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Updated: Jun 22, 2026
17:14
Chromosome Replicating Timing Combined with Fluorescent In situ Hybridization
Published on: December 10, 2012
Preventing re-replication of chromosomal DNA.
1Wellcome Trust Biocentre, University of Dundee, Dundee DD1 5EH, UK. j.j.blow@dundee.ac.uk
Nature Reviews. Molecular Cell Biology
|June 2, 2005
Summary
Accurate DNA duplication in eukaryotic cells requires precise replication origin licensing. Minichromosome maintenance (Mcm) 2-7 proteins are loaded in G1 phase, enabling DNA replication during S phase.
Area of Science:
- Molecular Biology
- Cell Biology
- Genetics
Background:
- Chromosomal DNA must be precisely duplicated each cell cycle.
- Eukaryotic DNA replication occurs in distinct phases.
- Replication origins are licensed during late mitosis and G1 phases.
Purpose of the Study:
- To elucidate the process of replication licensing.
- To understand the regulation of DNA replication during the cell cycle.
- To provide biochemical and structural insights into pre-replicative complex formation.
Main Methods:
- Biochemical assays to study protein interactions.
- Structural biology techniques (e.g., X-ray crystallography, cryo-EM).
- Cell cycle analysis and genetic manipulation.
Main Results:
- Minichromosome maintenance (Mcm) 2-7 proteins form a pre-replicative complex at origins.
- Mcm2-7 loading is a key licensing step during late mitosis and G1.
- These complexes are essential for initiating and elongating replication forks in S phase.
Conclusions:
- Replication licensing is a tightly regulated process crucial for genome stability.
- Mcm2-7 proteins play a central role in initiating eukaryotic DNA replication.
- Recent advances offer new insights into the molecular mechanisms of DNA replication control.
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