Plasmid R1 DNA replication dependent on protein synthesis in cell-free extracts of E. coli

Abstract
Extracts of E. coli can carry out the complete replication of miniplasmids derived from the antibiotic-resistance plasmid R1. This R1 replication system differs from the previously described CoE1 and R6K systems in its strict dependence on DNA-directed protein synthesis. This is probably the 1st report of the functional coupling of the 3 fundamental reactions of genetic information transfer (transcription, translation and replication) in a cell-free system.