Retrovirus -

: Finally, a protease enzyme cleaves the viral proteins into their functional forms, maturing the virus so it can infect new cells. Human Health and Diseases

: The host cell's machinery mistakenly treats the provirus as one of its own genes, producing viral mRNA and proteins. These components assemble into new, immature viral particles that bud off from the cell.

Retroviruses are responsible for several significant human diseases. The most well-known is , which attacks the immune system's T-cells and can lead to AIDS . Other notable human retroviruses include: Retrovirus

Retroviruses are a unique family of viruses that have fundamentally changed our understanding of genetics, evolution, and medicine. Unlike most living organisms that store genetic information as DNA, retroviruses carry their genetic blueprint as . Their name refers to their "backward" replication process: they use a specialized enzyme called reverse transcriptase to convert their RNA into DNA once they infect a host cell. The Replication Cycle: Rewriting the Host’s Code

The hallmark of a retrovirus is its ability to integrate its own genetic material permanently into the host's genome. This process occurs in several distinct stages: : Finally, a protease enzyme cleaves the viral

: Another enzyme, integrase , carries this viral DNA into the cell's nucleus and "clips" it into the host's own DNA. At this stage, the integrated viral DNA is known as a provirus .

Because these viruses integrate into the host DNA, they are incredibly difficult to cure. Modern medicine manages these infections with , which targets specific enzymes like reverse transcriptase or protease to stop the virus from replicating. The "Fossil" Record in Our DNA Unlike most living organisms that store genetic information

: Linked to adult T-cell leukemia and certain neurological conditions. HTLV-2 : Associated with milder neurological disorders.