PUBLICATION
Direct Visualization of DNA Replication Dynamics in Zebrafish Cells
- Authors
- Kuriya, K., Higashiyama, E., Avşar-Ban, E., Tamaru, Y., Ogata, S., Takebayashi, S.I., Ogata, M., Okumura, K.
- ID
- ZDB-PUB-151106-2
- Date
- 2015
- Source
- Zebrafish 12(6): 432-9 (Journal)
- Registered Authors
- Tamaru, Yutaka
- Keywords
- none
- MeSH Terms
-
- Animals
- Cell Line
- DNA/physiology*
- DNA Replication/physiology*
- Erythrocytes
- Humans
- Mitosis/physiology
- Species Specificity
- Staining and Labeling
- Time Factors
- Zebrafish/metabolism*
- PubMed
- 26540100 Full text @ Zebrafish
Citation
Kuriya, K., Higashiyama, E., Avşar-Ban, E., Tamaru, Y., Ogata, S., Takebayashi, S.I., Ogata, M., Okumura, K. (2015) Direct Visualization of DNA Replication Dynamics in Zebrafish Cells. Zebrafish. 12(6):432-9.
Abstract
Spatiotemporal regulation of DNA replication in the S-phase nucleus has been extensively studied in mammalian cells because it is tightly coupled with the regulation of other nuclear processes such as transcription. However, little is known about the replication dynamics in nonmammalian cells. Here, we analyzed the DNA replication processes of zebrafish (Danio rerio) cells through the direct visualization of replicating DNA in the nucleus and on DNA fiber molecules isolated from the nucleus. We found that zebrafish chromosomal DNA at the nuclear interior was replicated first, followed by replication of DNA at the nuclear periphery, which is reminiscent of the spatiotemporal regulation of mammalian DNA replication. However, the relative duration of interior DNA replication in zebrafish cells was longer compared to mammalian cells, possibly reflecting zebrafish-specific genomic organization. The rate of replication fork progression and ori-to-ori distance measured by the DNA combing technique were ∼1.4 kb/min and 100 kb, respectively, which are comparable to those in mammalian cells. To our knowledge, this is a first report that measures replication dynamics in zebrafish cells.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping