| Literature DB >> 29296501 |
Yoav Shechtman1,2,3, Anna-Karin Gustavsson1,4, Petar N Petrov1, Elisa Dultz5, Maurice Y Lee1,6, Karsten Weis5, W E Moerner1,7.
Abstract
We report the observation of chromatin dynamics in living budding yeast (Saccharomyces cerevisiae) cells, in three-dimensions (3D). Using dual color localization microscopy and employing a Tetrapod point spread function, we analyze the spatio-temporal dynamics of two fluorescently labeled DNA loci surrounding the GAL locus. From the measured trajectories, we obtain different dynamical characteristics in terms of inter-loci distance and temporal variance; when the GAL locus is activated, the 3D inter-loci distance and temporal variance increase compared to the inactive state. These changes are visible in spite of the large thermally- and biologically-driven heterogeneity in the relative motion of the two loci. Our observations are consistent with current euchromatin vs. heterochromatin models.Entities:
Keywords: (070.0070) Fourier optics and signal processing; (170.1530) Cell analysis; (170.2520) Fluorescence microscopy; (170.6900) Three-dimensional microscopy
Year: 2017 PMID: 29296501 PMCID: PMC5745116 DOI: 10.1364/BOE.8.005735
Source DB: PubMed Journal: Biomed Opt Express ISSN: 2156-7085 Impact factor: 3.732