team has performed 60,000 FCS experiments in 10,000 human-derived cells and analyzed the dynamic molecular mechanisms of 53 cellular nuclear proteins. Based on the multiple experimental parameters (concentration, motility, interactions, etc.) obtained from the FCS experiments, these nuclear proteins can be classified into three categories based on their binding to chromatin: 1) nuclear proteins bound to histones to form chromatin complexes; 2) nuclear proteins not bound to chromatin; and nuclear proteins forming molecular complexes of uneven size but not bound to chromatin. In addition, the dynamic changes of Aurora B Kinase and INCENP protein molecules during mitosis were investigated by HT-FCS technique, and Aurora B Kinase and INCENP are crucial for the regulation of chromatin mobile complex (CPC) formation. HT-FCS technology is important for the study of dynamic molecular mechanisms in living cells and drug discovery.

High-throughput fluorescence correlation spectroscopy enables dynamic molecular mechanisms of proteomics in living cells

(Summary description)Jan Ellenberg's group at the European Molecular Biology Laboratory has developed a high-throughput fluorescence correlation spectroscopy (HT-FCS) technique to study the dynamics of protein molecular networks in living cells. motility, interactions, etc. The manual data collection and analysis methods of traditional FCS experiments are only suitable for analyzing the properties of a few target molecules in a few cells in a relatively short period of time. The HT-FCS technology developed by the authors of this thesis enables automatic screening of target cells and automatic acquisition and analysis of fluorescence autocorrelation (FACS) and cross-correlation (FCCS) spectral data at characteristic spatial loci and time points of individual living cells. Applying HT-FCS technology, the research team has performed 60,000 FCS experiments in 10,000 human-derived cells and analyzed the dynamic molecular mechanisms of 53 cellular nuclear proteins. Based on the multiple experimental parameters (concentration, motility, interactions, etc.) obtained from the FCS experiments, these nuclear proteins can be classified into three categories based on their binding to chromatin: 1) nuclear proteins bound to histones to form chromatin complexes; 2) nuclear proteins not bound to chromatin; and nuclear proteins forming molecular complexes of uneven size but not bound to chromatin. In addition, the dynamic changes of Aurora B Kinase and INCENP protein molecules during mitosis were investigated by HT-FCS technique, and Aurora B Kinase and INCENP are crucial for the regulation of chromatin mobile complex (CPC) formation. HT-FCS technology is important for the study of dynamic molecular mechanisms in living cells and drug discovery.

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Abstract
To understand the function of cellular protein networks, spatial and temporal context is essential. Fluorescence correlation spectroscopy (FCS) is a single-molecule method to study the abundance, mobility and interactions of fluorescence-labeled biomolecules in living cells. However, manual acquisition and analysis procedures have restricted live-cell FCS to short-term experiments of a few proteins. Here, we present high-throughput (HT)-FCS, which automates screening and time-lapse acquisition of FCS data at specific subcellular locations and subsequent data analysis1,2. We demonstrate its utility by studying the dynamics of 53 nuclear proteins3,4. We made 60,000 measurements in 10,000 living human cells, to obtain biophysical parameters that allowed us to classify proteins according to their chromatin binding and complex formation. We also analyzed the cell-cycle-dependent dynamics of the mitotic kinase complex Aurora B/INCENP5 and showed how a rise in Aurora concentration triggers two-step complex formation. We expect that throughput and robustness will make HT-FCS a broadly applicable technology for characterizing protein network dynamics in cells.

For more information, please follow the single-molecule fluorescence public website on WeChat or click the link below.

https://mp.weixin.qq.com/s?__biz=MzkzNzI0NTc5Mg==&mid=2247485718&idx=1&sn=6fd03c86779e2eae7cbfe1a6b4b2fdc7&chksm=c2932419f5e4ad0f6fee065dc7ec94e6ffda0ca5e7045777bd25efaaccd39844f1a4f908edcd&token=928242522&lang=zh_CN#rd

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