TUdatalib : DNA choreography: correlating mobility and organization of DNA across different resolutions from loops to chromosomes

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dc.contributor.author	Pabba, Maruthi K.
dc.contributor.author	Meyer, Janis
dc.contributor.author	Celikay, Kerem
dc.contributor.author	Schermelleh, Lothar
dc.contributor.author	Rohr, Karl
dc.contributor.author	M. Cristina, Cardoso
dc.date.accessioned	2024-03-25T15:00:52Z
dc.date.available	2024-03-25T15:00:52Z
dc.date.issued	2024-02-16
dc.identifier.uri	https://tudatalib.ulb.tu-darmstadt.de/handle/tudatalib/4192
dc.identifier.uri	https://doi.org/10.48328/tudatalib-1398
dc.description	The dynamics of DNA in the cell nucleus plays a role in cellular processes and fates but the interplay of DNA mobility with the hierarchical levels of DNA organization is unexplored. Here, we made use of DNA replication to directly label genomic DNA in an unbiased genome-wide manner. This was followed by live-cell time-lapse microscopy of the labeled DNA combining imaging at different resolutions levels simultaneously and allowing to trace DNA motion across organization levels within the same cells. Quantification of the labeled DNA segments at different microscopic resolution levels revealed sizes comparable to the ones reported for DNA loops using 3D super-resolution microscopy, topological associated domains (TAD) using 3D wide-field microscopy and also entire chromosomes. By employing advanced chromatin tracking and image registration, we discovered that DNA exhibited higher mobility at the individual loop level compared to the TAD level and even less at the chromosome level. Additionally, our findings indicate that chromatin movement, regardless of the resolution, slowed down during the S-phase of the cell cycle compared to the G1/G2 phases. Furthermore, we found that a fraction of DNA loops and TADs exhibited directed movement with the majority depicting constrained movement. Our data also indicated spatial mobility differences with DNA loops and TADs at the nuclear periphery and the nuclear interior exhibiting lower velocity and radius of gyration than the intermediate locations. Based on these insights, we propose that there is a link between DNA mobility and its organizational structure including spatial distribution, which impacts cellular processes.	de_DE
dc.language.iso	en	de_DE
dc.rights	Creative Commons Attribution-NonCommercial 4.0
dc.rights.uri	https://creativecommons.org/licenses/by-nc/4.0/
dc.subject	Image registration	de_DE
dc.subject	live cell DNA labeling	de_DE
dc.subject	motion analysis	de_DE
dc.subject	single particle tracking	de_DE
dc.subject	super-resolution microscopy	de_DE
dc.subject	wide-field microscopy	de_DE
dc.subject.classification	2.11-03 Zellbiologie	de_DE
dc.subject.ddc	570
dc.title	DNA choreography: correlating mobility and organization of DNA across different resolutions from loops to chromosomes	de_DE
dc.type	Dataset	de_DE
dc.type	Image	de_DE
dc.description.version	for review	de_DE
tud.unit	TUDa
tud.history.classification	Version=2020-2024;201-03 Zellbiologie