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Examination of Mitotic and Meiotic Fission Yeast Nuclear Dynamics by Fluorescence Live-cell Microscopy
Published on: June 24, 2019
SCF(Dia2) regulates DNA replication forks during S-phase in budding yeast
Satoru Mimura1, Makiko Komata, Tsutomu Kishi
1Division of Biological Science, Graduate school of Science, Nagoya University, Chikusa-ku, Nagoya, Japan.
The EMBO Journal
|November 14, 2009
Summary
Dia2 protein regulates DNA replication fork progression in yeast. It interacts with replisome components, influencing their stability and activity during DNA replication.
Area of Science:
- Molecular Biology
- Cell Biology
- Genetics
Background:
- Dia2 is an F-box protein in Saccharomyces cerevisiae.
- Its precise function in DNA replication regulation is largely unknown.
Purpose of the Study:
- To elucidate the role of Dia2 in DNA replication.
- To identify Dia2-interacting proteins within the replisome.
Main Methods:
- Modified yeast two-hybrid screening to identify binding partners.
- In vivo and in vitro ubiquitination assays.
- Domain analysis of Dia2.
- Chromatin immunoprecipitation followed by microarray (ChIP-on-chip) analysis.
Main Results:
- Dia2 interacts with replisome components Mrc1, Ctf4, and Mcm2.
- SCF(Dia2) ubiquitinates Mrc1 and Ctf4.
- The leucine-rich repeat motif of Dia2 is essential for replisome progression regulation.
- The tetratricopeptide repeat (TPR) motif mediates interaction with replisome components and influences Dia2 stability.
- Dia2 localizes to replication forks and regulates their progression, particularly under hydroxyurea treatment.
Conclusions:
- Dia2 plays a crucial role in regulating DNA replication fork progression.
- It interacts directly with replisome components, modulating their activity and stability.
- Dia2's function is linked to maintaining genome stability during replication.
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