HIV-1 tat-vpr overlapping mRNA reading frame

The HIV-1 tat-vpr overlapping mRNA reading frame is a specific region of the human immunodeficiency virus type 1 (HIV-1) genome where the open reading frames of the tat and vpr genes overlap. This region is highly conserved across different HIV-1 isolates, making it an ideal target for sequence-specific therapeutic agents such as ribozymes and antisense oligonucleotides. The tat gene encodes a critical transactivator of viral transcription, while vpr encodes a protein involved in the nuclear import of the pre-integration complex and the induction of G2 cell cycle arrest. Targeting this overlapping region allows for the simultaneous disruption of multiple essential viral processes. The hammerhead ribozyme OZ1 (also known as Rz2) was specifically designed to target this site, binding to and cleaving the viral mRNA to prevent the production of Tat and Vpr proteins. OZ1 has been evaluated in Phase I and Phase II clinical trials as a gene therapy approach, delivered via retroviral vectors into hematopoietic stem cells to provide long-term resistance to HIV-1 replication.

Other names

HIV-1 tat/vpr overlaptat-vpr mRNAvpr-tat overlapping regionRz2 target site

Ribozyme-mediated cleavage of viral mRNA leading to inhibition of Tat and Vpr protein synthesis