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Replisome-mediated DNA replication.

S J Benkovic¹, A M Valentine, F Salinas

¹Pennsylvania State University, Department of Chemistry, 414 Wartik Laboratory, University Park, Pennsylvania 16802, USA. sjb1@psu.edu

Annual Review of Biochemistry

|June 8, 2001

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Genomic replication involves protein assembly at DNA replication forks. This review compares three prokaryotic systems (E. coli, T4, T7) highlighting conserved functions despite protein differences.

Area of Science:

Molecular Biology
Genetics
Biochemistry

Background:

Genomic replication is a complex process requiring precise protein assembly at the DNA replication fork.
Decades of research on Escherichia coli, bacteriophage T4, and bacteriophage T7 have identified key proteins involved in DNA replication.

Purpose of the Study:

To summarize and compare the DNA replication mechanisms of E. coli, T4, and T7.
To analyze protein-protein interactions and reaction coordination during leading and lagging strand synthesis.

Main Methods:

Comparative analysis of three distinct prokaryotic DNA replication systems.
Review of established literature on protein functions and interactions in DNA replication.

Main Results:

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Conserved fundamental components exist across the three systems, despite variations in protein number and sequence homology.
Replication involves holoenzyme assembly, DNA unwinding by helicase, RNA primer synthesis by primase, and DNA synthesis by polymerases.

Conclusions:

The three prokaryotic systems share conserved core mechanisms for DNA replication fork progression.
Understanding these systems provides insights into the generality of DNA replication processes.