Abstract
Iteron-containing plasmids are model systems for studying the metabolism of extrachromosomal genetic elements in bacterial cells. Here we describe the current knowledge and understanding of the structure of iteron-containing replicons, the structure of the iteron plasmid encoded replication initiation proteins, and the molecular mechanisms for iteron plasmid DNA replication initiation. We also discuss the current understanding of control mechanisms affecting the plasmid copy number and how host chaperone proteins and proteases can affect plasmid maintenance in bacterial cells.
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