digplanet beta 1: Athena
Share digplanet:


Applied sciences






















Joshua Lederberg
Joshua Lederberg-nih.jpg
Joshua Lederberg in New Delhi, India
Born (1925-05-23)May 23, 1925
Montclair, New Jersey
Died February 2, 2008(2008-02-02) (aged 82)
NewYork-Presbyterian Hospital
Nationality American
Fields Microbiologist
Alma mater Stuyvesant High School
Columbia University
Yale University
Known for Neurospora crassa
Bacterial conjugation
Notable awards Nobel Prize in Physiology or Medicine (1958)
National Medal of Science (1989)
Presidential Medal of Freedom (2006)
Spouse Esther Miriam Zimmer (1946-1966; divorced)
Marguerite Stein Kirsch (1968-2008; 1 child, 1 stepchild)

Joshua Lederberg, ForMemRS[1] (May 23, 1925 – February 2, 2008)[2] was an American molecular biologist known for his work in microbial genetics, artificial intelligence, and the United States space program. He was just 33 years old when he won the 1958 Nobel Prize in Physiology or Medicine for discovering that bacteria can mate and exchange genes.[3] He shared the prize with Edward L. Tatum and George Beadle who won for their work with genetics.

In addition to his contributions to biology, Lederberg did extensive research in artificial intelligence. This included work in the NASA experimental programs seeking life on Mars and the chemistry expert system Dendral.

Early life and education[edit]

Lederberg was born in Montclair, New Jersey, to a Jewish family, son of Esther Goldenbaum Schulman Lederberg and Rabbi Zvi Hirsch Lederberg, in 1925, and moved to Washington Heights, Manhattan as an infant.[4] He had two younger brothers. Lederberg graduated from Stuyvesant High School in New York City at the age of 15 in 1941.[5] After graduation, he was allowed lab space as part of the American Institute Science Laboratory, a forerunner of the Westinghouse Science Talent Search. He enrolled in Columbia University in 1941, majoring in zoology. Under the mentorship of Francis J. Ryan, he conducted biochemical and genetic studies on the bread mold Neurospora crassa. Intending to receive his MD and fulfill his military service obligations, Lederberg worked as a hospital corpsman during 1943 in the clinical pathology laboratory at St. Albans Naval Hospital, where he examined sailors' blood and stool samples for malaria. He went on to receive his undergraduate degree in 1944.

Bacterial genetics[edit]

Joshua Lederberg began medical studies at Columbia's College of Physicians and Surgeons while continuing to perform experiments. Inspired by Oswald Avery's discovery of the importance of DNA, Lederberg began to investigate his hypothesis that, contrary to prevailing opinion, bacteria did not simply pass down exact copies of genetic information, making all cells in a lineage essentially clones. After making little progress at Columbia, Lederberg wrote to Edward Tatum, his post-doctoral mentor, proposing a collaboration. In 1946 and 1947, Lederberg took a leave of absence to study under the mentorship of Tatum at Yale University. Lederberg and Tatum showed that the bacterium Escherichia coli entered a sexual phase during which it could share genetic information through bacterial conjugation.[6][7] With this discovery and some mapping of the E. coli chromosome, Lederberg was able to receive his Ph. D. from Yale University in 1947. Joshua married Esther Miriam Zimmer (herself a student of Ed Tatum) on December 13, 1946.

Instead of returning to Columbia to finish his medical degree, Lederberg chose to accept an offer of an assistant professorship in genetics at the University of Wisconsin–Madison. His wife Esther Lederberg went with him to Wisconsin. She received her doctorate there in 1950.

Joshua Lederberg and Norton Zinder showed in 1951 that genetic material could be transferred from one strain of the bacterium Salmonella typhimurium to another using viral material as an intermediary step.[8] This process is called transduction. In 1956, M. Laurance Morse, Esther Lederberg and Joshua Lederberg also discovered specialized transduction.[9][10] The research in specialized transduction focused upon lambda phage infection of E. coli. Transduction and specialized transduction explained how bacteria of different species could gain resistance to the same antibiotic very quickly.

During her time in Joshua Lederberg's laboratory, Esther Lederberg also discovered fertility factor F, later publishing with Joshua Lederberg and Luigi Luca Cavalli-Sforza. In 1956, the Society of Illinois Bacteriologists simultaneously awarded Joshua Lederberg and Esther Lederberg the Pasteur Medal, for "their outstanding contributions to the fields of microbiology and genetics".

In 1957, Joshua Lederberg founded the Department of Medical Genetics at the University of Wisconsin–Madison.

Post Nobel Prize research[edit]

Joshua Lederberg (right) receiving The National Medal of Science from George H. W. Bush.

In 1958, Joshua Lederberg received the Nobel Prize and moved to Stanford University where he was the founder and chairman of the Department of Genetics. He collaborated with Frank Macfarlane Burnet to study viral antibodies. With the launching of Sputnik in 1957, Lederberg became concerned about the biological impact of space exploration. In a letter to the National Academies of Sciences, he outlined his concerns that extraterrestrial microbes might gain entry to Earth onboard spacecraft, causing catastrophic diseases. He also argued that, conversely, microbial contamination of manmade satellites and probes may obscure the search for extraterrestrial life. He advised quarantine for returning astronauts and equipment and sterilization of equipment prior to launch. Teaming up with Carl Sagan, his public advocacy for what he termed exobiology helped expand the role of biology in NASA.

In the 1960s, he collaborated with Edward Feigenbaum in Stanford's computer science department to develop DENDRAL.

In 1978, he became the president of Rockefeller University, until he stepped down in 1990 and became professor-emeritus of molecular genetics and informatics at Rockefeller University, considering his extensive research and publications in these disciplines.

Throughout his career, Lederberg was active as a scientific advisor to the U.S. government. Starting in 1950, he was a member of various panels of the Presidential Science Advisory Committee. In 1979, he became a member of the U.S. Defense Science Board and the chairman of President Jimmy Carter's President's Cancer Panel. In 1989, he received National Medal of Science for his contributions to the scientific world. In 1994, he headed the Department of Defense's Task Force on Persian Gulf War Health Effects, which investigated Gulf War Syndrome.

Lederberg received the Benjamin Franklin Medal for Distinguished Achievement in the Sciences of the American Philosophical Society in 2002.[11]

In 2006, Lederberg was awarded the Presidential Medal of Freedom. In his honor 87 km diameter large impact crater in Xanthe Terra on the surface of Mars was named in the year 2012.[12]


Lederberg married fellow scientist Esther Miriam Zimmer in 1946; they divorced in 1966. He married psychiatrist Marguerite Stein Kirsch in 1968. He was survived by Marguerite, their daughter, Anne Lederberg, and his stepson, David Kirsch.

See also[edit]


  1. ^ Bodmer, W.; Ganesan, A. (2011). "Joshua Lederberg. 23 May 1925 -- 2 February 2008". Biographical Memoirs of Fellows of the Royal Society. doi:10.1098/rsbm.2010.0024.  edit
  2. ^ Joshua Lederberg, Rockefeller University's fifth president, dies at 82
  3. ^ Warwick, K. "The Joshua Lederberg Papers: Profiles in Science, National Library of Medicine", Biography,Volume 24, Number 4, Fall 2001, pp. 978-982
  4. ^ Broad, William J. "Joshua Lederberg, 82, a Nobel Winner, Dies", The New York Times, February 5, 2008. Accessed April 22, 2008. "Dr. Lederberg was born May 23, 1941, in Montclair, N.J., to Zvi Hirsch Lederberg, a rabbi, and the former Esther Goldenbaum, who had emigrated from what is now Israel two years earlier. His family moved to the Washington Heights section of Manhattan when he was 6 months old."
  5. ^ "Joshua Lederberg - The Nobel Prize in Physiology or Medicine 1958 - Biography". 1958. Retrieved 2007-10-31. 
  6. ^ Lederberg, J.; Tatum, E. L. (1946). "Gene Recombination in Escherichia Coli". Nature 158 (4016): 558. doi:10.1038/158558a0.  edit
  7. ^ Zinder, N. D.; Lederberg, J. (1952). "Genetic Exchange in Salmonella". Journal of bacteriology 64 (5): 679–699. PMC 169409. PMID 12999698.  edit
  8. ^ http://www.ncbi.nlm.nih.gov/books/bv.fcgi?rid=iga.section.1363
  9. ^ Morse, M. L.; Lederberg, E. M.; Lederberg, J. (1956). "Transduction in Escherichia Coli K-12". Genetics 41 (1): 142–156. PMC 1209761. PMID 17247607.  edit
  10. ^ Morse, M. L.; Lederberg, E. M.; Lederberg, J. (1956). "Transductional Heterogenotes in Escherichia Coli". Genetics 41 (5): 758–779. PMC 1209815. PMID 17247661.  edit
  11. ^ "Benjamin Franklin Medal for Distinguished Achievement in the Sciences Recipients". American Philosophical Society. Retrieved November 26, 2011. 
  12. ^ http://planetarynames.wr.usgs.gov/Feature/15016?__fsk=-1030460376

External links[edit]

Original courtesy of Wikipedia: http://en.wikipedia.org/wiki/Joshua_Lederberg — Please support Wikipedia.
A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia.
90 videos foundNext > 

1999 Morris F. Collen Award: Joshua Lederberg

Prof. Joshua Lederberg at CU, with an introduction by Uwe Morawetz

Medicine Nobel Laureate Prof. Joshua Lederberg's keynote speech "Health as an imperative to peace and peace as an imperative to health" on Wednesday, Novembe...


http://miklosbajay.blogspot.com/ A plasmid is a DNA molecule that is separate from, and can replicate independently of, the chromosomal DNA. They are double ...

Dean Hartwell 9/11 Drone Facebook Message NYPD Drone photo Chat

I send this to +911InvestigationVids Can you look around and find out why these characters were sniffing around WTC? This is cover story for advanced weaponr...

Conjugation between hfr and f bacteria

For more information, log on to- http://shomusbiology.weebly.com/ Download the study materials here- http://shomusbiology.weebly.com/bio-materials.html Bacte...

Bacterial conjugation

Bacterial conjugation is the transfer of genetic material between bacteria through direct cell-to-cell contact. Discovered in 1946 by Joshua Lederberg and Ed...

Sarah Schlesinger on Philosophy and Religion

Former President of the Rockefeller University Joshua Lederberg was a person of both science and faith, and Schlesinger talks about why she respected him for...

Joshua's Award

Josh getting his award.

UW-Madison's Nobel Prize Winners

This video presents four Nobel winners: Joshua Lederberg (1958, Medicine), Har Gobind Khorana (1968, Medicine), Howard Temin (1975, Medicine), and John Van V...

Edward Feigenbaum receives 2013 Computer Pioneer Award

The IEEE Computer Society presented its 2013 Computer Pioneer Award to Edward Feigenbaum for pioneering work in Artificial Intelligence, including developmen...

90 videos foundNext > 

3 news items

Stockton Record
Sat, 12 Apr 2014 00:06:41 -0700

Alice began working at Stanford University, under Nobel Laureate Joshua Lederberg. After starting a family and moving to Stockton, Alice later found herself working for the Commercial Appraisal Department of American Savings for several years until she ...

Singularity Hub

Singularity Hub
Tue, 01 Apr 2014 09:04:48 -0700

Whether or not the single biggest threat to humankind's continued vitality on the planet is the virus, as Nobel Laureate Joshua Lederberg has said, there's no question that viruses impose a hefty toll on human health worldwide. Though bacteria have ...

La Stampa

La Stampa
Mon, 17 Mar 2014 16:36:32 -0700

Lo attirava la ricerca, e la coltivò in precoci esperienze all'estero con grandi scienziati come Ronald Fisher, fondatore a Cambridge della statistica genetica, e il microbiologo Joshua Lederberg, che il ricevette il Nobel per la medicina nel 1958. Fu ...

Oops, we seem to be having trouble contacting Twitter

Talk About Joshua Lederberg

You can talk about Joshua Lederberg with people all over the world in our discussions.

Support Wikipedia

A portion of the proceeds from advertising on Digplanet goes to supporting Wikipedia. Please add your support for Wikipedia!