公开(公告)号：US20170321263A1

公开(公告)日：2017-11-09

申请号：US15527560

申请日：2015-11-18

Applicant: Japan Science and Technology Agency

Inventor： Masayuki SU'ETSUGU ,  Hiroko KOBAYASHI

IPC: C12Q1/68 ,  C12P19/34 ,  C12N9/00 ,  C12N15/00

CPC classification number: C12Q1/6846 ,  C12N9/00 ,  C12N9/12 ,  C12N9/16 ,  C12N9/90 ,  C12N15/00 ,  C12N15/09 ,  C12P19/34 ,  C12Q1/6853 ,  C12Q1/686

Abstract: The present invention provides a method for easily and exponentially amplifying circular DNA, particularly long chain circular DNA, in a cell-free system. Specifically, the present invention provides a method for amplifying circular DNA in which circular DNA having a replication origin sequence (origin of chromosome (oriC)) is mixed with a reaction solution containing the following enzyme groups to form a reaction mixture, which is then reacted under an isothermal condition, the enzyme groups being:(1) a first enzyme group that catalyzes replication of circular DNA; (2) a second enzyme group that catalyzes an Okazaki fragment maturation and synthesizes two sister circular DNAs constituting a catenane; and (3) a third enzyme group that catalyzes a separation of two sister circular DNAs.