Plasmid Vector for Expressing mRNA in Vitro, Construction Method and Application Thereof

摘要

A plasmid vector for expressing mRNA in vitro, a construction method and an application thereof are provided. The plasmid vector includes a poly(adenyl deoxyribonucleotide) (poly(dA)) fragment formed by more than 30 adenyl deoxyribonucleotides at the 3′-end tail of a gene to be inserted for expression. The plasmid vector for expressing mRNA in vitro in the present invention can express a target protein gene and a poly(A) formed by 60 adenyl ribonucleotides, and the expressed mRNA directly possesses the poly(A) without additional tailing operation. In addition, the mRNA transcribed in vitro shows stronger mRNA stability and higher protein expression ability after being transfected into cells.