The invention relates to a construction method of an OriCiro
cell-free
cloning system based on an RCR technology, and belongs to the technical field of
molecular biology. The construction method comprises the following steps: expression and purification of high-activity Tn5
transposase, transposon-mediated oriC
insertion, RCR amplification, traceless excision of oriC transposon and repair cyclization. The construction method provided by the invention provides a rapid, reliable and
mutation-burden-free new
genome construction and rescue path for the existing research, can solve the difficult problem of construction of large-size and toxic
DNA sequence vectors for
gene therapy, shortens the research and development and production periods, and improves the production efficiency. Therefore, a powerful tool is provided for the fields of preparation of mRNA vaccines or therapy plasmids, construction of
gene therapy vectors, supply of pharmaceutical-grade
plasmid DNA, research of a
virus molecular mechanism and the like.