Sir Richard Timothy Hunt,  (born 19 February 1943) is a British biochemist and molecular physiologist. He was awarded the 2001 Nobel Prize in Physiology or Medicine with Paul Nurse and Leland H. Hartwell for their discoveries of protein molecules that control the division of cells. While studying fertilized sea urchin eggs in the early 1980s, Hunt discovered cyclin, a protein that cyclically aggregates and is depleted during cell division cycles.

Early life and education 
Hunt was born on 19 February 1943 in Neston, Cheshire, to Richard William Hunt, a lecturer in palaeography in Liverpool, and Kit Rowland, daughter of a timber merchant. After the death of both his parents, Hunt found his father had worked at Bush House, then the headquarters of BBC World Service radio, most likely in intelligence, although it is not known what he actually did. In 1945, Richard became Keeper of the Western Manuscripts at the Bodleian Library, and the family relocated to Oxford. At the age of eight, Hunt was accepted into the Dragon School, where he first developed an interest in biology thanks to his German teacher, Gerd Sommerhoff. When he was fourteen, he moved to Magdalen College School, Oxford, where the science prizes now bear his name, becoming even more interested in science and studying subjects such as chemistry and zoology.

In 1961, he was accepted into Clare College, Cambridge to study Natural Sciences, graduating in 1964 and immediately beginning work in the university Department of Biochemistry under Asher Korner. There, he worked with scientists such as Louis Reichardt and Tony Hunter. A 1965 talk by Vernon Ingram interested him in haemoglobin synthesis, and at a Greek conference in 1966 on the subject, he persuaded the haematologist and geneticist Irving London to allow him to work in his laboratory at Albert Einstein College of Medicine in New York, staying from July to October 1966. His PhD was supervised by Asher Korner and focused on haemoglobin synthesis in intact rabbit reticulocytes (immature red blood cells), and was awarded in 1968.

Career and research

Early career
Following his PhD, Hunt returned to New York to work with London, in collaboration with Nechama Kosower, her husband Edward Kosower, and Ellie Ehrenfeld. While there, they discovered that tiny amounts of glutathione inhibited protein synthesis in reticulocytes and that tiny amounts of RNA killed the synthesis altogether. After returning to Cambridge, he again began work with Tony Hunter and Richard Jackson, who had discovered the RNA strand used to start haemoglobin synthesis. After 3–4 years, the team discovered at least two other chemicals acting as inhibitors.

Hunt regularly spent summers working at the Marine Biological Laboratory at Woods Hole, Massachusetts, which was popular with scientists for its advanced summer courses, and in particular, with those interested in the study of mitosis. The location provided a ready supply of surf clams and sea urchins amongst the reefs and fishing docks, and it was these invertebrates that were particularly useful for the study of the synthesis of proteins in embryogenesis, as the embryos were simply generated with the application of filtered sea water, and the transparency of the embryo cells was well suited to microscopic study.

Discovery of cyclins
It was at Woods Hole in the Summer of 1982, using the sea urchin (Arbacia punctulata) egg as his model organism, that he discovered the cyclin molecule. Hunt was a keen cyclist and named the protein based on his observation of the cyclical changes in its levels.

Cyclins are proteins that play a key role in regulating the cell-division cycle. Hunt found that cyclins begin to be synthesised after the eggs are fertilised and increase in levels during interphase, until they drop very quickly in the middle of mitosis in each cell division. He also found that cyclins are present in vertebrate cells, where they also regulate the cell cycle. He and others subsequently showed that cyclins bind and activate a family of protein kinases, now called the cyclin-dependent kinases, one of which had been identified as a crucial cell cycle regulator by Paul Nurse. The cyclin mechanism of cell division is fundamental to all living organisms (excluding bacteria) and thus the study of the process in simple organisms helps shed light on the growth of tumours in humans.

Later career
In 1990, he began work at Imperial Cancer Research Fund, later known as the Cancer Research UK London Research Institute, in the United Kingdom, where his work focused on understanding on what makes cell go cancerous, that is: proliferate uncontrollably, with the ordinary inhibitory signals switched off. Hunt had his own laboratory at the Clare Hall Laboratories until the end of 2010, and remains an Emeritus Group Leader at the Francis Crick Institute.  He is a member of the Advisory Council for the Campaign for Science and Engineering.  He has served on the Selection Committee for the Shaw Prize in Life Science and Medicine. In 2010, Hunt joined the Academic Advisory Board of the Austrian think tank Academia Superior, Institute for Future Studies.

Hunt is a highly regarded colleague and mentor in the research community. During his career he has supervised numerous PhD students including Hugh Pelham and Jonathon Pines.

Science advocacy
In addition to his scientific contributions, Hunt is a lifelong advocate for scientific research. After winning the Nobel Prize in 2001, he spent much of his time traveling the world, talking to both popular and specialist audiences. In these talks he offered his characteristic perspective on inquiry, which emphasizes the importance of having fun and being lucky. He also believes that science benefits when power is given to young people.

Controversy

In June 2015, Hunt became the target of an online shaming campaign after remarks he made at a science journalism conference were construed as sexist. The pressure of the controversy forced his resignation from several key research and policy positions, including the European Research Council, and a temporary withdrawal from public life and professional activities.

Awards and honours 
Hunt was elected a member of the European Molecular Biology Organization (EMBO) in 1978, serving as a member of the organisation's Fellowship Committee 1990–1993, its Meeting Committee 2008–2009, and its governing body, the Council, 2004–2009. He was elected a Fellow of the Royal Society (FRS) in 1991, his certificate of election reads:

Hunt was elected a fellow of the UK's Academy of Medical Sciences (FMedSci) in 1998, and a foreign associate of the US National Academy of Sciences in 1999.

In 2001, he was awarded the Nobel Prize in Physiology or Medicine with Leland Hartwell and Paul Nurse for their discoveries regarding cell cycle regulation by cyclin and cyclin-dependent kinases. The three laureates are cited "for their discoveries of key regulators of the cell cycle," while Hunt in particular 

In 2003, Hunt was made an honorary Fellow of the Royal Society of Edinburgh (HonFRSE). In 2006, he was awarded the Royal Society's Royal Medal, two of which are presented annually for "the most important contributions to the advancement of natural knowledge", in his case for "discovering a key aspect of cell cycle control, the protein cyclin which is a component of cyclin dependent kinases, demonstrating his ability to grasp the significance of the result outside his immediate sphere of interest".

Hunt was knighted in the 2006 Birthday Honours for his service to science.

Personal life
Hunt is married to the immunologist Mary Collins, who was provost of the Okinawa Institute of Science and Technology in Japan, and is now Director of the Blizard Institute Queen Mary University of London. The couple have two daughters.

Selected publications

References

External links
Since winning the Nobel Prize in Physiology or Medicine in 2001, Hunt has lectured regularly about the joys of scientific discovery. 

At the 2010 Lindau Meeting, Hunt participated in a  Nature video about systems biology.
"Meeting the 'systems' skeptic – with Tim Hunt"
In July 2015, the historian/anthropologist Alan Macfarlane conducted two in-depth interviews with Tim Hunt:
– Part One, 7 July
– Part Two, 28 July
  including the Nobel Lecture 9 December 2001 Protein Synthesis, Proteolysis, and Cell Cycle Transitions

1943 births
Living people
People from Neston
People educated at The Dragon School
People educated at Magdalen College School, Oxford
Alumni of Clare College, Cambridge
Fellows of Clare College, Cambridge
English biochemists
English biologists
Members of the European Molecular Biology Organization
Fellows of the Royal Society
Royal Medal winners
Knights Bachelor
English Nobel laureates
British Nobel laureates
Nobel laureates in Physiology or Medicine
Foreign associates of the National Academy of Sciences
Fellows of the Academy of Medical Sciences (United Kingdom)
Academics of the Francis Crick Institute