CHEVY CHASE, Md, October 11, 1999 - Günter Blobel, a Howard Hughes Medical Institute investigator at The Rockefeller University, has won the 1999 Nobel Prize for Physiology or Medicine.

Blobel, 63, was awarded the prize for his discovery that "proteins have intrinsic signals that govern their transport and localization in the cell," the Karolinska Institute of Sweden said in its citation.

"Günter made one of the most important discoveries in modern biology," said Purnell W. Choppin, M.D., HHMI's president. "A cell may have more than a billion protein molecules, all of which need to travel to a specific location. Through a historic series of experiments, Günter revealed that each protein has its own "molecular bar code," which the cell reads and then guides the protein to the correct location."

Choppin, who headed Rockefeller's laboratory of virology before joining HHMI in 1985, added that "I have known Günter for more than 30 years and could not be more delighted to see him receive this honor. He is not only one of the great scientists of our time, but also a wonderful colleague and mentor of young scientists."

Blobel and his colleagues explained how the cell's protein distribution system operates. They found sequences at the end of each protein that direct the proteins to specific locations. Special receptors on the surfaces of membranes read those signals and allow the appropriate proteins either to pass through or to lodge within the membrane.

In its citation, the Karolinska Institute said "the principles discovered and described by Günter Blobel turned out to be universal, operating similarly in yeast, plant, and animal cells. A number of human hereditary diseases are caused by errors in these signals and transport mechanisms. Blobel's research has also contributed to the development of a more effective use of cells
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Contact: Jim Keeley
keeleyj@hhmi.org
301-215-8858
Howard Hughes Medical Institute
11-Oct-1999