Francis Crick
Francis Harry Compton Crick OM FRS[1][2] (8 June 1916 – 28 July 2004) was an English molecular biologist, biophysicist, and neuroscientist. He, James Watson, Rosalind Franklin, and Maurice Wilkins played crucial roles in deciphering the helical structure of the DNA molecule.
Francis Crick
28 July 2004 (aged 88)
3
- FRS (1959)[1][2]
- Albert Lasker Award for Basic Medical Research (1960)
- Gairdner Foundation International Award (1962)
- Nobel Prize (1962)
- EMBO Membership (1964)[3]
- Mendel Medal (1966)
- Foreign Associate of the National Academy of Sciences (1969)
- Royal Medal (1972)
- Copley Medal (1975)
- Sir Hans Krebs Medal (1977)
- Albert Medal (1987)
- Golden Plate Award of the American Academy of Achievement[4] (1987)
- Order of Merit (1991)
- University of Cambridge
- University College London
- Cavendish Laboratory
- Laboratory of Molecular Biology
- Salk Institute for Biological Studies
None[5]
Crick and Watson's paper in Nature in 1953 laid the groundwork for understanding DNA structure and functions. Together with Maurice Wilkins, they were jointly awarded the 1962 Nobel Prize in Physiology or Medicine "for their discoveries concerning the molecular structure of nucleic acids and its significance for information transfer in living material".[5][6]
Crick was an important theoretical molecular biologist and played a crucial role in research related to revealing the helical structure of DNA. He is widely known for the use of the term "central dogma" to summarise the idea that once information is transferred from nucleic acids (DNA or RNA) to proteins, it cannot flow back to nucleic acids. In other words, the final step in the flow of information from nucleic acids to proteins is irreversible.[7]
During the remainder of his career, he held the post of J.W. Kieckhefer Distinguished Research Professor at the Salk Institute for Biological Studies in La Jolla, California. His later research centered on theoretical neurobiology and attempts to advance the scientific study of human consciousness. He remained in this post until his death; "he was editing a manuscript on his death bed, a scientist until the bitter end" according to Christof Koch.[8]
Early life and education[edit]
Crick was the first son of Harry Crick and Annie Elizabeth Crick (née Wilkins). He was born on 8 June 1916[2] and raised in Weston Favell, then a small village near the English town of Northampton, in which Crick's father and uncle ran the family's boot and shoe factory. His grandfather, Walter Drawbridge Crick, an amateur naturalist, wrote a survey of local foraminifera (single-celled protists with shells), corresponded with Charles Darwin,[9] and had two gastropods (snails or slugs) named after him.
At an early age, Francis was attracted to science and what he could learn about it from books. As a child, he was taken to church by his parents. But by about age 12, he said he did not want to go any more as he preferred a scientific search for answers over religious belief.[10]
Walter Crick, his uncle, lived in a small house on the south side of Abington Avenue; he had a shed at the bottom of his little garden where he taught Crick to blow glass, do chemical experiments and to make photographic prints. When he was eight or nine he transferred to the most junior form of the Northampton Grammar School, on the Billing Road. This was about 1.25 mi (2 km) from his home so he could walk there and back, by Park Avenue South and Abington Park Crescent, but he more often went by bus or, later, by bicycle. The teaching in the higher forms was satisfactory, but not as stimulating. After the age of 14, he was educated at Mill Hill School in London (on a scholarship), where he studied mathematics, physics, and chemistry with his best friend John Shilston. He shared the Walter Knox Prize for Chemistry on Mill Hill School's Foundation Day, Friday, 7 July 1933. He declared that his success was founded on the quality of teaching he received whilst a pupil at Mill Hill.
Crick studied at University College London (UCL), a constituent college of the University of London[11] and earned a Bachelor of Science degree awarded by the University of London in 1937. Crick began a PhD at UCL, but was interrupted by World War II. He later became a PhD student[12] and Honorary Fellow of Gonville and Caius College, Cambridge and mainly worked at the Cavendish Laboratory and the Medical Research Council (MRC) Laboratory of Molecular Biology in Cambridge. He was also an Honorary Fellow of Churchill College, Cambridge, and of University College, London.
Crick began a PhD research project on measuring the viscosity of water at high temperatures (which he later described as "the dullest problem imaginable"[13]) in the laboratory of physicist Edward Neville da Costa Andrade at University College London, but with the outbreak of World War II (in particular, an incident during the Battle of Britain when a bomb fell through the roof of the laboratory and destroyed his experimental apparatus),[5] Crick was deflected from a possible career in physics. During his second year as a PhD student, however, he was awarded the Carey Foster Research Prize, a great honour.[14] He did postdoctoral work at the Brooklyn Collegiate and Polytechnic Institute,[15] now part of the New York University Tandon School of Engineering.
During World War II, he worked for the Admiralty Research Laboratory, from which many notable scientists emerged, including David Bates, Robert Boyd, Thomas Gaskell, George Deacon, John Gunn, Harrie Massey, and Nevill Mott;[16] he worked on the design of magnetic and acoustic mines and was instrumental in designing a new mine that was effective against German minesweepers.[17]
Post-World War Two life and work[edit]
In 1947, aged 31, Crick began studying biology and became part of an important migration of physical scientists into biology research. This migration was made possible by the newly won influence of physicists such as Sir John Randall, who had helped win the war with inventions such as radar. Crick had to adjust from the "elegance and deep simplicity" of physics to the "elaborate chemical mechanisms that natural selection had evolved over billions of years." He described this transition as, "almost as if one had to be born again". According to Crick, the experience of learning physics had taught him something important—hubris—and the conviction that since physics was already a success, great advances should also be possible in other sciences such as biology. Crick felt that this attitude encouraged him to be more daring than typical biologists who tended to concern themselves with the daunting problems of biology and not the past successes of physics.
For the better part of two years, Crick worked on the physical properties of cytoplasm at Cambridge's Strangeways Research Laboratory, headed by Honor Bridget Fell, with a Medical Research Council studentship, until he joined Max Perutz and John Kendrew at the Cavendish Laboratory. The Cavendish Laboratory at Cambridge was under the general direction of Sir Lawrence Bragg, who had won the Nobel Prize in 1915 at the age of 25. Bragg was influential in the effort to beat a leading American chemist, Linus Pauling, to the discovery of DNA's structure (after having been pipped at the post by Pauling's success in determining the alpha helix structure of proteins). At the same time Bragg's Cavendish Laboratory was also effectively competing with King's College London, whose Biophysics department was under the direction of Randall. (Randall had refused Crick's application to work at King's College.) Francis Crick and Maurice Wilkins of King's College were personal friends, which influenced subsequent scientific events as much as the close friendship between Crick and James Watson. Crick and Wilkins first met at King's College and not, as erroneously recorded by two authors, at the Admiralty during World War II.
Crick married twice and fathered three children; his brother Anthony (born in 1918) predeceased him in 1966.[18]
Spouses:
Children:
Crick died of colon cancer on the morning of 28 July 2004[2] at the University of California, San Diego (UCSD) Thornton Hospital in La Jolla; he was cremated and his ashes were scattered into the Pacific Ocean. A public memorial was held on 27 September 2004 at the Salk Institute, La Jolla, near San Diego, California; guest speakers included James Watson, Sydney Brenner, Alex Rich, Seymour Benzer, Aaron Klug, Christof Koch, Pat Churchland, Vilayanur Ramachandran, Tomaso Poggio, Leslie Orgel, Terry Sejnowski, his son Michael Crick, and his younger daughter Jacqueline Nichols.[19] A private memorial for family and colleagues was held on 3 August 2004.
Crick's Nobel Prize medal and diploma from the Nobel committee was sold at auction in June 2013 for $2,270,000. It was bought by Jack Wang, the CEO of Chinese medical company Biomobie.[20][21] 20% of the sale price of the medal was donated to the Francis Crick Institute in London.[21]
Directed panspermia[edit]
During the 1960s, Crick became concerned with the origins of the genetic code. In 1966, Crick took the place of Leslie Orgel at a meeting where Orgel was to talk about the origin of life. Crick speculated about possible stages by which an initially simple code with a few amino acid types might have evolved into the more complex code used by existing organisms.[111] At that time, proteins were thought to be the only kind of enzyme, and ribozymes had not yet been identified. Many molecular biologists were puzzled by the problem of the origin of a protein replicating system that is as complex as that which exists in organisms currently inhabiting Earth. In the early 1970s, Crick and Orgel further speculated about the possibility that the production of living systems from molecules may have been a very rare event in the universe, but once it had developed it could be spread by intelligent life forms using space travel technology, a process they called "directed panspermia".[112] In a retrospective article,[113] Crick and Orgel noted that they had been unduly pessimistic about the chances of abiogenesis on Earth when they had assumed that some kind of self-replicating protein system was the molecular origin of life.
In 1976, Crick addressed the origin of protein synthesis in a paper with Sydney Brenner, Aaron Klug, and George Pieczenik.[114] In this paper, they speculate that code constraints on nucleotide sequences allow protein synthesis without the need for a ribosome. It, however, requires a five base binding between the mRNA and tRNA with a flip of the anti-codon creating a triplet coding, even though it is a five-base physical interaction. Thomas H. Jukes pointed out that the code constraints on the mRNA sequence required for this translation mechanism is still preserved.[115]
Crick's period at Cambridge was the pinnacle of his long scientific career, but he left Cambridge in 1977 after 30 years, having been offered (and having refused) the Mastership of Gonville and Caius. James Watson claimed at a Cambridge conference marking the 50th anniversary of the discovery of the structure of DNA in 2003:
The apparently "pretty well kept secret" had already been recorded in Soraya De Chadarevian's Designs For Life: Molecular Biology After World War II, published by Cambridge University Press in 2002. His major contribution to molecular biology in Cambridge is well documented in The History of the University of Cambridge: Volume 4 (1870 to 1990), which was published by CUP in 1992.
According to the University of Cambridge's genetics department official website, the electors of the professorship could not reach consensus, prompting the intervention of then University Vice-Chancellor Lord Adrian. Lord Adrian first offered the professorship to a compromise candidate, Guido Pontecorvo, who refused, and is said to have offered it then to Crick, who also refused.
In 1976, Crick took a sabbatical year at the Salk Institute for Biological Studies in La Jolla, California. Crick had been a nonresident fellow of the Institute since 1960. Crick wrote, "I felt at home in Southern California."[116] After the sabbatical, Crick left Cambridge to continue working at the Salk Institute. He was also an adjunct professor at the University of California, San Diego.[117][118][119] He taught himself neuroanatomy and studied many other areas of neuroscience research. It took him several years to disengage from molecular biology because exciting discoveries continued to be made, including the discovery of alternative splicing and the discovery of restriction enzymes, which helped make possible genetic engineering. Eventually, in the 1980s, Crick was able to devote his full attention to his other interest, consciousness. His autobiographical book, What Mad Pursuit: A Personal View of Scientific Discovery, includes a description of why he left molecular biology and switched to neuroscience.
Upon taking up work in theoretical neuroscience, Crick was struck by several things:
Crick hoped he might aid progress in neuroscience by promoting constructive interactions between specialists from the many different subdisciplines concerned with consciousness. He also collaborated with neurophilosophers such as Patricia Churchland. In 1983, as a result of their studies of computer models of neural networks, Crick and Mitchison proposed that the function of REM sleep and dreaming is to remove certain modes of interactions in networks of cells in the mammalian cerebral cortex; they called this hypothetical process "reverse learning" or "unlearning". In the final phase of his career, Crick established a collaboration with Christof Koch that led to publication of a series of articles on consciousness during the period spanning from 1990[120] to 2005. Crick made the strategic decision to focus his theoretical investigation of consciousness on how the brain generates visual awareness within a few hundred milliseconds of viewing a scene. Crick and Koch proposed that consciousness seems so mysterious because it involves very short-term memory processes that are as yet poorly understood. In his book The Astonishing Hypothesis, Crick described how neurobiology had reached a mature enough stage so that consciousness could be the subject of a unified effort to study it at the molecular, cellular and behavioural levels. Crick was sceptical about the value of computational models of mental function that are not based on details about brain structure and function.
Crick was aware that research on consciousness was a difficult task, as he wrote to Martynas Yčas in April 1996:
Crick papers
Audio and video files
About his work
About his life
Miscellaneous