- Born:
- Nov. 9, 1952, London, Eng. (age 74)
- Awards And Honors:
- Nobel Prize (2009)
- Subjects Of Study:
- DNA
- RNA
- Tetrahymena
- recombination
- telomerase
- telomere
- yeast artificial chromosome
Jack W. Szostak
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Who is Jack W. Szostak?
Jack W. Szostak, born in London in 1952, is an English-born American biochemist and geneticist. He was awarded the 2009 Nobel Prize in Physiology or Medicine with Elizabeth H. Blackburn and Carol W. Greider for discovering the function of telomeres, which play a vital role in determining a cell's life span.
Szostak's research also explored chromosomal recombination during cell division and the role of RNA in early life on Earth. In 1983, he was the first to create a yeast artificial chromosome, which can clone DNA using a vector molecule containing yeast genes and a DNA segment of interest. By 1991, Szostak shifted his research to RNA and its role in evolution, with the goal of synthesizing a self-replicating protocell susceptible to Darwinian evolution.
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What fields of science does Jack W. Szostak work in?
Jack W. Szostak is an English-born American biochemist and geneticist who won the 2009 Nobel Prize for Physiology or Medicine with Elizabeth H. Blackburn and Carol W. Greider.
Szostak's work includes:
* Discoveries concerning the function of telomeres
* Investigations into chromosomal recombination during cell division
* Studies into the role of RNA in the evolution of life on early Earth
* Creating a yeast artificial chromosome (1983), which can be used to clone DNA and consists of a vector (or carrier) molecule that contains yeast genes necessary for replication and a DNA segment of interest1 Britannica SourceCreated from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles. -
What is Jack W. Szostak best known for in his scientific career?
Jack W. Szostak is an English-born American biochemist and geneticist known for his work on telomeres, which are segments of DNA at the ends of chromosomes that determine a cell's life span. For his discoveries concerning the function of telomeres, he shared the 2009 Nobel Prize for Physiology or Medicine with Elizabeth H. Blackburn and Carol W. Greider.
Szostak also researched chromosomal recombination during cell division and the role of RNA in the evolution of early life on Earth. Additionally, he was the first to create a yeast artificial chromosome in 1983, which can clone DNA and consists of a vector molecule that contains yeast genes necessary for replication and a DNA segment of interest.
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What are telomeres, and how did Szostak's research contribute to understanding them?
Telomeres are segments of DNA at the ends of chromosomes in eukaryotic cells. They consist of repeated DNA sequences that shorten with each cell replication, eventually leading to cell death.
Jack W. Szostak, along with Elizabeth H. Blackburn and Carol W. Greider, won the 2009 Nobel Prize for Physiology or Medicine for discoveries concerning telomeres and their function. Szostak's work in yeast showed that the loss of telomerase activity leads to premature cell aging and death, linking telomeres to the aging process. Szostak met Blackburn in 1980, and they discovered that yeast used foreign telomeres as its own, indicating a cellular mechanism exists for telomere maintenance.
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What important award did Jack W. Szostak receive for his work?
Jack W. Szostak, an English-born American biochemist and geneticist, received the 2009 Nobel Prize for Physiology or Medicine along with Elizabeth H. Blackburn and Carol W. Greider, for his discoveries concerning the function of telomeres. Telomeres are segments of DNA at the ends of chromosomes that play a vital role in determining cell lifespan.
Szostak's work also includes investigations into chromosomal recombination during cell division and studies on the role of RNA in the evolution of life on early Earth. In addition to the Nobel Prize, he received the Albert Lasker Basic Medical Research Award in 2006, also shared with Blackburn and Greider.
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How has Jack W. Szostak's research on the origin of life influenced science today?
Jack W. Szostak's research significantly influences science today, particularly in understanding the origins of life. His Nobel Prize-winning work on telomeres revealed their role in cell lifespan, linking telomerase activity to aging and cell death. Szostak's creation of the first yeast artificial chromosome enabled DNA cloning, while his focus shift in 1991 explored RNA's evolutionary role, synthesizing functional RNAs to model the transition from chemical to biological life on early Earth. His work aims to create a self-replicating protocell susceptible to Darwinian evolution, impacting origins of life research.
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Jack W. Szostak (born Nov. 9, 1952, London, Eng.) is an English-born American biochemist and geneticist who was awarded the 2009 Nobel Prize for Physiology or Medicine, along with American molecular biologists Elizabeth H. Blackburn and Carol W. Greider, for his discoveries concerning the function of telomeres (segments of DNA occurring at the ends of chromosomes), which play a vital role in determining cell life span. Szostak also investigated the process of chromosomal recombination during cell division and conducted studies into the role of RNA in the evolution of life on early Earth.
Szostak received a bachelor’s degree in cell biology from McGill University in Montreal in 1972 and received a Ph.D. in biochemistry from Cornell University in Ithaca, N.Y., in 1977. After working as a research associate at Cornell from 1977 to 1979, Szostak took a position as assistant professor in the department of biological chemistry of the Sidney Farber Cancer Institute (now the Dana-Farber Cancer Institute) at Harvard Medical School. His early research was concerned with the process of genetic recombination during a form of cell division called meiosis. During each round of division, cells lose some genetic material, but they do not lose functional genes. Szostak suspected that there exists some protective mechanism that prevents the loss of vital genetic information during division, and he centred his investigations on telomeres.
In 1980 Szostak met Blackburn, who had elucidated the genetic sequence of telomeres in the protozoan Tetrahymena. Szostak was researching telomeres in yeast, and he and Blackburn decided to conduct an experiment in which Tetrahymena telomeres were attached to the ends of yeast chromosomes. The researchers discovered that the yeast utilized the foreign telomeres as though they were the yeast’s own. The yeast also added its own telomere DNA to the Tetrahymena DNA, indicating that a cellular mechanism exists for telomere maintenance. Blackburn and Greider, then a graduate student in Blackburn’s laboratory, later discovered that this maintenance process is regulated by an enzyme called telomerase. Szostak’s later work in yeast demonstrated that the loss of telomerase activity leads to premature cell aging and cell death, providing the initial link between telomeres and the aging process.
Szostak remained at Harvard Medical School, becoming associate professor in the department of biological chemistry (1983–84), associate professor in the department of genetics (1984–87), and finally professor in the department of genetics (1988– ). He also held a position in the department of molecular biology at Massachusetts General Hospital. In addition to Szostak’s investigations into telomeres, he was the first to create a yeast artificial chromosome (1983), which can be used to clone DNA and consists of a vector (or carrier) molecule that contains yeast genes necessary for replication and a DNA segment of interest.
By 1991 Szostak had shifted the focus of his research to RNA and its role in evolution. Using only simple molecules, he developed techniques to generate functional RNAs in a test tube. The goal of this research was to synthesize a self-replicating protocell susceptible to Darwinian evolution, which could then serve as a model to investigate the transition from chemical to biological life on early Earth.
Szostak later obtained U.S. citizenship, and in 1998 he became a Howard Hughes Medical Institute investigator and was elected a member of the National Academy of Sciences. He was also elected a member of the American Academy of Arts and Sciences and a fellow of the New York Academy of Sciences. In addition to the 2009 Nobel Prize, he received a variety of other awards during his career, including the Albert Lasker Basic Medical Research Award in 2006 (shared with Blackburn and Greider).