DNA choreography: correlating mobility and organization of DNA across different resolutions from loops to chromosomes.
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 still underexplored. Here, we made use of DNA replication to directly label genomic DNA in an unbiased genome-wide manner. This w...
| Publicado en: | Histochemistry & Cell Biology Vol. 162; no. 1/2; pp. 109 - 132 |
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| Autores principales: | , , , , , |
| Formato: | Journal Article |
| Publicado: |
Springer Nature
Jul2024
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=178293275&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 178293275 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 09486143 NQI jtl: Histochemistry & Cell Biology issn: 09486143 maglogo: N pubinfo: dt: Jul2024 vid: 162 iid: 1/2 pid: 237 pub: Springer Nature place: New York, New York artinfo: ui: 178293275 177270336 10.1007/s00418-024-02285-x 178293275 ppf: 109 ppct: 23 formats: fmt: – @attributes: type: T – @attributes: type: P tig: atl: DNA choreography: correlating mobility and organization of DNA across different resolutions from loops to chromosomes. aug: au: Pabba, Maruthi K. Meyer, Janis Celikay, Kerem Schermelleh, Lothar Rohr, Karl Cardoso, M. Cristina affil: https://ror.org/05n911h24 Department of Biology, Technical University of Darmstadt, Darmstadt, Germany sug: ab: 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 still underexplored. 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 one 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, topologically associated domains (TAD) using 3D widefield 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. On the basis of these insights, we propose that there is a link between DNA mobility and its organizational structure including spatial distribution, which impacts cellular processes. pubtype: Academic Journal doctype: Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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