Online gamers crack AIDS enzyme puzzle

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New York: Online gamers have decoded the structure of an enzyme of an AIDS-like virus that had upset scientists for a decade.

The exploit was published in the journal ‘Nature Structural & Molecular Biology’, where both gamers and researchers were honoured as co-authors.

Their target was a monomeric protease enzyme, a cutting agent in the complex molecular tailoring of retroviruses, a family that includes HIV. Figuring out the structure of proteins is vital for understanding the causes of many diseases and developing drugs to block them.

But a microscope gives only a flat image of what to the outsider looks like a plate of one-dimensional scrunched-up spaghetti.

Pharmacologists, though, need a 3-D picture that ‘unfolds’ the molecule and rotates it in order to reveal potential targets for drugs. This is where Foldit comes in.

Developed in 2008 by the University of Washington; it is a fun-for-purpose video game in which gamers, divided into competing groups, compete to unfold chains of amino acids, the building blocks of proteins, using a set of online tools. To the astonishment of the scientists, the gamers produced an accurate model of the enzyme in just three weeks.

“Cracking the enzyme provides new insights for the design of antiretroviral drugs,” says the study, referring to the lifeline medication against the human immunodeficiency virus (HIV). It is believed to be the first time that gamers have resolved a long-standing scientific problem. “We wanted to see if human intuition could succeed where automated methods had failed,” Firas Khatib of the university’s biochemistry lab said.

“The ingenuity of game players is a formidable force that, if properly directed, can be used to solve a wide range of scientific problems.”

One of Foldit’s creators, Seth Cooper, explained why gamers had succeeded where computers had failed. “People have spatial reasoning skills, something computers are not yet good at,” he said.