Combined SPT and FCS methods reveal a mechanism of RNAP II oversampling in cell nuclei.

ABSTRACT: Gene expression orchestration is a key question in fundamental and applied research. Different models for transcription regulation were proposed, yet the dynamic regulation of RNA polymerase II (RNAP II) activity remains a matter of debate. To improve our knowledge of this topic, we investigated RNAP II motility in eukaryotic cells by combining single particle tracking (SPT) and fluorescence correlation spectroscopy (FCS) techniques, to take advantage of their different sensitivities in order to analyze together slow and fast molecular movements. Thanks to calibrated samples, we developed a benchmark for quantitative analysis of molecular dynamics, to eliminate the main potential instrumental biases. We applied this workflow to study the diffusion of RPB1, the catalytic subunit of RNAP II.

SUBMITTER: Fournier M 

PROVIDER: S-EPMC10480184 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature