Jack Szostak | |
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Born | Jack William Szostak November 9, 1952 |
Citizenship | Canada, United States |
Alma mater | McGill University (BSc) Cornell University (PhD) |
Awards |
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Scientific career | |
Fields | Biochemistry Genetics Synthetic Biology Bioengineering |
Institutions | University of Chicago (2022) Harvard Medical School Howard Hughes Medical Institute |
Thesis | Specific binding of a synthetic oligonucleotide to the yeast iso-1 cytochrome c̲ mRNA and gene (1977) |
Doctoral advisor | Ray Wu |
Notable students | David Bartel Jennifer Doudna Hiroaki Suga Neha Kamat Terry Orr-Weaver [1] |
Website | molbio |
Jack William Szostak FRS (born November 9, 1952) [2] is a Canadian American [3] biologist of Polish British descent, Nobel Prize laureate, University Professor at the University of Chicago, former Professor of Genetics at Harvard Medical School, and Alexander Rich Distinguished Investigator at Massachusetts General Hospital, Boston. Szostak has made significant contributions to the field of genetics. His achievement helped scientists to map the location of genes in mammals and to develop techniques for manipulating genes. His research findings in this area are also instrumental to the Human Genome Project. He was awarded the 2009 Nobel Prize for Physiology or Medicine, along with Elizabeth Blackburn and Carol W. Greider, for the discovery of how chromosomes are protected by telomeres.
Szostak grew up in Montreal and Ottawa. Although Szostak does not speak Polish, he stated in an interview with Wprost weekly that he remembers his Polish roots. [4] He attended Riverdale High School (Quebec) and graduated at the age of 15 with the scholars prize. [5] He graduated with a B.Sc in cell biology from McGill University at the age of 19. In 1970, as an undergraduate, he participated in The Jackson Laboratory's Summer Student Program under the mentorship of Dr. Chen K. Chai. He completed his PhD in biochemistry at Cornell University (advisor Prof. Ray Wu [6] ) before moving to Harvard Medical School to start his own lab at the Sidney Farber Cancer Institute. He credits Ruth Sager for giving him his job there when he had little yet to show. In 1984 Howard Goodman recruited him to Massachusetts General Hospital and the Department of Molecular Biology. He was granted tenure and a full professorship at Harvard Medical School in 1988. In 2022, he moved to the University of Chicago as a university professor in the Department of Chemistry and the College. [7]
Szostak has made contributions to the field of genetics. He is credited with the construction of the world's first yeast artificial chromosome. That achievement helped scientists to map the location of genes in mammals and to develop techniques for manipulating genes. His achievements in this area are also instrumental to the Human Genome Project.
His discoveries have helped to clarify the events that lead to chromosomal recombination—the reshuffling of genes that occurs during meiosis—and the function of telomeres, the specialized DNA sequences at the tips of chromosomes.
In the early 90s his laboratory shifted its research direction and focused on studying RNA enzymes, which had been recently discovered by Cech and Altman. He developed the technique of in vitro evolution of RNA (also developed independently by Gerald Joyce) which enables the discovery of RNAs with desired functions through successive cycles of selection, amplification and mutation. He isolated the first aptamer (term he used for the first time). He isolated RNA enzymes with RNA ligase activity directly from random sequence (project of David Bartel).
Currently, his lab focuses on the challenges of understanding the origin of life on Earth, and the construction of artificial cellular life in the laboratory. [8] They have conducted detailed studies of mechanisms by which RNA templates may have replicated on early Earth before the emergence of enzyme catalysts. In particular, they have focused on imidazole-activated ribonucleotides (phosphorimidazolides) as monomers capable of elongating a new RNA strand. [9] Significantly, the Szostak group discovered that phosphorimidazolide-mediated template elongation occurs via 5'-5'-imidazolium bridged dinucleotide intermediates [10] which accelerate polymerization. Phosphorimidazolides were first proposed to be critical for early-Earth nucleotide polymerization by Leslie E. Orgel and colleagues.
Szostak and Katarzyna Adamala demonstrated that the issues of a degrading effect of magnesium ions on RNA and the disruption of a fatty acid membrane by magnesium ions can be simultaneously solved by the presence of weak cation chelator like citric acid in primitive protocells. [11]
Beyond his research, he has delivered talks about the origin of life on Earth, as he did at the first Starmus Festival in the Canary Islands, in 2011. He subsequently joined the Starmus Board of Directors, and his 2011 lecture was published in the book Starmus: 50 Years of Man in Space. [12]
In September 2022, Szostak joined the faculty of the University of Chicago as university professor, leading a new interdisciplinary program called the Origins of Life Initiative. [13]
Szostak has received several awards and honors for his contributions. He is a member of the National Academy of Sciences, American Academy of Arts and Sciences and New York Academy of Sciences, the American Philosophical Society, [14] and is a member of the Kosciuszko Foundation Collegium of Eminent Scientists of Polish Origin and Ancestry. [15]
He has received the following awards:
An organism's genes are stored within DNA molecules, which are found in chromosomes inside its cells' nuclei. When a cell divides, it is important that its chromosomes are copied in full, and that they are not damaged. At each end of a chromosome lies a "cap" or telomere, as it is known, which protects it. After Elizabeth Blackburn discovered that telomeres have a particular DNA, through experiments conducted on ciliates and yeast, she and Jack Szostak proved in 1982 that the telomeres' DNA prevents chromosomes from being broken down,
according to the statement released by the Alfred Nobel Foundation. [16]
Szostak was married to Terri-Lynn McCormick and has two sons. [17] He has two sisters, Carolyn Szostak and Kathy Hysen. [18]
Walter Gilbert is an American biochemist, physicist, molecular biology pioneer, and Nobel laureate.
A telomere is a region of repetitive nucleotide sequences associated with specialized proteins at the ends of linear chromosomes. Telomeres are a widespread genetic feature most commonly found in eukaryotes. In most, if not all species possessing them, they protect the terminal regions of chromosomal DNA from progressive degradation and ensure the integrity of linear chromosomes by preventing DNA repair systems from mistaking the very ends of the DNA strand for a double-strand break.
Telomerase, also called terminal transferase, is a ribonucleoprotein that adds a species-dependent telomere repeat sequence to the 3' end of telomeres. A telomere is a region of repetitive sequences at each end of the chromosomes of most eukaryotes. Telomeres protect the end of the chromosome from DNA damage or from fusion with neighbouring chromosomes. The fruit fly Drosophila melanogaster lacks telomerase, but instead uses retrotransposons to maintain telomeres.
Molecular genetics is a branch of biology that addresses how differences in the structures or expression of DNA molecules manifests as variation among organisms. Molecular genetics often applies an "investigative approach" to determine the structure and/or function of genes in an organism's genome using genetic screens.
Cold Spring Harbor Laboratory (CSHL) is a private, non-profit institution with research programs focusing on cancer, neuroscience, plant biology, genomics, and quantitative biology. It is located in Laurel Hollow on Long Island, New York.
Elizabeth Helen Blackburn is an Australian-American Nobel laureate who is the former president of the Salk Institute for Biological Studies. In 1984, Blackburn co-discovered telomerase, the enzyme that replenishes the telomere, with Carol W. Greider. For this work, she was awarded the 2009 Nobel Prize in Physiology or Medicine, sharing it with Carol W. Greider and Jack W. Szostak, becoming the first Australian woman Nobel laureate.
Thomas Robert Cech is an American chemist who shared the 1989 Nobel Prize in Chemistry with Sidney Altman for their discovery of the catalytic properties of RNA. Cech discovered that RNA could itself cut strands of RNA, suggesting that life might have started as RNA. He found that RNA can not only transmit instructions, but that it can act as a speed up the necessary reactions.
Mario Ramberg Capecchi is an Italian-born molecular geneticist and a co-awardee of the 2007 Nobel Prize in Physiology or Medicine for discovering a method to create mice in which a specific gene is turned off, known as knockout mice. He shared the prize with Martin Evans and Oliver Smithies. He is currently Distinguished Professor of Human Genetics and Biology at the University of Utah School of Medicine.
Homologous recombination is a type of genetic recombination in which genetic information is exchanged between two similar or identical molecules of double-stranded or single-stranded nucleic acids.
Andrew Zachary Fire is an American biologist and professor of pathology and of genetics at the Stanford University School of Medicine. He was awarded the 2006 Nobel Prize in Physiology or Medicine, along with Craig C. Mello, for the discovery of RNA interference (RNAi). This research was conducted at the Carnegie Institution of Washington and published in 1998.
Carolyn Widney Greider is an American molecular biologist and Nobel laureate. She is a Distinguished Professor of Molecular, Cell, and Developmental Biology at the University of California, Santa Cruz.
Alexey Matveyevich Olovnikov was a Russian biologist. Among other things, in 1971, he was the first to recognize the problem of telomere shortening, to predict the existence of telomerase, and to suggest the telomere hypothesis of aging and the relationship of telomeres to cancer.
Michael Morris Rosbash is an American geneticist and chronobiologist. Rosbash is a professor and researcher at Brandeis University and investigator at the Howard Hughes Medical Institute. Rosbash's research group cloned the Drosophila period gene in 1984 and proposed the Transcription Translation Negative Feedback Loop for circadian clocks in 1990. In 1998, they discovered the cycle gene, clock gene, and cryptochrome photoreceptor in Drosophila through the use of forward genetics, by first identifying the phenotype of a mutant and then determining the genetics behind the mutation. Rosbash was elected to the National Academy of Sciences in 2003. Along with Michael W. Young and Jeffrey C. Hall, he was awarded the 2017 Nobel Prize in Physiology or Medicine "for their discoveries of molecular mechanisms controlling the circadian rhythm".
Michael Warren Young is an American biologist and geneticist. He has dedicated over three decades to research studying genetically controlled patterns of sleep and wakefulness within Drosophila melanogaster.
Bryant Villeponteau is an American scientist, entrepreneur, and longevity expert who has worked in both academia and industry.
Terry L. Orr-Weaver is an American molecular biologist in the MIT Department of Biology with a joint appointment to the Whitehead Institute. She does research on developmental biology, with a focus on "[c]oordination of cell growth and division with development, with particular focus on the oocyte-to-embryo transition, control of cell size, and regulation of metazoan DNA replication." Orr-Weaver and her collaborators have identified two proteins necessary for the proper sorting of chromosomes during meiosis with implications for cancer and birth defects. In 2006 she was elected to the National Academy of Sciences.
Victoria Lundblad is an American geneticist whose work focuses on the genetic control of chromosome behavior in yeast. Many of her discoveries have concerned telomerase, the RNA-containing enzyme that completes the ends of chromosomes. She works at the Salk Institute in La Jolla, California.
Katarzyna (Kate) P Adamala is an American synthetic biologist and a professor of genetics at the University of Minnesota.