Human immunodeficiency virus 1 Pol polyprotein (HIV-1 Pol)

The Human immunodeficiency virus 1 Pol polyprotein is a polyprotein precursor encoded by the pol gene of HIV-1. It is proteolytically processed to yield three essential viral enzymes: protease (PR), reverse transcriptase (RT), and integrase (IN). Each enzyme is crucial for distinct steps in the HIV replication cycle—PR is responsible for viral protein processing and maturation, RT for synthesizing DNA from the viral RNA genome, and IN for integrating the viral DNA into the host chromosome[1][2][3][4][5]. The polyprotein forms through ribosomal frameshifting as a Gag-Pol fusion, and its correct maturation is required for the production of infectious virus particles. The structure and activity of Pol and its constituent enzymes are the primary targets of current antiretroviral therapies, with inhibitors developed to target each of the mature enzymes[3][4]. The polyprotein’s mutation-prone loci are important markers for monitoring antiretroviral therapy resistance and guiding patient management.

Other names

HIV-1 PolHIV-1 Pol polyproteinHIV-1 polymerase

Inhibition of polyprotein-encoded enzymatic activities: - Blocking HIV-1 protease impairs virus maturation and infectivity - Blocking reverse transcriptase halts conversion of viral RNA to DNA, inhibiting replication - Blocking integrase prevents integration of viral DNA into the host genome