A new class of drugs may soon be developed to treat everything from breast and ovarian cancer to tuberculosis, thanks to a 17-year-old’s system for declassifying the interactions between two types of proteins.

Johah Kallenbach, a high school senior at Germantown Academy in Fort Washington, Pa., won second place and a $75,000 scholarship Tuesday at the Intel Science Talent Search, an elite science fair, for his development of the computer program.