Recombinant vector with optimized A-bulge

摘要

The disclosure describes replication competent retroviral vectors (RCR) for gene therapy and gene delivery. The RCR includes an IRES sequence having 6-7 A's in A-bulge of the bifurcation region. The disclosure provides recombinant replication competent retrovirus comprising: a retroviral GAG protein; a retroviral POL protein; a retroviral envelope; a retroviral polynucleotide comprising Long-Terminal Repeat (LTR) sequences at the 3' end of the retroviral polynucleotide sequence, a promoter sequence at the 5' end of the retroviral polynucleotide.