The lock and key mechanism of enzyme action represents a conceptual cornerstone in biochemistry, first hypothesized by Emil Fischer to explain how biological substrates bind to enzymes. This discovery, alongside his foundational work in organic chemistry, established the structural understanding of carbohydrates and proteins that remains central to modern chemical science and pharmaceutical development today.
Early Academic Development
Born in Euskirchen in 1852, Emil Fischer entered the University of Bonn in 1871 before transferring to the University of Strasbourg. He earned his doctorate in 1874 under the supervision of Adolf von Baeyer. Remaining at Strasbourg as an independent research student, he was appointed assistant of the organic laboratory by the fall of 1874. During this period, he discovered hydrazines, including phenylhydrazine, which served as a vital tool for his subsequent studies on sugar synthesis.
Advancement in Sugar and Purine Chemistry
Fischer conducted extensive research into the chemical composition of uric acid and its derivatives. Between 1881 and 1882, he successfully identified the formulae for xanthine, theobromine, and caffeine, achieving the first synthesis of the latter. His work on sugars utilized phenylhydrazones to form osazones, which allowed for the accurate identification of carbohydrates. He eventually deduced the formulae of the 16 stereoisomeric glucoses, providing critical support for the Le Bel–Van 't Hoff rule concerning asymmetric carbon atoms.
Twenty questions, eight minutes on the clock, and a percentile measured against everyone who has taken it. No sign-up.
Take the IQ test →Peptide Synthesis and Pharmaceutical Contributions
Fischer transitioned into the study of proteins by breaking down complex albumins into amino acids. By 1901, his group synthesized the first free dipeptide, and by 1906, they had produced over 65 peptides. Beyond pure chemistry, he collaborated with physician Josef von Mering to introduce the barbiturate sedative barbital in 1904. His pedagogical and research career spanned positions at the University of Würzburg, the University of Erlangen–Nuremberg, and ultimately the Friedrich Wilhelm University of Berlin.
Recognition and Legacy
In 1902, Fischer received the Nobel Prize in Chemistry for his contributions to sugar and purine synthesis. His scientific impact was recognized through memberships in numerous institutions, including the Royal Society, the Russian Academy of Sciences, and the National Academy of Sciences. He was also awarded the Cothenius Medal and the Helmholtz Medal. Fischer passed away in Berlin in 1919 and is buried at the Friedhof Wannsee.
Fast facts
- Born: 1852, Euskirchen
- Died: 1919, Berlin
- Nobel Prize in Chemistry: 1902
- Education: University of Strasbourg, University of Bonn
- Key Discovery: Fischer esterification
- Notable Development: Fischer projection
- Burial Site: Friedhof Wannsee, Lindenstraße
- Professional Titles: Chemist, university teacher, biochemist
Questions readers ask
What is the lock and key mechanism?
It is a hypothesis proposed by Fischer to explain the specific interaction between enzymes and their substrates.
What major award did Emil Fischer receive?
He was awarded the 1902 Nobel Prize in Chemistry for his work on sugar and purine syntheses.
Did Emil Fischer develop barbiturates?
Yes, he worked with Josef von Mering to launch the first barbiturate sedative, barbital, in 1904.
Achievements
- Nobel Prize in Chemistry — 1902
- Affiliated with Ludwig-Maximilians-Universität München, University of Würzburg and Humboldt-Universität zu Berlin
- Educated at University of Bonn and University of Strasbourg
- Worked as biochemist, chemist and university teacher
