Peter Walter - Vilcek Foundation

Peter Walter’s move from his native Germany to the United States marks a watershed moment in a career spanning nearly four decades and committed to uncovering basic insights on cell function. A Howard Hughes Medical Institute Investigator at the University of California, San Francisco, he has discovered mechanisms that govern the movement of proteins within cells and enable cells to adapt to a range of conditions.

Born in West Berlin during the Cold War era, Walter nursed a love of chemistry from a young age, thanks to adventures in his father’s drugstore. Years later, he studied chemistry at the Free University in Berlin. He realized that a successful scientific career hinged on facility with the English language, which he mastered through a nine-month-long sojourn in the United States before returning to research in Germany.

Peter Walter is pictured standing in a workshop with shelves filled with paper, books, and tools behind him.

At Vanderbilt University in Nashville, Tennessee, Walter learned to independently perform experiments in organic chemistry in the lab of researcher Thomas Harris. At Rockefeller University, he joined the lab of Günter Blobel in 1973 — marking the beginning of his association with the international world of cell biology.

During an assistant professorship at the University of California, San Francisco, he began the work that might prove to be his enduring legacy: the discovery of a key element in a quality control mechanism that cells deploy to deal with stress related to the buildup of misfolded proteins.

A close-up of laboratory testing equipment including multiple tubes, petri dishes, and syringes.

Because improperly folded proteins burden cells and hamper their function, they are implicated in many inherited human diseases, including certain forms of elevated cholesterol, cystic fibrosis, retinitis pigmentosa, and multiple myeloma, a cancer of immune cells. Walter’s team has also found that the unfolded protein response influences memory consolidation in rodents, suggesting a role in human cognitive impairment.

Together with colleagues at leading biotechnology firms, Walter hopes to convert his basic research findings into drugs for such conditions.