Philip Hanawalt

Last updated
Philip Courtland Hanawalt
Born1931 (age 9192)
Nationality American
Alma mater Deep Springs College
Yale University,
Oberlin College
Known fordiscovery of the process of repair replication of damaged DNA and the ubiquitous process of DNA excision repair.
SpouseGraciela Spivak
Children4, including Lisa Hanawalt
Scientific career
Fields biophysics, cancer biology, dermatology
Institutions University of Copenhagen
California Institute of Technology
Stanford University
Doctoral advisor Richard Setlow

Philip C. Hanawalt (born 1931) [1] is an American biologist who discovered the process of repair replication of damaged DNA in 1963. He is also considered the co-discoverer of the ubiquitous process of DNA excision repair along with his mentor, Richard Setlow, and Paul Howard-Flanders. He holds the Dr. Morris Herzstein Professorship in the Department of Biology at Stanford University, [1] with a joint appointment in the Dermatology Department in Stanford University School of Medicine.

Contents

Early life and education

Philip C. Hanawalt was born on 1931 in Akron, Ohio. [1] He was raised in Midland, Michigan. [1] Having an interest in electronics from youth, Hanawalt earned an honorable mention in the 1949 Westinghouse Science Talent Search, receiving a scholarship to attend Deep Springs College. Hanawalt eventually transferred to Oberlin College where he received his B.A. degree in physics in 1954. He received his M.S. degree in physics from Yale University in 1955. Hanawalt also received his Ph.D. in Biophysics from Yale University in 1959. His doctoral thesis advisor was Richard Setlow. [2]

He undertook three years of postdoctoral study at the University of Copenhagen, Denmark, and at the California Institute of Technology before joining the faculty at Stanford in 1961. [1]

DNA repair

DNA repair is the process by which all living cells deal with damage to their genetic material. Such damage occurs as a consequence of exposure to environmental radiations and genotoxic chemicals, but also to endogenous oxidations and the intrinsic instability of DNA. Hanawalt and his colleagues discovered a special pathway of excision repair, called transcription-coupled repair, which is targeted to expressed genes, and he studies several diseases characterized by defects in DNA repair pathways. [1] DNA repair is important for protecting against cancer and some aspects of ageing in humans, and its deficiency has been implicated in the etiology of a number of hereditary diseases.

Career

In 1965 Hanawalt became associate professor in the Department of Biological Sciences at Stanford, and was promoted to professor in 1970. [1]

He has served on the Board of Trustees and is now an Honorary Trustee of Oberlin College. [3] He has received an Honorary Doctor of Science Degree from Oberlin and the Doctor Honoris Causa from both the University of Seville, Spain, [4] and the University of the Bío-Bío, Chile.

Hanawalt was elected to the United States National Academy of Sciences in 1989, and to the American Academy of Arts and Sciences in 2008. He is a Fellow of the American Association for the Advancement of Science and the American Academy of Microbiology, and he is a Foreign Associate of the European Molecular Biology Organization (EMBO). He currently serves on the Editorial Board of the Proceedings of the National Academy of Sciences , and as a Senior Editor for the journal, Cancer Research . He has served on the Board of Directors for the American Association for Cancer Research (AACR). He has served on many editorial boards and advisory committees in academia and government.

He has trained 29 Ph.D. students at Stanford and many postdoctoral researchers. Thirty-five different countries are represented among the participants in his research group over the past 48 years.

Awards and honors

Hanawalt won the Excellence in Teaching Award from the Northern California chapter of Phi Beta Kappa in 1991, and the Peter and Helen Bing Award for Distinguished Teaching at Stanford University. He has won annual research awards from the American Society for Photobiology and the Environmental Mutagen Society (EMS) in 1992, from which he also received the annual Student Mentoring Award. [1]

He won the International Mutation Research Award for Excellence in Scientific Achievement in 1987, and the Princess Takamatsu Cancer Foundation Annual Lectureship in Japan in 1999 and he was more recently a visiting scholar at the Graduate School of Frontier Biosciences, Osaka University.

He has served as president of the EMS and was the president/organizer of the 9th International Conference on Environmental Mutagens (ICEM) in San Francisco in 2005. In 2009 he delivered the Keynote Lecture for the 10th ICEM in Florence, Italy. He has organized many meetings on DNA repair, including the first international conference in this field, at Squaw Valley, CA, in 1974, and subsequent Gordon Conferences on Mutagenesis and on Mammalian DNA Repair.

Personal life

Hanawalt is married to Graciela Spivak and has 4 children, [2] the first two children from a previous marriage to Joanna Thomas Hanawalt: David, Steve, Alex, and famed cartoonist and television producer, Lisa Hanawalt. [5] Hanawalt lives in Palo Alto, California.

Notes

  1. 1 2 3 4 5 6 7 8 Kresge, Nicole; Simoni, Robert D. (August 20, 2010). "Discovery and Characterization of DNA Excision Repair Pathways: the Work of Philip Courtland Hanawalt" (PDF). The Journal of Biological Chemistry. 285 (34): e9–e11. doi: 10.1074/jbc.O110.000232 . PMC   2938028 . PMID   20740724.
  2. 1 2 Bergeron, Louis (2011-05-17). "Philip Hanawalt wins Princess Takamatsu award, looks back on 50 years at Stanford and ahead to turning 80". Stanford University. Retrieved 2021-06-17.
  3. "Office of the General Counsel and Secretary; Honorary Trustees". Oberlin College. Retrieved 12 December 2010.
  4. Sevilla, Universidad de (2008). Acto de Investidura como Doctor Honoris Causa de la Universidad de Sevilla del Profesor Dr. Philip C. Hanawalt[Act of Investiture as Doctor Honoris Causa from the University of Seville of Professor Dr. Philip C. Hanawalt] (in Spanish). ISBN   978-84-472-1163-0.
  5. Bartlett, Amanda (2021-06-17). "A fan petition saved this cult Netflix hit from cancellation". SFGATE. Retrieved 2021-06-17.{{cite web}}: CS1 maint: url-status (link)

Related Research Articles

Mutagenesis is a process by which the genetic information of an organism is changed by the production of a mutation. It may occur spontaneously in nature, or as a result of exposure to mutagens. It can also be achieved experimentally using laboratory procedures. A mutagen is a mutation-causing agent, be it chemical or physical, which results in an increased rate of mutations in an organism's genetic code. In nature mutagenesis can lead to cancer and various heritable diseases, and it is also a driving force of evolution. Mutagenesis as a science was developed based on work done by Hermann Muller, Charlotte Auerbach and J. M. Robson in the first half of the 20th century.

<span class="mw-page-title-main">Mutagen</span> Physical or chemical agent that increases the rate of genetic mutation

In genetics, a mutagen is a physical or chemical agent that permanently changes genetic material, usually DNA, in an organism and thus increases the frequency of mutations above the natural background level. As many mutations can cause cancer in animals, such mutagens can therefore be carcinogens, although not all necessarily are. All mutagens have characteristic mutational signatures with some chemicals becoming mutagenic through cellular processes.

<span class="mw-page-title-main">Nucleotide excision repair</span> DNA repair mechanism

Nucleotide excision repair is a DNA repair mechanism. DNA damage occurs constantly because of chemicals, radiation and other mutagens. Three excision repair pathways exist to repair single stranded DNA damage: Nucleotide excision repair (NER), base excision repair (BER), and DNA mismatch repair (MMR). While the BER pathway can recognize specific non-bulky lesions in DNA, it can correct only damaged bases that are removed by specific glycosylases. Similarly, the MMR pathway only targets mismatched Watson-Crick base pairs.

Gilbert Chu is an American biochemist. He is a Professor of Medicine (Oncology) and Biochemistry at the Stanford Medical School.

Miroslav Radman is a Croatian biologist.

Richard D. Wood is an American molecular biologist specializing in research on DNA repair and mutation. He is known for pioneering studies on nucleotide excision repair (NER), particularly for reconstituting the minimum set of proteins involved in this process, identifying proliferating cell nuclear antigen (PCNA) as part of the NER complex and identifying mammalian repair polymerases.

Transcription factor II Human is an important protein complex, having roles in transcription of various protein-coding genes and DNA nucleotide excision repair (NER) pathways. TFIIH first came to light in 1989 when general transcription factor-δ or basic transcription factor 2 was characterized as an indispensable transcription factor in vitro. This factor was also isolated from yeast and finally named as TFIIH in 1992.

<span class="mw-page-title-main">W. Brian Arthur</span>

William Brian Arthur is an economist credited with developing the modern approach to increasing returns. He has lived and worked in Northern California for many years. He is an authority on economics in relation to complexity theory, technology and financial markets. He has been on the external faculty at the Santa Fe Institute, and a Visiting Researcher at the Intelligent Systems Lab at PARC. He is credited with the invention of the El Farol Bar problem.

<span class="mw-page-title-main">RAD23B</span>

UV excision repair protein RAD23 homolog B is a protein that in humans is encoded by the RAD23B gene.

<span class="mw-page-title-main">Graham C. Walker</span>

Graham Charles Walker is an American biologist, notable for his work explicating the structure and function of proteins involved in DNA repair and mutagenesis, with applications for cancer, and for understanding rhizobium (bacterial) functions that infect plants and mammals.

<span class="mw-page-title-main">Leon O. Chua</span> American electrical engineer and computer scientist

Leon Ong Chua is an American electrical engineer and computer scientist. He is a professor in the electrical engineering and computer sciences department at the University of California, Berkeley, which he joined in 1971. He has contributed to nonlinear circuit theory and cellular neural network theory.

Lennart Ljung is a Swedish professor in the Chair of Control Theory at Linköping University since 1976. He is known for his pioneering research in system identification, and is regarded as a leading researcher in control theory.

<span class="mw-page-title-main">Lui Che-woo</span>

Lui Che Woo, GBM, MBE, JP (Chinese: 呂志和; Sidney Lau: Lui5 Ji3 Woh6) (born 9 August 1929, Jiangmen, China) is a Hong Kong business magnate, investor, and philanthropist. He is a member of the standing committee of the Chinese People's Political Consultative Conference, Jiangmen, People's Republic of China, and is a Hong Kong gambling magnate, founder and chairman of listed firms Galaxy Entertainment Group and K. Wah International Holdings Ltd. As of June 2021, he had an estimated net worth of US$19.0 billion and ranked the fourth richest man in Hong Kong according to Bloomberg Billionaires Index.

<span class="mw-page-title-main">Stephen C. West</span>

Stephen Craig West FRS is a British biochemist and molecular biologist specialising in research on DNA recombination and repair. He is known for pioneering studies on genome instability diseases including cancer. West obtained his BSc in 1974, and his PhD in 1977, both from Newcastle University. He is currently a Principal Group Leader at the Francis Crick Institute in London. He is an honorary Professor at University College London, and at Imperial College London. In recognition of his work he was awarded the Louis-Jeantet Prize for Medicine in 2007, is a fellow of the Royal Society, the Academy of Medical Sciences, an International Member of the National Academy of Sciences, and an International Honorary Member of the American Academy of Arts and Sciences. He received the 2022 Royal Medal for 'discovering and determining the functions of key enzymes that are essential for DNA recombination, repair and the maintenance of genomes'.

<span class="mw-page-title-main">Bruce William Stillman</span> Australian biochemist and cancer researcher

Bruce William Stillman, AO, FAA, FRS is a biochemist and cancer researcher who has served as the Director of Cold Spring Harbor Laboratory (CSHL) since 1994 and President since 2003. He also served as the Director of its NCI-designated Cancer Center for 25 years from 1992 to 2016. During his leadership, CSHL has been ranked as the No. 1 institution in molecular biology and genetics research by Thomson Reuters. Stillman's research focuses on how chromosomes are duplicated in human cells and in yeast Saccharomyces cerevisiae; the mechanisms that ensure accurate inheritance of genetic material from one generation to the next; and how missteps in this process lead to cancer. For his accomplishments, Stillman has received numerous awards, including the Alfred P. Sloan, Jr. Prize in 2004 and the 2010 Louisa Gross Horwitz Prize, both of which he shared with Thomas J. Kelly of Memorial Sloan-Kettering Cancer Center, as well as the 2019 Canada Gairdner International Award for biomedical research, which he shared with John Diffley.

<span class="mw-page-title-main">Leona D. Samson</span> Biological engineer (born 1952)

Leona D. Samson is the Uncas and Helen Whitaker Professor and American Cancer Society Research Professor of Biological Engineering at the Massachusetts Institute of Technology, where she served as the Director of the Center for Environmental Health Sciences from 2001 to 2012. Before her professorship at MIT, she held a professorship at the Harvard School of Public Health. She is on the editorial board of the journal DNA Repair. Her research interests focus on "methods for measuring DNA repair capacity (DRC) in human cells", research the National Institute of Health recognized as pioneering in her field, for which the NIH granted her the National Institutes of Health Director's Pioneer Award.

Antimutagens are the agents that interfere with the mutagenicity of a substance. The interference can be in the form of prevention of the transformation of a promutagenic compound into actual active mutagen, inactivation, or otherwise the prevention of Mutagen-DNA reaction.

<span class="mw-page-title-main">Stephen Jackson (scientist)</span> British biologist

Stephen Philip Jackson, FRS, FMedSci, is the Frederick James Quick Professor of Biology. He is a Senior Group Leader and Head of Cancer Research UK Laboratories at the Gurdon Institute.

Mutational signatures are characteristic combinations of mutation types arising from specific mutagenesis processes such as DNA replication infidelity, exogenous and endogenous genotoxin exposures, defective DNA repair pathways, and DNA enzymatic editing.

<span class="mw-page-title-main">Orlando D. Schärer</span> Chemist and biologist

Orlando David Schärer is a chemist and biologist researching DNA repair, genomic integrity, and cancer biology. Schärer has taught biology, chemistry and pharmacology at various university levels on three continents. He is a distinguished professor at the Ulsan National Institute of Science and Technology (UNIST) and the associate director of the IBS Center for Genomic Integrity located in Ulsan, South Korea. He leads the three interdisciplinary research teams in the Chemical & Cancer Biology Branch of the center and specifically heads the Cancer Therapeutics Mechanisms Section.