Share on Facebook Share on Twitter Email
Answers.com

Arthur Kornberg

 

(born March 3, 1918, Brooklyn, N.Y., U.S. — died Oct. 26, 2007, Stanford, Calif.) U.S. biochemist and physician. He studied at the University of Rochester. In 1959 he joined the faculty at Stanford University. While studying how living organisms manufacture nucleotides, his research led him to the problem of how nucleotides are strung together to form DNA molecules. Adding radioactive nucleotides to an enzyme mixture prepared from cultures of E. coli, he found evidence of a reaction catalyzed by the enzyme that adds nucleotides to a preexisting DNA chain. He was the first to accomplish the cell-free synthesis of DNA. He shared a 1959 Nobel Prize with Severo Ochoa. His son Roger D. Kornberg won the 2006 Nobel Prize for Chemistry.

For more information on Arthur Kornberg, visit Britannica.com.

Search unanswered questions...
Enter a question here...
Search: All sources Community Q&A Reference topics
Scientist: Arthur Kornberg
Top

American biochemist (1918–)

Kornberg was born in Brooklyn, New York, and graduated from the City College of New York in biology and chemistry in 1937. He then studied medicine at Rochester University, gaining his MD in 1941. He joined the National Institutes of Health, Bethesda, where from 1942 to 1953 he directed research on enzymes. During this period he helped elucidate the reactions leading to the formation of two important coenzymes, flavin adenine dinucleotide (FAD) and diphosphopyridine nucleotide (DPN; later renamed nicotinamide adenine dinucleotide – NAD).

From 1953 to 1959 Kornberg was professor of microbiology at Washington University. In 1956, while investigating the synthesis of coenzymes, he discovered an enzyme that catalyzes the formation of polynucleotides from nucleoside triphosphates. This enzyme, which he named DNA polymerase, can be used to synthesize short DNA molecules in a test tube, given the appropriate triphosphate bases and a DNA template. For the discovery and isolation of this enzyme, Kornberg was awarded the 1959 Nobel Prize for physiology or medicine, sharing the award with Severo Ochoa, who discovered the enzyme catalyzing the formation of RNA.

Kornberg was chairman of the biochemistry department at Stanford University from 1959 and his work there has contributed to the understanding of the synthesis of phospholipids and many reactions of the tricarboxylic acid, or Krebs, cycle.

Biography: Arthur Kornberg
Top

The discovery of DNA (deoxyribonucleic acid) polymerase by Arthur Kornberg (born 1918) provides scientists with the tool they need to make copies of DNA.

Arthur Kornberg discovered deoxyribonucleic acid (DNA) polymerase, a natural, chemical tool which scientists could use to make copies of DNA, the giant molecule that carries the genetic information of every living organism. The achievement won him the 1959 Nobel Prize in medicine or physiology (which he shared with Severo Ochoa). Since his discovery, laboratories around the world have used the enzyme to build and study DNA. This has led to a clearer understanding of the biochemical basis of genetics, as well as new strategies for treating cancer and hereditary diseases.

Kornberg was born in Brooklyn, New York, on March 3, 1918, to Joseph Kornberg and Lena Katz. An exceptional student, he graduated at age fifteen from Abraham Lincoln High School. Supported by a scholarship, he enrolled in the premedical program at City College of New York, majoring in biology and chemistry. He received his B.S. in 1937 and entered the University of Rochester School of Medicine. It was here that his interest in medical research blossomed and he became intrigued with the study of enzymes - the protein catalysts of chemical reactions. During his medical studies, Kornberg contracted hepatitis, a disease of the liver that commonly causes jaundice, a yellowing of the skin. The incident prompted him to write his first scientific paper, "The Occurrence of Jaundice in an Otherwise Normal Medical Student."

Kornberg graduated from Rochester in 1941 and began his internship in the university's affiliated institution, Strong Memorial Hospital. At the outbreak of World War II in 1942, he was briefly commissioned a lieutenant junior grade in the United States Coast Guard and then transferred to the United States Public Health Service. From 1942 to 1945, Kornberg served in the nutrition section of the division of physiology at the National Institutes of Health (NIH) in Bethesda, Maryland. He then served as chief of the division's enzymes and metabolism section from 1947 to 1952.

During his years at NIH, Kornberg was able to take several leaves of absence. He honed his knowledge of enzyme production, as well as isolation and purification techniques, in the laboratories of Severo Ochoa at New York University School of Medicine in 1946, of Carl Cori and Gerty Cori at the Washington University School of Medicine in St. Louis in 1947, and of H. A. Barker at the University of California at Berkeley in 1951. Kornberg became an authority on the biochemistry of enzymes, including the production of coenzymes - the proteins that assist enzymes by transferring chemicals from one group of enzymes to another. While at NIH, he perfected techniques for synthesizing the coenzymes diphosphopyridine nucleotide (DPN) and flavin adenine dinucleotide - two enzymes involved in the production of the energy-rich molecules used by the body.

To synthesize coenzymes, Kornberg used a chemical reaction called a condensation reaction, in which phosphate is eliminated from the molecule used to form the enzymes. He later postulated that this reaction was similar to that by which the body synthesizes DNA. The topic of DNA synthesis was of intense interest among researchers at the time, and it closely paralleled his work with enzymes, since DNA controls the biosynthesis of enzymes in cells.

In 1953, Kornberg became professor of microbiology and chief of the department of microbiology at Washington University School of Medicine in St. Louis. That year was a time of great excitement among researchers studying DNA; Francis Crick and James Watson at Cambridge University had just discovered the chemical structure of the DNA molecule. At Washington University, Kornberg's group built on the work of Watson and Crick, as well as techniques Ochoa had developed for synthesizing RNA - the decoded form of DNA that directs the production of proteins in cells. Their goal was to produce a giant molecule of artificial DNA.

The first major discovery they made was the chemical catalyst responsible for the synthesis of DNA. They discovered the enzyme in the common intestinal bacterium Escherichia coli, and Kornberg called it DNA polymerase. In 1957, Kornberg's group used this enzyme to synthesize DNA molecules. Although the molecules were biologically inactive, this was an important achievement; it proved that this enzyme does catalyze the production of new strands of DNA, and it explained how a single strand of DNA acts as a pattern for the formation of a new strand of nucleotides - the building blocks of DNA.

In 1959, Kornberg and Ochoa shared the Nobel Prize for their "discovery of the mechanisms in the biological synthesis of ribonucleic acid and deoxyribonucleic acid." The New York Times quoted Nobel Prize recipient Hugo Theorell as saying that Kornberg's research had "clarified many of the problems of regeneration and the continuity of life."

In the same year he received the prize, Kornberg accepted an appointment as professor of biochemistry and chairman of the department of biochemistry at Stanford University. He continued his research on DNA biosynthesis there with Mehran Goulian. The two researchers were determined to synthesize an artificial DNA that was biologically active, and they were convinced they could overcome the problems which had obstructed previous efforts.

The major problems Kornberg had encountered in his original attempt to synthesize DNA were twofold: the complexity of the DNA template he was working with, and the presence of contaminating enzymes called nucleases which damaged the growing strand of DNA. At Stanford, Kornberg's group succeeded in purifying DNA polymerase of contaminating enzymes, but the complexity of their DNA template remained an obstacle, until Robert L. Sinsheimer of the California Institute of Technology was able to direct them to a simpler one. He had been working with the genetic core of Phi X174, a virus that infects Escherichia coli. The DNA of Phi X174 is a single strand of nitrogenous bases in the form of a ring which, when broken, leaves the DNA without the ability to infect its host.

But if the dilemma of DNA complexity was solved, the solution raised yet another problem. The DNA ring in Phi X174 had to be broken in order to serve as a template. But when the artificial copy of the DNA was synthesized in the test tube, it had to be reformed into a ring in order to acquire infectivity. This next hurdle was overcome by Kornberg's laboratory and other researchers in 1966; they discovered an enzyme called ligase, which closes the ring of DNA. With their new knowledge, Kornberg's group added together the Phi X174 template, four nucleotide subunits of DNA, DNA polymerase, and ligase. The DNA polymerase used the template to build a strand of viral DNA consisting of 6,000 building blocks, and the ligase closed the ring of DNA. The Stanford team then isolated the artificial viral DNA, which represented the infectious, inner core of the virus, and added it to a culture of Escherichia coli cells. The DNA infected the cells, commandeering the cellular machinery that uses genes to make proteins. In only minutes, the infected cells had ceased their normal synthetic activity and begun making copies of Phi X174 DNA.

Kornberg and Goulian announced their success during a press conference on December 14, 1967, pointing out that the achievement would help in future studies of genetics, as well as in the search for cures to hereditary diseases and the control of viral infections. In addition, Kornberg noted that the work might help disclose the most basic processes of life itself. The Stanford researcher has continued to study DNA polymerase to further understanding of the structure of that enzyme and how it works.

Kornberg has used his status as a Nobel Laureate on behalf of various causes. On April 21, 1975, he joined eleven speakers before the Health and Environment Subcommittee of the House Commerce Committee to testify against proposed budget cuts at NIH, including ceilings on salaries and the numbers of personnel. The witnesses also spoke out against the tendency of the federal government to direct NIH to pursue short-term projects at the expense of long-term, fundamental research. During his own testimony, Kornberg argued that NIH scientists and scientists trained or supported by NIH funding "had dominated the medical literature for twenty-five years." His efforts helped prevent NIH from being ravaged by budget cuts and overly influenced by politics.

Later that year, Kornberg also joined other Nobel Prize winners in support of Andrei Sakharov, the Soviet advocate of democratization and human rights who had been denied permission to travel to Sweden to accept the Nobel Prize in physics. Kornberg was among thirty-three Nobel Prize winners to send a cable to Soviet President Nikolai V. Podgorny, asking him to permit Sakharov to receive the prize.

Kornberg received the Paul-Lewis Laboratories Award in Enzyme Chemistry from the American Chemical Society, 1951, the Scientific Achievement Award of the American Medical Association, 1968, the Lucy Wortham James Award of the Society of Medical Oncology, 1968, the Borden Award in the Medical Sciences of the Association of American Medical Colleges, 1968, and the National Medal of Science, 1980. He is a member of the National Academy of Sciences, the American Academy of Arts and Sciences, the American Society of Biological Scientists, and a foreign member of the Royal Society of London. In addition, he is a member of the American Philosophical Society and, from 1965 to 1966, served as president of the American Society of Biological Chemists. In 1995, he published a book The Golden Helix: Inside Biotech Ventures. Kornberg has been married to Sylvy Ruth Levy Kornberg since 1943. His wife, who is also a biochemist, has collaborated on much of his work. They have three sons.

Further Reading

Wasson, Tyler, editor, Nobel Prize Winners, H. W. Wilson, 1987, pp. 797-802.

 
Columbia Encyclopedia: Arthur Kornberg
Top
Kornberg, Arthur, 1918-2007, American biochemist, b. Brooklyn, grad. College of the City of New York (B.S., 1937) and Univ. of Rochester (M.D., 1941). In 1942 he joined the U.S. Public Health Service and became (1951) medical director. He was a staff member (1942-52) of the National Institutes of Health, Bethesda, Md. He taught at Washington Univ., St. Louis, from 1953 and was chairman (1959-69) of the department of biochemistry at Stanford, where he remained until his death. Kornberg shared the 1959 Nobel Prize in Physiology or Medicine with Severo Ochoa for their work in the discovery of the mechanisms in the biological synthesis of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). Kornberg's discovery of polymerase, an enzyme used to synthesize nucleic acid, contributed to development of genetic engineering.
Wikipedia: Arthur Kornberg
Top
Arthur Kornberg

Arthur Kornberg
Born March 3, 1918(1918-03-03)
New York City, United States
Died October 26, 2007 (aged 89)
Stanford, United States
Institutions National Institutes of Health
Washington University
Stanford University
Alma mater University of Rochester, New York University
Notable awards Nobel Prize in Physiology or Medicine 1959

Arthur Kornberg (March 3, 1918 – October 26, 2007) was an American biochemist who won the Nobel Prize in Physiology or Medicine 1959 for his discovery of "the mechanisms in the biological synthesis of deoxyribonucleic acid (DNA)" together with Dr. Severo Ochoa of New York University. He was also awarded the Paul-Lewis Laboratories Award in Enzyme Chemistry from the American Chemical Society in 1951, L.H.D. degree from Yeshiva University in 1962, as well as National Medal of Science in 1979.

His primary research interests were in biochemistry, especially enzyme chemistry, the synthesis of deoxyribonucleic acid (DNA) and studying the nucleic acids which control heredity in animals, plants, bacteria and viruses.

Contents

Early life

Born in New York City, Arthur Kornberg was the son of Joseph and Lena Kornberg who emigrated to New York from Austrian Galicia (now part of Poland) in 1900 before they were married. His paternal grandfather had changed the family name from Queller (also spelled Kweller) to avoid the draft by taking on the identity of someone who had already completed military service. Joseph Kornberg married Lena Katz in 1904. He worked as a sewing machine operator in the sweat shops of the Lower East side of New York for almost 30 years, and when his health failed, opened a small hardware store in Brooklyn, where Arthur assisted customers at the age of nine. Joseph spoke at least six languages although he had no formal education.

Arthur Kornberg was educated first at Abraham Lincoln High School[1] and then at City College in New York City. He received at B. Sc. in 1937, followed by an M.D. at the University of Rochester in 1941. Kornberg had a mildly elevated level of bilirubin in his blood— jaundice due to a hereditary genetic condition known as Gilbert's syndrome—and while at medical school he took a survey of fellow students to discover how common the condition was. The results were published in Kornberg's first research paper in 1942.[2]

His internship was at Strong Memorial Hospital in Rochester, New York, between 1941-1942. After completing his medical training he joined the armed services as a Lieutenant in the United States Coast Guard, serving as a ship's doctor in 1942. Rolla Dyer, the Director of National Institutes of Health, had noticed his paper and invited him to join the research team at the Nutrition Laboratory of the NIH. From 1942 to 1945, Kornberg's work was the feeding of specialized diets to rats to discover new vitamins.

Scientific research

The feeding of rats was boring work, and Kornberg became fascinated by enzymes. He transferred to Dr Severo Ochoa's laboratory at New York University in 1946, and took summer courses at Columbia University to fill out the gaps in his knowledge of organic and physical chemistry while learning the techniques of enzyme purification at work. He became Chief of the Enzyme and Metabolism Section at NIH from 1947-1953, working on understanding of ATP production from NAD and NADP. This led to his work on how DNA is built up from simpler molecules.

In 1953 he became Professor and Head of the Department of Microbiology, Washington University, until 1959. Here he continued experimenting with the enzymes which created DNA. In 1956 he isolated the first DNA polymerizing enzyme, now known as DNA polymerase I [3]. This won him the Nobel prize in 1959.

In 1960 he received a LL.D. again from City College, followed by a D.Sc. at the University of Rochester in 1962. He became Professor and Executive Head of the Department of Biochemistry, Stanford University, Stanford in 1959.

Kornberg's mother died of gas gangrene from a spore infection after a routine gall bladder operation in 1939. This started his lifelong fascination with spores, and he devoted some of his research efforts to understanding them while at Washington University. From 1962 to 1970, in the midst of his work on DNA synthesis, Kornberg devoted half his research effort to determining how DNA is stored in the spore, what replication mechanisms are included, and how the spore generates a new cell. This was an unfashionable but complex area of science, and although some progress was made, eventually Kornberg abandoned this research.

The Arthur Kornberg Medical Research Building at the University of Rochester Medical Center was named in his honor in 1999.

Until his death Kornberg, still maintained an active research laboratory at Stanford, and regularly published peer reviewed scientific papers. For several years the focus of his research was the metabolism of inorganic polyphosphate.

The "Kornberg school" of biochemistry refers to Arthur Kornberg's many graduate students and post-doctoral fellows, i.e., his intellectual children, and the trainees of his trainees, i.e., his intellectual grandchildren. Kornberg's intellectual children include I. Robert Lehman, Randy Schekman, William T. Wickner and Ken-ichi Arai.

Family life

On November 21, 1943, Kornberg married Sylvy Ruth Levy, also a biochemist of note. She worked closely with Kornberg and contributed significantly to the discovery of DNA polymerase. The day after he was awarded the Nobel prize, she was quoted in a newspaper as saying "I was robbed".

Arthur and Sylvy Kornberg had three sons: Roger David Kornberg (1947) , Thomas B. Kornberg (1948), and Kenneth Andrew Kornberg (1950). Roger is Professor of Structural Biology at Stanford University, and the 2006 laureate of the Nobel Prize in Chemistry. Thomas discovered DNA polymerase II and III in 1970 and is now a professor at the University of California, San Francisco. Kenneth is an architect specializing in the design of biomedical and biotechnology laboratories and buildings.

Arthur Kornberg was married three times. His first two wives predeceased him. Sylvy Kornberg died in 1986. Arthur Kornberg remarried in 1988 but his second wife, the former Charlene Walsh Levering, died in 1995. In December 1998 Arthur Kornberg married Carolyn Dixon. She survived him.

When he was in his eighties Arthur Kornberg continued to conduct research full time at Department of Biochemistry at Stanford. He died on October 26, 2007 at Stanford Hospital from respiratory failure.

References

  1. ^ Hargittai, István. "The road to Stockholm: Nobel Prizes, science, and scientists", p. 121. Oxford University Press, 2002. ISBN 019850912X. Accessed September 20, 2009. "Arthur Kornberg (M59), Jerome Karle (C85), and Paul Berg (C80) all went to the Abraham Lincoln High School in Brooklyn."
  2. ^ Shmaefsky, Brian (2006). "5". Biotechnology 101. Greenwood Publishing Group. pp. 175. ISBN 9780313335280. http://books.google.com/books?id=E4KhutqTYNAC&pg=PA175&lpg=PA175&dq=%22Arthur+Kornberg%22+gilbert&source=bl&ots=dvtaF9IrIw&sig=RsAmSvW4x4gx0qxp9ygl_7gB-_E&hl=en&ei=HByASp-IFtW2jAf5hOTwAQ&sa=X&oi=book_result&ct=result&resnum=1#v=onepage&q=%22Arthur%20Kornberg%22%20gilbert&f=false. 
  3. ^ Nicole Kresge, Robert D. Simoni, Robert L. Hill (2005). Arthur Kornberg's Discovery of DNA Polymerase I. J. Biol. Chem. 280, 46. free fulltext

Books

  • For the Love of Enzymes: The Odyssey of a Biochemist. Harvard University Press, Cambridge, MA, 1989, ISBN 0-674-30776-3
  • The Golden Helix: Inside Biotech Ventures. University Science Books, 2002, ISBN 1-891389-19-X

External links


 
 

 

Copyrights:

Britannica Concise Encyclopedia. Britannica Concise Encyclopedia. © 2006 Encyclopædia Britannica, Inc. All rights reserved.  Read more
Scientist. A Dictionary of Scientists. Copyright © Market House Books Ltd 1993, 1999, 2003. All rights reserved.  Read more
Biography. © 2006 through a partnership of Answers Corporation. All rights reserved.  Read more
Columbia Encyclopedia. The Columbia Electronic Encyclopedia, Sixth Edition Copyright © 2003, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/ Read more
Wikipedia. This article is licensed under the Creative Commons Attribution/Share-Alike License. It uses material from the Wikipedia article "Arthur Kornberg" Read more