Hugo Theorell

Hugo Theorell
Unknown author · Public domain · source
Name	Hugo Theorell
Caption	Hugo Theorell in 1955
Birth date	06 July 1903
Birth place	Linköping, Sweden
Death date	15 August 1982
Death place	Stockholm, Sweden
Nationality	Swedish
Fields	Biochemistry, Enzymology
Workplaces	Uppsala University, Karolinska Institutet, Nobel Institute
Alma mater	Karolinska Institutet
Known for	Oxidase enzymes, Myoglobin, Alcohol dehydrogenase
Prizes	Nobel Prize in Physiology or Medicine (1955)
Spouse	Elin Margit Elisabeth Alenius

Hugo Theorell was a pioneering Swedish biochemist whose groundbreaking research on oxidation enzymes fundamentally advanced the field of enzymology. His meticulous work, particularly on the crystalline myoglobin and the mechanisms of alcohol dehydrogenase, earned him the Nobel Prize in Physiology or Medicine in 1955. Theorell spent much of his distinguished career at the Karolinska Institutet and as director of the biochemistry department at the Nobel Institute. His legacy endures through his profound contributions to understanding the action of enzymes and coenzymes in biological oxidation.

Early life and education

Hugo Theorell was born in Linköping, Sweden, to physician Thure Theorell and his wife Armida Bill. He displayed an early aptitude for science and music, initially considering a career as a professional violinist. He ultimately chose medicine, enrolling at the Karolinska Institutet in Stockholm in 1921. Under the mentorship of professor Einar Hammarsten, Theorell developed a deep interest in biochemistry, earning his medical degree in 1924 and his doctorate in 1930 with a thesis on the lipids of blood plasma.

Career and research

After completing his doctorate, Theorell worked as a professor at Uppsala University before receiving a Rockefeller Foundation fellowship in 1933. This allowed him to study under the renowned Otto Warburg at the Kaiser Wilhelm Institute for Cell Physiology in Berlin-Dahlem. There, he achieved his first major breakthrough by isolating crystalline myoglobin, a crucial oxygen-storing protein in muscle tissue. In 1937, he returned to Sweden to become the first head of the newly founded biochemistry department at the Nobel Institute, a position he held for decades. His subsequent research focused intensely on oxidation enzymes, particularly the yellow enzyme studied by Warburg. Theorell successfully separated its coenzyme from the protein component, proving they were separate entities, and conducted definitive studies on cytochrome c, peroxidase, and alcohol dehydrogenase, elucidating their precise reaction mechanisms with NAD+ and metals.

Nobel Prize and later work

In 1955, Hugo Theorell was awarded the Nobel Prize in Physiology or Medicine "for his discoveries concerning the nature and mode of action of oxidation enzymes." This recognition solidified his international reputation as a leader in biochemistry. His later work continued to explore enzyme kinetics and mechanisms, contributing significantly to the understanding of flavoproteins and heme proteins. He remained an active director at the Nobel Institute until his retirement in 1970, mentoring numerous future scientists and maintaining collaborations with institutions like the University of California, Berkeley and the Weizmann Institute of Science.

Personal life and legacy

Theorell married Elin Margit Elisabeth Alenius in 1931, and they had three sons and a daughter. Despite being diagnosed with polio in 1929, which left him partially paralyzed, he pursued his laboratory work with great determination and ingenuity. An accomplished musician, he served as chairman of the Stockholm Symphony Orchestra society. Theorell's legacy is that of a meticulous experimentalist who bridged the gap between Otto Warburg's school and modern molecular enzymology. His work laid essential groundwork for subsequent research in metabolism, toxicology, and the molecular basis of disease.

Awards and honors

Beyond the Nobel Prize, Theorell received numerous prestigious accolades. He was elected a member of the Royal Swedish Academy of Sciences in 1942 and served as a foreign member of the Royal Society and the American Academy of Arts and Sciences. He was also a member of the Pontifical Academy of Sciences. Among his other honors were the Björkén Prize, the Berzelius Medal of the Swedish Medical Society, and an honorary doctorate from the Sorbonne. The Karolinska Institutet annually awards the Theorell Lecture in his honor, and an asteroid, 11351 Leucus, bears his name in a Latinized form.

Category:1903 births Category:1982 deaths Category:Swedish biochemists Category:Nobel laureates in Physiology or Medicine Category:Karolinska Institutet alumni