Early Immunity to Chimp Virus Leaves Humans Open to HIV

An advantage 4M years ago is a weakness now
By Jonas Oransky,  Newser Staff
Posted Jun 22, 2007 10:36 AM CDT
Early Immunity to Chimp Virus Leaves Humans Open to HIV
Participants watch a giant AIDS flag unfurl in city hall during...   (Getty Images)

(Newser) – Humans are more susceptible to HIV than other primates because our ancestors evolved a protein that could fight off a different retrovirus that infected chimps, says Scientific American. The most conspicuous difference between the chimpanzee genome sequenced in 2005 and the human one, says a Seattle virologist, was 130 copies of a retrovirus that inserted its DNA into cells, as HIV does today.

Scientists then looked for the reason chimps were infected and humans weren't, which led to the modified protein. Sleuthing has also determined that no version of that tricky protein could fend off both the 4-million-year-old virus and HIV. (Read more AIDS stories.)

We use cookies. By Clicking "OK" or any content on this site, you agree to allow cookies to be placed. Read more in our privacy policy.
Get the news faster.
Tap to install our app.
Install the Newser News app
in two easy steps:
1. Tap in your navigation bar.
2. Tap to Add to Home Screen.