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PCR

PCR

PCR - Polymerase Chain Reaction

PCR - Polymerase Chain Reaction

Plasmids

Plasmids

Plasmids are extrachromosomal DNA molecules found in bacteria, archaea, and some eukaryotic microbes like yeast. These small, circular DNA structures typically contain fewer than 30 genes, although some may exist linearly. Plasmids vary in their number within a cell, known as copy number. Single-copy plasmids are present in one copy per cell and multi-copy plasmids are present in multiple copies, reaching over 100 copies per cell.Plasmids usually replicate independently of the chromosomal DNA...

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Rapid, Enzymatic Methods for Amplification of Minimal, Linear Templates for Protein Prototyping using Cell-Free Systems

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Plasmid Rolling-Circle Replication.

J A Ruiz-Masó¹, C MachóN², L Bordanaba-Ruiseco¹

¹Centro de Investigaciones Biológicas (CSIC), Ramiro de Maeztu 9, 28040 Madrid, Spain.

Microbiology Spectrum

|June 25, 2015

Summary

This summary is machine-generated.

Rolling-circle replication (RCR) is a simple plasmid DNA replication strategy. This review explores RCR plasmids

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Area of Science:

Molecular Biology
Genetics
Microbiology

Background:

Plasmids are extrachromosomal DNA elements crucial for bacterial adaptation and evolution.
Replication initiation is a key challenge in DNA synthesis, as polymerases cannot start de novo.
Rolling-circle replication (RCR) is an efficient plasmid replication mechanism involving a single initiation site.

Purpose of the Study:

To provide a comprehensive overview of the lifestyle of RCR plasmids.
To emphasize characteristic traits, including promiscuity, stability, and utility as vectors.
To identify unanswered questions regarding RCR plasmid replication and maintenance.

Main Methods:

Review of existing literature on RCR plasmid replication.
Analysis of conserved genetic elements in RCR plasmid genomes.
Comparative study of RCR plasmids across different host domains (bacteria, archaea).

Main Results:

RCR plasmid genomes typically contain elements for leading/lagging strand initiation, phenotypic determinants, and mobilization.
RCR is prevalent in Gram-positive bacteria but also found in Gram-negative bacteria and archaea.
RCR plasmids exhibit diverse lifestyles, varying in host range, stability, and vector applications.

Conclusions:

RCR represents a fundamental and well-characterized plasmid replication strategy.
Further research is needed to fully elucidate the complexities of RCR plasmid biology.
Understanding RCR plasmids is vital for their application in biotechnology and genetic engineering.