Retrovirus Now
: 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 virus attaches to specific receptors on a host cell (like CD4 receptors in the case of HIV) and fuses with the membrane, releasing its RNA and enzymes into the cytoplasm. Retrovirus
Retroviruses are more than just pathogens; they are masters of genetic hijacking that have left an indelible mark on the Tree of Life. From the ongoing global challenge of HIV to the ancient "junk DNA" that shapes our biology, retroviruses continue to be a primary focus of medical research and evolutionary study. : 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 . From the ongoing global challenge of HIV to
: 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.
: The enzyme reverse transcriptase "back-transcribes" the viral RNA into a double-stranded DNA copy.