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Matthew Meselson

Matthew Stanley Meselson (born May 24, 1930) is a geneticist and molecular biologist currently at Harvard University, known for his demonstration, with Franklin Stahl, of semi-conservative DNA replication. After completing his Ph.D. under Linus Pauling at the California Institute of Technology, Meselson became a Professor at Harvard University in 1960, where he has remained, today, as Thomas Dudley Cabot Professor of the Natural Sciences.

Matthew Meselson
Born
Matthew Stanley Meselson

(1930-05-24) May 24, 1930 (age 93)
Denver, Colorado, U.S.
Alma materUniversity of Chicago (Ph.B., 1951)
California Institute of Technology (Ph.D., 1957)
Known for
AwardsGuggenheim Fellowship, MacArthur Fellows Program Genius Award, Genetics Society of America - Thomas Hunt Morgan Medal for lifetime contributions, Lasker Award for Special Achievement in Medical Science
Scientific career
Fields
Institutions
ThesisI. Equilibrium sedimentation of macromolecules in density gradients with application to the study of deoxyribonucleic acid. II. The crystal structure of N,N-dimethyl malonamide (1957)
Doctoral advisorLinus Pauling
Notable studentsMark Ptashne, Susan Lindquist, Richard I. Morimoto, Sidney Altman, Nancy Kleckner, Steven Henikoff

In the famous Meselson–Stahl experiment of 1958 he and Frank Stahl demonstrated through nitrogen isotope labeling that DNA is replicated semi-conservatively.[1] In addition, Meselson, François Jacob, and Sydney Brenner discovered the existence of messenger RNA in 1961. Meselson has investigated DNA repair in cells and how cells recognize and destroy foreign DNA, and, with Werner Arber, was responsible for the discovery of restriction enzymes.

Since 1963 he has been interested in chemical and biological defense and arms control, has served as a consultant on this subject to various government agencies. Meselson worked with Henry Kissinger under the Nixon administration to convince President Richard Nixon to renounce biological weapons, suspend chemical weapons production, and support an international treaty prohibiting the acquisition of biological agents for hostile purposes, which in 1972 became known as the Biological Weapons Convention.

Meselson has received the Award in Molecular Biology from the National Academy of Sciences, the Public Service Award of the Federation of American Scientists, the Presidential Award of the New York Academy of Sciences, the 1995 Thomas Hunt Morgan Medal of the Genetics Society of America, as well as the Lasker Award for Special Achievement in Medical Science. His laboratory at Harvard currently investigates the biological and evolutionary nature of sexual reproduction, genetic recombination, and aging. Many of his past students are notable biologists, including Nobel Laureate Sidney Altman, as well as Mark Ptashne, Susan Lindquist, Stephen F. Heinemann, and Richard I. Morimoto.

Early life and education edit

Meselson was born in Denver, Colorado, on May 24, 1930, and attended elementary and high school in Los Angeles, California. While a young child he was interested in chemistry and physics, and conducted many experiments in the natural sciences at home. During World War II, Meselson attended summer school during summer vacations and received enough high school credits to graduate a year and a half ahead of time. When he attempted to acquire his diploma from the registrar at his high school, however, he was informed that in order to receive his high school diploma, he needed three full years of physical education, which he lacked. After searching for options, he enrolled at the University of Chicago at the age of 16 in 1946 intending to study chemistry, since it did not require a high school diploma to attend.[2]

Higher education edit

At the University of Chicago, Meselson studied liberal arts including history and classics as an undergraduate from 1946 to 1949 after realizing upon arriving that the university had abolished bachelor's degrees in specialized field such as chemistry and physics. After completing his studies, Meselson spent half a year traveling in Europe. where he spend most of his time reading and making friends. The devastation of the war was still evident in Europe in 1949, as were the beginning tensions of the Cold War. The following year, Meselson returned to Caltech to begin freshman studies again, but disliked the pedagogical approach in most of the courses he took. He enrolled, however, in Linus Pauling's freshman chemistry course, which he loved, and worked on a project for Pauling the same year on hemoglobin structure.[3]

Meselson subsequently returned to the University of Chicago for a year to enroll in courses in chemistry, physics, and math, though he did not receive another degree. The following year, he was accepted into a graduate physics program at the University of California at Berkeley where he remained for a year. In the summer of 1953, Meselson was at a swimming pool party at the Pauling home in Sierra Madre (he was friends with Pauling's son Peter and with his daughter Linda), and Pauling asked him what he intended to do the following year. Upon hearing Meselson respond that he intended to return to the University of Chicago, Pauling immediately asked him to come to Caltech to begin graduate studies with him, to which Meselson agreed. As a graduate student of Linus Pauling in chemistry at the California Institute of Technology (1953-1957), Meselson's doctoral dissertation was on equilibrium density gradient centrifugation and on x-ray crystallography. Besides Pauling, Meselson's dissertation committee also included Jerome Vinograd, Richard Feynman, and Harden M. McConnell.[4] Meselson then served as Assistant Professor of Physical Chemistry and then Senior Research Fellow at Caltech until he joined the Harvard faculty in 1960.

Research edit

In 1957, Meselson and Franklin Stahl (as part of the phage group) showed that DNA replicates semi-conservatively.[5] In order to test hypotheses for how DNA replicates, Meselson and Stahl, together with Jerome Vinograd, invented a method that separates macromolecules according to their buoyant density.[6] The method, equilibrium density gradient centrifugation, was sufficiently sensitive that Meselson and Stahl were able to separate DNA containing the heavy isotope of nitrogen, 15N, from DNA made of the lighter isotope, 14N. In their classic experiment, described and analyzed in a book by science historian Frederic L. Holmes,[7] they grew the bacterium Escherichia coli for many generations in medium containing 15N as the only nitrogen source and then switched the bacteria to growth medium containing 14N instead. They extracted DNA from bacteria prior to switching and, at intervals, for several generations thereafter. After one generation of growth, all the DNA was seen to have a density halfway between that of 15N DNA and 14N DNA. In successive generations, the fraction of DNA that was "half-heavy" fell by a factor of ½, as the total amount of DNA increased two-fold. When the half-heavy DNA was made single stranded by heating, it separated into two density species, one heavy (containing only 15N) and one light (containing only 14N). The experiment implied that, upon replication, the two complementary strands of the bacterial DNA separate, and that each of the single strands directs the synthesis of a new, complementary strand, a result that verified the suggestion for DNA replication put forward five years earlier by James Watson and Francis Crick[8] and lent important early support for the Watson-Crick model of the DNA molecule.

In collaboration with Jean Weigle, Meselson then applied the density gradient method to studies of genetic recombination in the bacteriophage Lambda.[9] The question was whether such recombination involved breakage of the recombining DNA molecules or cooperative synthesis of new molecules. The question could be answered by examining phage particles derived from co-infection of bacteria with genetically marked Lambda phages that were labeled with heavy isotopes (13C and 15N). The density-gradient method allowed individual progeny phages to be characterized for their inheritance of parental DNA and of parental genetic makers. Meselson's initial demonstration of breakage-associated, replication-independent recombination was later found to reflect the activity of a special system that can recombine Lambda DNA at only one spot, normally used by the phage to insert itself into the chromosome of a host cell. Subsequently, variations of the experiment by Franklin Stahl revealed reciprocal dependencies between DNA replication and most genetic recombination.[10] With Charles Radding, Meselson developed a model for recombination between DNA duplexes that guided research in the field for the decade from 1973 to 1983.[11]

In 1961, Sydney Brenner, François Jacob and Meselson used the density-gradient method to demonstrate the existence of messenger RNA.[12][13] In subsequent work, Meselson and his students demonstrated the enzymatic basis of host-directed restriction,[14] a process by which cells recognize and destroy foreign DNA and then predicted and demonstrated methyl-directed mismatch repair,[15][16][17] a process that enables cells to correct mistakes in replicating DNA. Meselson's current research is aimed at understanding the advantage of sexual reproduction in evolution. Meselson and his colleagues have recently demonstrated that Bdelloid rotifers do, in fact, engage in sexual reproduction employing meiosis of an atypical sort.[18]

Meselson effect edit

When two alleles, or copies of a gene, within an asexual diploid individual evolve independently of each other, they become increasingly different over time. This phenomenon of allelic divergence was first described by William Birky,[19] but is more commonly known as the Meselson effect. In sexual organisms, the processes of recombination and independent assortment allow both of the alleles within an individual to descend from a recent single ancestral allele. Without recombination or independent assortment, alleles cannot descend from a recent ancestral allele. Instead the alleles share a last common allelic ancestor at or just preceding the loss of meiotic recombination.[20] A striking example of this effect was described in bdelloid rotifers, in which the two alleles of the lea gene have diverged into two different genes which work together to preserve the organism during periods of dehydration.[21] The Meselson effect should cause entire copies of an organism's genome to diverge from each other, effectively reducing all anciently asexual organisms to a haploid state, in a process similar to the diploidization following whole genome duplication.

However, gene conversion, a form of recombination common in asexual organisms, may prevent the Meselson effect from occurring in young asexual organisms[22] and may limit the effect in Bdelloid rotifers.[23] Moreover, a number of putative examples of the Meselson effect remain controversial because other biological process, such as hybridation, can mimic the Meselson effect.[24][25][26][27][28]

Chemical and biological weapons defense and disarmament edit

In 1963 Meselson served as a resident consultant in the US Arms Control and Disarmament Agency, where he became interested in chemical and biological weapons programs and policies. Since then he has been involved in chemical and biological weapons defense and disarmament matters as a consultant to various US government agencies and through the Harvard Sussex Program, an academic research organization based at Harvard and at the University of Sussex in the UK of which he and Julian Perry Robinson in the UK are co-directors.

Concluding that biological weapons served no substantial military purpose for the US and that their proliferation would pose a serious threat and that, in years ahead, the exploitation of advanced biology for hostile purposes would be inimical to society generally, he worked to persuade members of the Executive Branch, the Congress and the public that the US had no need for such weapons and that there would be benefits in renouncing them and working for worldwide prohibition. After President Richard Nixon in 1969 canceled the US BW offensive program and endorsed a UK proposal for an international ban, Meselson was among those who successfully advocated international agreements to ban biological and then chemical weapons, leading to the Biological Weapons Convention of 1972 and the Chemical Weapons Convention of 1993.

Meselson and his colleagues have undertaken three on-site investigations with implications for chemical and biological weapons arms control. During August and September 1970, on behalf of the American Association for the Advancement of Science, Meselson led a team in the Republic of Vietnam in a pilot study of the ecological and health effects of the military use of herbicides.[29][30][31] Upon returning to Harvard, he and Robert Baughman developed an advanced mass-spectrometric method for analysis of the toxic herbicide contaminant dioxin and applied it to environmental and biomedical samples from the Vietnam and the US. In December 1970, President Richard Nixon ordered a "rapid but orderly" phase-out of herbicide operations in Vietnam.[32]

During the 1980s, Meselson investigated allegations that "yellow rain" was a Soviet toxin weapon being used against Hmong tribespeople in Laos. Citing the physical appearance and high pollen content of samples of the alleged agent; the resemblance of the alleged attacks to showers of feces from swarms of honeybees that he and entomologist Thomas Seeley documented during a 1983 field study in Thailand; the inability of US and UK government laboratories to corroborate initial reports of the presence of trichothecene mycotoxins in samples of the alleged agent and in biomedical samples from alleged victims; the lack of any supporting evidence from extensive interviews with Vietnamese military defectors and prisoners; and other considerations, Meselson and his colleagues argued that the allegations were mistaken.[33][34][35][36]

In April 1980 Meselson served as a resident consultant to the CIA investigating a major outbreak of anthrax among people in the Soviet city of Sverdlovsk. He concluded that on the basis of available evidence the official Soviet explanation that the outbreak was caused by consumption of meat from infected cattle was plausible but that there should be an independent on-site investigation. After the collapse of the Soviet Union, he was allowed to bring a team to Sverdlovsk in 1992 and again in 1993. Their reports conclusively showed that the official Soviet explanation was wrong and that the outbreak was caused by the release of an anthrax aerosol at a military biological facility in the city.[37][38]

Meselson is a member of the U.S. National Academy of Sciences, the American Academy of Arts and Sciences, the American Philosophical Society, the Académie des Sciences (Paris), the Royal Society (London) and the Russian Academy of Sciences and has received numerous awards and honors in the field of science and in public affairs. He has served on the Council of the National Academy of Sciences, the Council of the Smithsonian Institution, the Arms Control and Non-Proliferation Advisory Board to the US Secretary of State and the Committee on International Security and Arms Control of the US National Academy of Sciences. He is past President of the Federation of American Scientists, and presently is co-director of the Harvard Sussex Program on Chemical and Biological Weapons and a member of the board of directors of the Belfer Center for Science and International Affairs at the John F. Kennedy School of Government at Harvard University.

Selected awards edit

Honorary doctoral degrees edit

  • 1966 Oakland University
  • 1971 Columbia University
  • 1975 University of Chicago
  • 1987 Yale University
  • 1988 Princeton University
  • 2003 Northwestern University
  • 2013 McGill University
  • 2017 Rockefeller University

Personal life edit

He married three times, first to Katherine Kaynis, then to Sarah Page, with whom he had two daughters, Amy and Zoe. His third marriage was to Jeanne Guillemin, with whom he shares two stepsons.[40]

References edit

  1. ^ Meselson, Stahl, and the Replication of DNA. A History of "The Most Beautiful Experiment in Biology", Frederic Lawrence Holmes, Yale University Press (2001). ISBN 0300085400
  2. ^ Meselson, M. (2003). "Interview with Matthew Meselson" (PDF). BioEssays. 25 (12): 1236–1246. doi:10.1002/bies.10374. PMID 14635259.
  3. ^ Meselson, M. (2003). "Interview with Matthew Meselson" (PDF). BioEssays. 25 (12): 1236–1246. doi:10.1002/bies.10374. PMID 14635259.
  4. ^ Holmes, Frederic Lawrence (2001). Meselson, Stahl, and the Replication of DNA: A History of "The Most Beautiful Experiment in Biology". New Haven: Yale University Press. p. 265. ISBN 9780300129663. Retrieved June 28, 2023.
  5. ^ Meselson, M.; Stahl, F. (1958). "The Replication of DNA in E. coli". Proceedings of the National Academy of Sciences USA. 44 (7): 671–682. Bibcode:1958PNAS...44..671M. doi:10.1073/pnas.44.7.671. PMC 528642. PMID 16590258.
  6. ^ Meselson, M.; Stahl, F.; Vinograd, J. (1957). "Equilibrium Sedimentation of Macromolecules in Density Gradients". Proceedings of the National Academy of Sciences USA. 43 (7): 581–588. Bibcode:1957PNAS...43..581M. doi:10.1073/pnas.43.7.581. PMC 528502. PMID 16590059.
  7. ^ Meselson, Stahl, and the Replication of DNA. A History of "The Most Beautiful Experiment in Biology", Frederic Lawrence Holmes, Yale University Press (2001). ISBN 0300085400
  8. ^ Watson, J. D.; Crick, F. H. C. (1953). "Genetical Implications of the Structure of Deoxyribonucleic Acid". Nature. 171 (4361): 964–967. doi:10.1038/171964a0. PMID 13063483.
  9. ^ Meselson, M.; Weigle, J. (1961). "Chromosome Breakage Accompanying Genetic Recombination in Bacteriophage". Proceedings of the National Academy of Sciences USA. 47 (6): 857–868. Bibcode:1961PNAS...47..857M. doi:10.1073/pnas.47.6.857. PMC 221352. PMID 13769766.
  10. ^ Stahl, F. W. (1998) Recombination in phage λ: one geneticist's historical perspective" Gene 223: 95-102 10.1016/S0378-1119(98)00246-7
  11. ^ Meselson, M.; Radding, C. (1975). "A General Model for Genetic Recombination". Proceedings of the National Academy of Sciences USA. 72 (1): 358–361. Bibcode:1975PNAS...72..358M. doi:10.1073/pnas.72.1.358. PMC 432304. PMID 1054510.
  12. ^ Brenner, S.; Jacob, F.; Meselson, M. (1961). "An Unstable Intermediate Carrying Information from Genes to Ribosomes for Protein Synthesis". Nature. 190 (4776): 576–581. Bibcode:1961Natur.190..576B. doi:10.1038/190576a0. PMID 20446365. S2CID 4200865.
  13. ^ Meselson, M (2014). "François and X." Research in Microbiology. 165 (5): 313–315. doi:10.1016/j.resmic.2014.05.004. PMID 24853970.
  14. ^ Meselson, M.; Yuan, R. (1968). "DNA Restriction Enzyme from E. coli". Nature. 217 (5134): 1110–1114. Bibcode:1968Natur.217.1110M. doi:10.1038/2171110a0. PMID 4868368. S2CID 4172829.
  15. ^ Wagner, R. Jr.; Meselson, M. (1976). "Repair Tracts in Mismatch DNA Heteroduplexes". Proceedings of the National Academy of Sciences USA. 73 (11): 4135–4139. Bibcode:1976PNAS...73.4135W. doi:10.1073/pnas.73.11.4135. PMC 431357. PMID 1069303.
  16. ^ Radman, M., R.E. Wagner, Jr., B.W. Glickman, and M. Meselson 1980. DNA Methylation, Mismatch Correction and Genetic Stability. in Progress in Environmental Mutagenesis ed. M. Alacevic. Amsterdam, Elsevier/ North Holland Biomedical Press, pp. 121-130 ISBN 044480241X
  17. ^ Pukkila, P.J.; Peterson, J.; Herman, G.; Modrich, P.; Meselson, M. (1983). "Effects of High Levels of DNA Adenine Methylation on Methyl-Directed Mismatch Repair in E. coli". Genetics. 104 (4): 571–582. doi:10.1093/genetics/104.4.571. PMC 1202127. PMID 6225697.
  18. ^ Signorovitch, Ana; Hur, Jae; Gladyshev, Eugene; Meselson, Matthew (June 1, 2015). "Allele Sharing and Evidence for Sexuality in a Mitochondrial Clade of Bdelloid Rotifers". Genetics. 200 (2): 581–590. doi:10.1534/genetics.115.176719. ISSN 0016-6731. PMC 4492381. PMID 25977472.
  19. ^ Birky, C.W. (1996). "Heterozygosity, Heteromorphy, and Phylogenetic Trees in Asexual Eukaryotes". Genetics. 144 (1): 427–437. doi:10.1093/genetics/144.1.427. PMC 1207515. PMID 8878706.
  20. ^ Butlin, R. (2002). "OPINION — EVOLUTION OF SEXThe costs and benefits of sex: New insights from old asexual lineages". Nature Reviews Genetics. 3 (4): 311–317. doi:10.1038/nrg749. PMID 11967555. S2CID 5771780.
  21. ^ Pouchkina-Stantcheva, N. N.; McGee, B. M.; Boschetti, C.; Tolleter, D.; Chakrabortee, S.; Popova, A. V.; Meersman, F.; Macherel, D.; Hincha, D. K.; Tunnacliffe, A. (2007). "Functional Divergence of Former Alleles in an Ancient Asexual Invertebrate". Science. 318 (5848): 268–271. Bibcode:2007Sci...318..268P. doi:10.1126/science.1144363. PMID 17932297. S2CID 30678095.
  22. ^ Tucker, AE; Ackerman, MA; Eads, BD; Xu, S; Lynch, M (2013). "Population-genomic insights into the evolutionary origin and fate of obligately asexual Daphnia pulex". PNAS. 110 (39): 15740–15745. Bibcode:2013PNAS..11015740T. doi:10.1073/pnas.1313388110. PMC 3785735. PMID 23959868.
  23. ^ Flot J-F, Hespeels B, Li X, Noel B, Arkhipova I, Danchin EGJ, Hejnol A, Henrissat B, Koszul R, Aury JM, Barbe V, Barthélémy RM, et al. (2013)
  24. ^ Schön I, Martens K, Dijk P (2009) Lost Sex: The Evolutionary Biology of Parthenogenesis. The Netherlands: Springer. 615 p. (chapter 13)
  25. ^ Schaefer, I.; Domes, K.; Heethoff, M.; Schneider, K.; SCHÖN, I.; Norton, R. A.; Scheu, S.; Maraun, M. (2006). "No evidence for the 'Meselson effect' in parthenogenetic oribatid mites (Oribatida, Acari)". Journal of Evolutionary Biology. 19 (1): 184–193. doi:10.1111/j.1420-9101.2005.00975.x. PMID 16405590. S2CID 36317445.
  26. ^ Mark Welch, David B.; Mark Welch, Jessica L.; Meselson, Matthew (2008). "Evidence for degenerate tetraploidy in bdelloid rotifers". PNAS. 105 (13): 5145–5149. Bibcode:2008PNAS..105.5145M. doi:10.1073/pnas.0800972105. PMC 2278229. PMID 18362354.
  27. ^ Hur, Jae H.; Van Doninck, Karine; Mandigo, Morgan L.; Meselson, Matthew (2009). "Degenerate Tetraploidy Was Established Before Bdelloid Rotifer Families Diverged" (PDF). Mol Biol Evol. 26 (2): 375–383. doi:10.1093/molbev/msn260. PMID 18996928.
  28. ^ Stoeckel, S; Masson, J-P (2014). "The Exact Distributions of FIS under Partial Asexuality in Small Finite Populations with Mutation". PLOS ONE. 9 (1): e85228. Bibcode:2014PLoSO...985228S. doi:10.1371/journal.pone.0085228. PMC 3897417. PMID 24465510.
  29. ^ Meselson, M.; Constable, J. (1971). "The Ecological Impact of Large Scale Defoliation in Vietnam". Sierra Club Bulletin. 56: 4–9.
  30. ^ Statement at hearing: Chemical and Biological Warfare, Committee on Foreign Relations, U.S. Senate, secret hearing held April 30, 1969, sanitized and printed June 23, 1969, 50 pp. SUDOC: Y4.F76/2:W23/2
  31. ^ Meselson, M. (2017) "From Charles and Francis Darwin to Richard Nixon: The Origin and Termination of Anti-plant Chemical Warfare in Vietnam" in Friedrich et al. eds. 100 Years of Chemical Warfare: Research, Deployment, Consequences, Springer International pp. 325-338. https://www.amazon.com/One-Hundred-Years-Chemical-Warfare/dp/3319516639/ref=sr_1_fkmr0_1?ie=UTF8&qid=1509033228&sr=8-1-fkmr0&keywords=100+years+of+chemical+warfare
  32. ^ Richard Lyons, New York Times, December 26, 1970 "Military to Curb Use of Herbicides" https://timesmachine.nytimes.com/timesmachine/1970/12/27/82609457.pdf
  33. ^ Nowicke, J.; Meselson, M. (1984). "Yellow Rain: A Palynological Analysis". Nature. 309 (5965): 205–206. Bibcode:1984Natur.309..205N. doi:10.1038/309205a0. PMID 6717598. S2CID 38336939.
  34. ^ Seeley, T.D.; Nowicke, J.W.; Meselson, M.; Guillemin, J.; Akratanakul, P. (1985). "Yellow Rain". Scientific American. 253 (3): 128–137. Bibcode:1985SciAm.253c.128S. doi:10.1038/scientificamerican0985-128.
  35. ^ Meselson, M. and J.P. Robinson 2008. The Yellow Rain Affair: Lessons from a Discredited Allegation. Chapter 4 in Terrorism, War or Disease? Unraveling the Use of Biological Weapons. eds. S. Clunan, P. Levoy, S. Martin. Stanford University Press pp 72-96 ISBN 9780804759762
  36. ^ Pribbenow, Merle L. (2006). "'Yellow Rain': Lessons from an Earlier WMD Controversy". International Journal of Intelligence and CounterIntelligence. 19 (4): 737–745. doi:10.1080/08850600600656525. S2CID 153913163.
  37. ^ Meselson, M.; Guillemin, J.; Hugh-Jones, M.; Langmuir, A.; Popova, I.; Shelokov, A.; Yampolskaya, O. (1994). "The Sverdlovsk Anthrax Outbreak of 1979". Science. 266 (5188): 1202–1208. Bibcode:1994Sci...266.1202M. doi:10.1126/science.7973702. PMID 7973702.
  38. ^ Guillemin, J. 2001. Anthrax, investigation of a deadly outbreak. University of California Press. ISBN 9780520229174
  39. ^ Piper, Kelsey (April 9, 2019), "The man who stopped America's biological weapons program", Vox, retrieved March 2, 2022
  40. ^ "Obituaries: Amy Meselson, 46, Immigrant Defender," The New York Times, August 8, 2018

External links edit

  • Diplomacy Light Podcast #3 BWC at Fifty: Matthew Meselson, John Walker, and Sergey Batsonov
  • Xapiens Podcast Ending Biological Warfare, COVID, Henry Kissinger, mRNA, Meselson-Stahl, Mathew Meselson
  • Matthew Meselson's bio at Harvard Kennedy School
  • Video of a talk by Meselson titled "Linus Pauling as an Educator"
  • iBio The Semi-Conservative Replication of DNA
  • McGill Honorary Doctorate Address 2013
  • Conversations in Genetics Interview 2016

matthew, meselson, matthew, stanley, meselson, born, 1930, geneticist, molecular, biologist, currently, harvard, university, known, demonstration, with, franklin, stahl, semi, conservative, replication, after, completing, under, linus, pauling, california, ins. Matthew Stanley Meselson born May 24 1930 is a geneticist and molecular biologist currently at Harvard University known for his demonstration with Franklin Stahl of semi conservative DNA replication After completing his Ph D under Linus Pauling at the California Institute of Technology Meselson became a Professor at Harvard University in 1960 where he has remained today as Thomas Dudley Cabot Professor of the Natural Sciences Matthew MeselsonBornMatthew Stanley Meselson 1930 05 24 May 24 1930 age 93 Denver Colorado U S Alma materUniversity of Chicago Ph B 1951 California Institute of Technology Ph D 1957 Known forMeselson Stahl experimentDiscovery of messenger RNADiscovery of restriction enzymesBiological Weapons Convention 1972 Yellow rainAwardsGuggenheim Fellowship MacArthur Fellows Program Genius Award Genetics Society of America Thomas Hunt Morgan Medal for lifetime contributions Lasker Award for Special Achievement in Medical ScienceScientific careerFieldsGeneticsBiochemistryMolecular biologyInstitutionsHarvard University 1960 present Central Intelligence AgencyThesisI Equilibrium sedimentation of macromolecules in density gradients with application to the study of deoxyribonucleic acid II The crystal structure of N N dimethyl malonamide 1957 Doctoral advisorLinus PaulingNotable studentsMark Ptashne Susan Lindquist Richard I Morimoto Sidney Altman Nancy Kleckner Steven HenikoffIn the famous Meselson Stahl experiment of 1958 he and Frank Stahl demonstrated through nitrogen isotope labeling that DNA is replicated semi conservatively 1 In addition Meselson Francois Jacob and Sydney Brenner discovered the existence of messenger RNA in 1961 Meselson has investigated DNA repair in cells and how cells recognize and destroy foreign DNA and with Werner Arber was responsible for the discovery of restriction enzymes Since 1963 he has been interested in chemical and biological defense and arms control has served as a consultant on this subject to various government agencies Meselson worked with Henry Kissinger under the Nixon administration to convince President Richard Nixon to renounce biological weapons suspend chemical weapons production and support an international treaty prohibiting the acquisition of biological agents for hostile purposes which in 1972 became known as the Biological Weapons Convention Meselson has received the Award in Molecular Biology from the National Academy of Sciences the Public Service Award of the Federation of American Scientists the Presidential Award of the New York Academy of Sciences the 1995 Thomas Hunt Morgan Medal of the Genetics Society of America as well as the Lasker Award for Special Achievement in Medical Science His laboratory at Harvard currently investigates the biological and evolutionary nature of sexual reproduction genetic recombination and aging Many of his past students are notable biologists including Nobel Laureate Sidney Altman as well as Mark Ptashne Susan Lindquist Stephen F Heinemann and Richard I Morimoto Contents 1 Early life and education 1 1 Higher education 2 Research 2 1 Meselson effect 3 Chemical and biological weapons defense and disarmament 4 Selected awards 4 1 Honorary doctoral degrees 5 Personal life 6 References 7 External linksEarly life and education editMeselson was born in Denver Colorado on May 24 1930 and attended elementary and high school in Los Angeles California While a young child he was interested in chemistry and physics and conducted many experiments in the natural sciences at home During World War II Meselson attended summer school during summer vacations and received enough high school credits to graduate a year and a half ahead of time When he attempted to acquire his diploma from the registrar at his high school however he was informed that in order to receive his high school diploma he needed three full years of physical education which he lacked After searching for options he enrolled at the University of Chicago at the age of 16 in 1946 intending to study chemistry since it did not require a high school diploma to attend 2 Higher education edit At the University of Chicago Meselson studied liberal arts including history and classics as an undergraduate from 1946 to 1949 after realizing upon arriving that the university had abolished bachelor s degrees in specialized field such as chemistry and physics After completing his studies Meselson spent half a year traveling in Europe where he spend most of his time reading and making friends The devastation of the war was still evident in Europe in 1949 as were the beginning tensions of the Cold War The following year Meselson returned to Caltech to begin freshman studies again but disliked the pedagogical approach in most of the courses he took He enrolled however in Linus Pauling s freshman chemistry course which he loved and worked on a project for Pauling the same year on hemoglobin structure 3 Meselson subsequently returned to the University of Chicago for a year to enroll in courses in chemistry physics and math though he did not receive another degree The following year he was accepted into a graduate physics program at the University of California at Berkeley where he remained for a year In the summer of 1953 Meselson was at a swimming pool party at the Pauling home in Sierra Madre he was friends with Pauling s son Peter and with his daughter Linda and Pauling asked him what he intended to do the following year Upon hearing Meselson respond that he intended to return to the University of Chicago Pauling immediately asked him to come to Caltech to begin graduate studies with him to which Meselson agreed As a graduate student of Linus Pauling in chemistry at the California Institute of Technology 1953 1957 Meselson s doctoral dissertation was on equilibrium density gradient centrifugation and on x ray crystallography Besides Pauling Meselson s dissertation committee also included Jerome Vinograd Richard Feynman and Harden M McConnell 4 Meselson then served as Assistant Professor of Physical Chemistry and then Senior Research Fellow at Caltech until he joined the Harvard faculty in 1960 Research editIn 1957 Meselson and Franklin Stahl as part of the phage group showed that DNA replicates semi conservatively 5 In order to test hypotheses for how DNA replicates Meselson and Stahl together with Jerome Vinograd invented a method that separates macromolecules according to their buoyant density 6 The method equilibrium density gradient centrifugation was sufficiently sensitive that Meselson and Stahl were able to separate DNA containing the heavy isotope of nitrogen 15N from DNA made of the lighter isotope 14N In their classic experiment described and analyzed in a book by science historian Frederic L Holmes 7 they grew the bacterium Escherichia coli for many generations in medium containing 15N as the only nitrogen source and then switched the bacteria to growth medium containing 14N instead They extracted DNA from bacteria prior to switching and at intervals for several generations thereafter After one generation of growth all the DNA was seen to have a density halfway between that of 15N DNA and 14N DNA In successive generations the fraction of DNA that was half heavy fell by a factor of as the total amount of DNA increased two fold When the half heavy DNA was made single stranded by heating it separated into two density species one heavy containing only 15N and one light containing only 14N The experiment implied that upon replication the two complementary strands of the bacterial DNA separate and that each of the single strands directs the synthesis of a new complementary strand a result that verified the suggestion for DNA replication put forward five years earlier by James Watson and Francis Crick 8 and lent important early support for the Watson Crick model of the DNA molecule In collaboration with Jean Weigle Meselson then applied the density gradient method to studies of genetic recombination in the bacteriophage Lambda 9 The question was whether such recombination involved breakage of the recombining DNA molecules or cooperative synthesis of new molecules The question could be answered by examining phage particles derived from co infection of bacteria with genetically marked Lambda phages that were labeled with heavy isotopes 13C and 15N The density gradient method allowed individual progeny phages to be characterized for their inheritance of parental DNA and of parental genetic makers Meselson s initial demonstration of breakage associated replication independent recombination was later found to reflect the activity of a special system that can recombine Lambda DNA at only one spot normally used by the phage to insert itself into the chromosome of a host cell Subsequently variations of the experiment by Franklin Stahl revealed reciprocal dependencies between DNA replication and most genetic recombination 10 With Charles Radding Meselson developed a model for recombination between DNA duplexes that guided research in the field for the decade from 1973 to 1983 11 In 1961 Sydney Brenner Francois Jacob and Meselson used the density gradient method to demonstrate the existence of messenger RNA 12 13 In subsequent work Meselson and his students demonstrated the enzymatic basis of host directed restriction 14 a process by which cells recognize and destroy foreign DNA and then predicted and demonstrated methyl directed mismatch repair 15 16 17 a process that enables cells to correct mistakes in replicating DNA Meselson s current research is aimed at understanding the advantage of sexual reproduction in evolution Meselson and his colleagues have recently demonstrated that Bdelloid rotifers do in fact engage in sexual reproduction employing meiosis of an atypical sort 18 Meselson effect edit When two alleles or copies of a gene within an asexual diploid individual evolve independently of each other they become increasingly different over time This phenomenon of allelic divergence was first described by William Birky 19 but is more commonly known as the Meselson effect In sexual organisms the processes of recombination and independent assortment allow both of the alleles within an individual to descend from a recent single ancestral allele Without recombination or independent assortment alleles cannot descend from a recent ancestral allele Instead the alleles share a last common allelic ancestor at or just preceding the loss of meiotic recombination 20 A striking example of this effect was described in bdelloid rotifers in which the two alleles of the lea gene have diverged into two different genes which work together to preserve the organism during periods of dehydration 21 The Meselson effect should cause entire copies of an organism s genome to diverge from each other effectively reducing all anciently asexual organisms to a haploid state in a process similar to the diploidization following whole genome duplication However gene conversion a form of recombination common in asexual organisms may prevent the Meselson effect from occurring in young asexual organisms 22 and may limit the effect in Bdelloid rotifers 23 Moreover a number of putative examples of the Meselson effect remain controversial because other biological process such as hybridation can mimic the Meselson effect 24 25 26 27 28 Chemical and biological weapons defense and disarmament editIn 1963 Meselson served as a resident consultant in the US Arms Control and Disarmament Agency where he became interested in chemical and biological weapons programs and policies Since then he has been involved in chemical and biological weapons defense and disarmament matters as a consultant to various US government agencies and through the Harvard Sussex Program an academic research organization based at Harvard and at the University of Sussex in the UK of which he and Julian Perry Robinson in the UK are co directors Concluding that biological weapons served no substantial military purpose for the US and that their proliferation would pose a serious threat and that in years ahead the exploitation of advanced biology for hostile purposes would be inimical to society generally he worked to persuade members of the Executive Branch the Congress and the public that the US had no need for such weapons and that there would be benefits in renouncing them and working for worldwide prohibition After President Richard Nixon in 1969 canceled the US BW offensive program and endorsed a UK proposal for an international ban Meselson was among those who successfully advocated international agreements to ban biological and then chemical weapons leading to the Biological Weapons Convention of 1972 and the Chemical Weapons Convention of 1993 Meselson and his colleagues have undertaken three on site investigations with implications for chemical and biological weapons arms control During August and September 1970 on behalf of the American Association for the Advancement of Science Meselson led a team in the Republic of Vietnam in a pilot study of the ecological and health effects of the military use of herbicides 29 30 31 Upon returning to Harvard he and Robert Baughman developed an advanced mass spectrometric method for analysis of the toxic herbicide contaminant dioxin and applied it to environmental and biomedical samples from the Vietnam and the US In December 1970 President Richard Nixon ordered a rapid but orderly phase out of herbicide operations in Vietnam 32 During the 1980s Meselson investigated allegations that yellow rain was a Soviet toxin weapon being used against Hmong tribespeople in Laos Citing the physical appearance and high pollen content of samples of the alleged agent the resemblance of the alleged attacks to showers of feces from swarms of honeybees that he and entomologist Thomas Seeley documented during a 1983 field study in Thailand the inability of US and UK government laboratories to corroborate initial reports of the presence of trichothecene mycotoxins in samples of the alleged agent and in biomedical samples from alleged victims the lack of any supporting evidence from extensive interviews with Vietnamese military defectors and prisoners and other considerations Meselson and his colleagues argued that the allegations were mistaken 33 34 35 36 In April 1980 Meselson served as a resident consultant to the CIA investigating a major outbreak of anthrax among people in the Soviet city of Sverdlovsk He concluded that on the basis of available evidence the official Soviet explanation that the outbreak was caused by consumption of meat from infected cattle was plausible but that there should be an independent on site investigation After the collapse of the Soviet Union he was allowed to bring a team to Sverdlovsk in 1992 and again in 1993 Their reports conclusively showed that the official Soviet explanation was wrong and that the outbreak was caused by the release of an anthrax aerosol at a military biological facility in the city 37 38 Meselson is a member of the U S National Academy of Sciences the American Academy of Arts and Sciences the American Philosophical Society the Academie des Sciences Paris the Royal Society London and the Russian Academy of Sciences and has received numerous awards and honors in the field of science and in public affairs He has served on the Council of the National Academy of Sciences the Council of the Smithsonian Institution the Arms Control and Non Proliferation Advisory Board to the US Secretary of State and the Committee on International Security and Arms Control of the US National Academy of Sciences He is past President of the Federation of American Scientists and presently is co director of the Harvard Sussex Program on Chemical and Biological Weapons and a member of the board of directors of the Belfer Center for Science and International Affairs at the John F Kennedy School of Government at Harvard University Selected awards edit1963 US National Academy of Sciences Prize for Molecular Biology 1964 Eli Lilly Award in Microbiology or Immunology 1966 Guggenheim Fellowship 1971 Alumni Medal University of Chicago Alumni Association 1972 Public Service Award Federation of American Scientists 1975 Alumni Distinguished Service Award California Institute of Technology 1975 Lehman Award New York Academy of Sciences 1978 Leo Szilard Award American Physical Society 1983 Presidential Award New York Academy of Sciences 1984 MacArthur Fellows Program Fellowship 1990 Scientific Freedom and Responsibility Award American Association for the Advancement of Science 1995 Genetics Society of America Thomas Hunt Morgan Medal for lifetime contributions 2002 Public Service Award American Society for Cell Biology 2004 Lasker Award for Special Achievement in Medical Science 2005 Life Member of the New York Academy of Sciences 2008 Mendel Medal of the UK Genetics Society 2019 Future of Life Award for helping ban bioweapons 39 Honorary doctoral degrees edit 1966 Oakland University 1971 Columbia University 1975 University of Chicago 1987 Yale University 1988 Princeton University 2003 Northwestern University 2013 McGill University 2017 Rockefeller UniversityPersonal life editHe married three times first to Katherine Kaynis then to Sarah Page with whom he had two daughters Amy and Zoe His third marriage was to Jeanne Guillemin with whom he shares two stepsons 40 References edit Meselson Stahl and the Replication of DNA A History of The Most Beautiful Experiment in Biology Frederic Lawrence Holmes Yale University Press 2001 ISBN 0300085400 Meselson M 2003 Interview with Matthew Meselson PDF BioEssays 25 12 1236 1246 doi 10 1002 bies 10374 PMID 14635259 Meselson M 2003 Interview with Matthew Meselson PDF BioEssays 25 12 1236 1246 doi 10 1002 bies 10374 PMID 14635259 Holmes Frederic Lawrence 2001 Meselson Stahl and the Replication of DNA A History of The Most Beautiful Experiment in Biology New Haven Yale University Press p 265 ISBN 9780300129663 Retrieved June 28 2023 Meselson M Stahl F 1958 The Replication of DNA in E coli Proceedings of the National Academy of Sciences USA 44 7 671 682 Bibcode 1958PNAS 44 671M doi 10 1073 pnas 44 7 671 PMC 528642 PMID 16590258 Meselson M Stahl F Vinograd J 1957 Equilibrium Sedimentation of Macromolecules in Density Gradients Proceedings of the National Academy of Sciences USA 43 7 581 588 Bibcode 1957PNAS 43 581M doi 10 1073 pnas 43 7 581 PMC 528502 PMID 16590059 Meselson Stahl and the Replication of DNA A History of The Most Beautiful Experiment in Biology Frederic Lawrence Holmes Yale University Press 2001 ISBN 0300085400 Watson J D Crick F H C 1953 Genetical Implications of the Structure of Deoxyribonucleic Acid Nature 171 4361 964 967 doi 10 1038 171964a0 PMID 13063483 Meselson M Weigle J 1961 Chromosome Breakage Accompanying Genetic Recombination in Bacteriophage Proceedings of the National Academy of Sciences USA 47 6 857 868 Bibcode 1961PNAS 47 857M doi 10 1073 pnas 47 6 857 PMC 221352 PMID 13769766 Stahl F W 1998 Recombination in phage l one geneticist s historical perspective Gene 223 95 102 10 1016 S0378 1119 98 00246 7 Meselson M Radding C 1975 A General Model for Genetic Recombination Proceedings of the National Academy of Sciences USA 72 1 358 361 Bibcode 1975PNAS 72 358M doi 10 1073 pnas 72 1 358 PMC 432304 PMID 1054510 Brenner S Jacob F Meselson M 1961 An Unstable Intermediate Carrying Information from Genes to Ribosomes for Protein Synthesis Nature 190 4776 576 581 Bibcode 1961Natur 190 576B doi 10 1038 190576a0 PMID 20446365 S2CID 4200865 Meselson M 2014 Francois and X Research in Microbiology 165 5 313 315 doi 10 1016 j resmic 2014 05 004 PMID 24853970 Meselson M Yuan R 1968 DNA Restriction Enzyme from E coli Nature 217 5134 1110 1114 Bibcode 1968Natur 217 1110M doi 10 1038 2171110a0 PMID 4868368 S2CID 4172829 Wagner R Jr Meselson M 1976 Repair Tracts in Mismatch DNA Heteroduplexes Proceedings of the National Academy of Sciences USA 73 11 4135 4139 Bibcode 1976PNAS 73 4135W doi 10 1073 pnas 73 11 4135 PMC 431357 PMID 1069303 Radman M R E Wagner Jr B W Glickman and M Meselson 1980 DNA Methylation Mismatch Correction and Genetic Stability in Progress in Environmental Mutagenesis ed M Alacevic Amsterdam Elsevier North Holland Biomedical Press pp 121 130 ISBN 044480241X Pukkila P J Peterson J Herman G Modrich P Meselson M 1983 Effects of High Levels of DNA Adenine Methylation on Methyl Directed Mismatch Repair in E coli Genetics 104 4 571 582 doi 10 1093 genetics 104 4 571 PMC 1202127 PMID 6225697 Signorovitch Ana Hur Jae Gladyshev Eugene Meselson Matthew June 1 2015 Allele Sharing and Evidence for Sexuality in a Mitochondrial Clade of Bdelloid Rotifers Genetics 200 2 581 590 doi 10 1534 genetics 115 176719 ISSN 0016 6731 PMC 4492381 PMID 25977472 Birky C W 1996 Heterozygosity Heteromorphy and Phylogenetic Trees in Asexual Eukaryotes Genetics 144 1 427 437 doi 10 1093 genetics 144 1 427 PMC 1207515 PMID 8878706 Butlin R 2002 OPINION EVOLUTION OF SEXThe costs and benefits of sex New insights from old asexual lineages Nature Reviews Genetics 3 4 311 317 doi 10 1038 nrg749 PMID 11967555 S2CID 5771780 Pouchkina Stantcheva N N McGee B M Boschetti C Tolleter D Chakrabortee S Popova A V Meersman F Macherel D Hincha D K Tunnacliffe A 2007 Functional Divergence of Former Alleles in an Ancient Asexual Invertebrate Science 318 5848 268 271 Bibcode 2007Sci 318 268P doi 10 1126 science 1144363 PMID 17932297 S2CID 30678095 Tucker AE Ackerman MA Eads BD Xu S Lynch M 2013 Population genomic insights into the evolutionary origin and fate of obligately asexual Daphnia pulex PNAS 110 39 15740 15745 Bibcode 2013PNAS 11015740T doi 10 1073 pnas 1313388110 PMC 3785735 PMID 23959868 Flot J F Hespeels B Li X Noel B Arkhipova I Danchin EGJ Hejnol A Henrissat B Koszul R Aury JM Barbe V Barthelemy RM et al 2013 Schon I Martens K Dijk P 2009 Lost Sex The Evolutionary Biology of Parthenogenesis The Netherlands Springer 615 p chapter 13 Schaefer I Domes K Heethoff M Schneider K SCHON I Norton R A Scheu S Maraun M 2006 No evidence for the Meselson effect in parthenogenetic oribatid mites Oribatida Acari Journal of Evolutionary Biology 19 1 184 193 doi 10 1111 j 1420 9101 2005 00975 x PMID 16405590 S2CID 36317445 Mark Welch David B Mark Welch Jessica L Meselson Matthew 2008 Evidence for degenerate tetraploidy in bdelloid rotifers PNAS 105 13 5145 5149 Bibcode 2008PNAS 105 5145M doi 10 1073 pnas 0800972105 PMC 2278229 PMID 18362354 Hur Jae H Van Doninck Karine Mandigo Morgan L Meselson Matthew 2009 Degenerate Tetraploidy Was Established Before Bdelloid Rotifer Families Diverged PDF Mol Biol Evol 26 2 375 383 doi 10 1093 molbev msn260 PMID 18996928 Stoeckel S Masson J P 2014 The Exact Distributions of FIS under Partial Asexuality in Small Finite Populations with Mutation PLOS ONE 9 1 e85228 Bibcode 2014PLoSO 985228S doi 10 1371 journal pone 0085228 PMC 3897417 PMID 24465510 Meselson M Constable J 1971 The Ecological Impact of Large Scale Defoliation in Vietnam Sierra Club Bulletin 56 4 9 Statement at hearing Chemical and Biological Warfare Committee on Foreign Relations U S Senate secret hearing held April 30 1969 sanitized and printed June 23 1969 50 pp SUDOC Y4 F76 2 W23 2 Meselson M 2017 From Charles and Francis Darwin to Richard Nixon The Origin and Termination of Anti plant Chemical Warfare in Vietnam in Friedrich et al eds 100 Years of Chemical Warfare Research Deployment Consequences Springer International pp 325 338 https www amazon com One Hundred Years Chemical Warfare dp 3319516639 ref sr 1 fkmr0 1 ie UTF8 amp qid 1509033228 amp sr 8 1 fkmr0 amp keywords 100 years of chemical warfare Richard Lyons New York Times December 26 1970 Military to Curb Use of Herbicides https timesmachine nytimes com timesmachine 1970 12 27 82609457 pdf Nowicke J Meselson M 1984 Yellow Rain A Palynological Analysis Nature 309 5965 205 206 Bibcode 1984Natur 309 205N doi 10 1038 309205a0 PMID 6717598 S2CID 38336939 Seeley T D Nowicke J W Meselson M Guillemin J Akratanakul P 1985 Yellow Rain Scientific American 253 3 128 137 Bibcode 1985SciAm 253c 128S doi 10 1038 scientificamerican0985 128 Meselson M and J P Robinson 2008 The Yellow Rain Affair Lessons from a Discredited Allegation Chapter 4 in Terrorism War or Disease Unraveling the Use of Biological Weapons eds S Clunan P Levoy S Martin Stanford University Press pp 72 96 ISBN 9780804759762 Pribbenow Merle L 2006 Yellow Rain Lessons from an Earlier WMD Controversy International Journal of Intelligence and CounterIntelligence 19 4 737 745 doi 10 1080 08850600600656525 S2CID 153913163 Meselson M Guillemin J Hugh Jones M Langmuir A Popova I Shelokov A Yampolskaya O 1994 The Sverdlovsk Anthrax Outbreak of 1979 Science 266 5188 1202 1208 Bibcode 1994Sci 266 1202M doi 10 1126 science 7973702 PMID 7973702 Guillemin J 2001 Anthrax investigation of a deadly outbreak University of California Press ISBN 9780520229174 Piper Kelsey April 9 2019 The man who stopped America s biological weapons program Vox retrieved March 2 2022 Obituaries Amy Meselson 46 Immigrant Defender The New York Times August 8 2018External links editDiplomacy Light Podcast 3 BWC at Fifty Matthew Meselson John Walker and Sergey Batsonov Xapiens Podcast Ending Biological Warfare COVID Henry Kissinger mRNA Meselson Stahl Mathew Meselson Matthew Meselson s bio at Harvard Kennedy School Video of a talk by Meselson titled Linus Pauling as an Educator iBio The Semi Conservative Replication of DNA McGill Honorary Doctorate Address 2013 Conversations in Genetics Interview 2016 Retrieved from https en wikipedia org w index php title Matthew Meselson amp oldid 1191264435, wikipedia, wiki, book, books, library,

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