Stabilization and translation of immobilized mRNA on latex beads for cell-free protein synthesis system

The stability of immobilized mRNA against ribonucleases was investigated in a cell-free protein synthesis system. The plasmid-encoding protein A with the 20-mer poly(A) tail under the control of T7 promoter was constructed, a nd the corresponding mRNA was synthesized by T7 RNA polymerase reaction. Th e resulting mRNA was immobilized on oligo(dT)-immobilized latex beads by hy bridization utilizing the poly(A) tail of mRNA at the 3'-terminus. The mRNA was stabilized against three types of nucleases (3'-OH exonuclease, 5'-OH exonuclease, and endonuclease) by immobilization. Translation of immobilize d mRNA with a continuous-flow cell-free protein-synthesizing system from Sa ccharomyces cerevisiae was ascertained. Reusability of the immobilized mRNA as genetic information was also examined.