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DnaA and ORC: more than DNA replication initiators
Graham Scholefield1, Jan-Willem Veening, Heath Murray
1Centre for Bacterial Cell Biology, Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle Upon Tyne, NE2 4AX, UK.
Abstract:
Mutations in DNA replication initiator genes in both prokaryotes and eukaryotes lead to a pleiotropic array of phenotypes, including defects in chromosome segregation, cytokinesis, cell cycle regulation and gene expression. For years, it was not clear whether these diverse effects were indirect consequences of perturbed DNA replication, or whether they indicated that DNA replication initiator proteins had roles beyond their activity in initiating DNA synthesis. Recent work from a range of organisms has demonstrated that DNA replication initiator proteins play direct roles in many cellular processes, often functioning to coordinate the initiation of DNA replication with essential cell-cycle activities. The aim of this review is to highlight these new findings, focusing on the pathways and mechanisms utilized by DNA replication initiator proteins to carry out a diverse array of cellular functions.
Insights
DNA replication initiator proteins have roles beyond DNA synthesis. Recent studies show they directly coordinate DNA replication with cell cycle activities in diverse organisms.
Area of Science:
- Molecular Biology
- Cell Biology
- Genetics
Background:
- Mutations in DNA replication initiator genes cause various cellular defects.
- The precise roles of these initiator proteins beyond DNA synthesis were previously unclear.
Purpose of the Study:
- To review recent findings on the multifaceted roles of DNA replication initiator proteins.
- To highlight mechanisms coordinating DNA replication with cell cycle activities.
Main Methods:
- Literature review of recent research across prokaryotes and eukaryotes.
- Focus on studies demonstrating direct functions of initiator proteins.
Main Results:
- DNA replication initiator proteins directly participate in multiple cellular processes.
- These proteins coordinate DNA replication initiation with essential cell-cycle events.
Conclusions:
- DNA replication initiator proteins have critical functions beyond initiating DNA synthesis.
- Understanding these roles is key to comprehending cell cycle regulation and gene expression.
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