Nobel Laureate Ada Yonath, Pioneer in Ribosome Structure, Dies at 87

Professor Ada Yonath, a Nobel Prize laureate in Chemistry and Israel Prize recipient, passed away on Monday at the age of 87. Yonath, affiliated with the Weizmann Institute of Science, was a trailblazer in structural biology whose groundbreaking research elucidated the structure and function of the ribosome, the cellular machinery responsible for protein synthesis.

Her seminal work, which earned her the Nobel Prize in Chemistry in 2009 alongside Venkatraman Ramakrishnan and Thomas A. Steitz, revolutionized the understanding of one of life's fundamental processes. The Weizmann Institute's President, Professor Alon Chen, eulogized Yonath as an "exceptional scientist" who pursued challenging paths with "determination, curiosity, and courage." He highlighted that her discoveries opened new avenues in combating antibiotic resistance.

Yonath continued to lead an active laboratory, publish research, and engage in scientific collaborations until her final days. President Isaac Herzog of Israel paid tribute to her on social media, calling her a "global trailblazer" whose work demonstrated how "curiosity, dedication, and uncompromising determination can break the boundaries of human knowledge." He added that her discoveries "changed the face of science and brought immense honor to the State of Israel."

The ribosome, often called the cell's "protein factory," translates genetic information from DNA into proteins. Yonath's research aimed to determine its three-dimensional structure at the atomic level using X-ray crystallography, a feat many in the scientific community deemed impossible at the time due to the ribosome's size and complexity. After approximately 25,000 attempts, Yonath and her teams successfully produced the first ribosome crystals in 1980 and later developed a rapid freezing method to minimize damage during X-ray exposure.

In 2000, her teams determined the complete three-dimensional structures of the two subunits of bacterial ribosomes, an achievement recognized by the journal Science as one of the year's top scientific breakthroughs. This structural understanding has direct medical implications, as many antibiotics target bacterial ribosomes. Yonath's research revealed precisely how various drugs bind to the ribosome, why they affect bacteria more than human cells, and how bacterial resistance develops, paving the way for the design of new and improved antibiotics in an era of rising global resistance.

Born in Jerusalem in 1939 to a modest family, Yonath began working at a young age after her father's death. She studied chemistry at the Hebrew University and earned her Ph.D. in X-ray crystallography from the Weizmann Institute in 1968. Upon returning to Israel after postdoctoral studies in the U.S., she established the first laboratory for protein crystallography in Israel at the Weizmann Institute in 1970. Throughout her career, Yonath received numerous accolades, including the Israel Prize in Chemistry (2002), the Wolf Prize in Chemistry (2007), and the L'Oréal-UNESCO Award for Women in Science (2008), before becoming the first woman in 45 years to win the Nobel Prize in Chemistry in 2009.