Roger Y. Tsien
Tsien in 2008
Tsien Yonchien (錢永健)
February 1, 1952
New York, New York, U.S.
|Died||August 24, 2016 (aged 64)|
|Residence||San Diego, California|
|Thesis||The design and use of organic chemical tools in cellular physiology (1976)|
|Doctoral advisor||Richard Adrian|
Roger Yonchien Tsien (Chinese: 錢永健; February 1, 1952 – August 24, 2016) was a Chinese-American biochemist. He was a professor of chemistry and biochemistry at the University of California, San Diego and was awarded the 2008 Nobel Prize in Chemistry for his discovery and development of the green fluorescent protein, in collaboration with organic chemist Osamu Shimomura and neurobiologist Martin Chalfie. Tsien was also a pioneer of calcium imaging.
Tsien was born in New York, in 1952. He grew up in Livingston, New Jersey and attended Livingston High School there. His Han Chinese family was originally from Hangzhou, China. His father Hsue-Chu Tsien, who was a mechanical engineer, had excelled academically and graduated at the top of his university class.
Tsien suffered from asthma as a child, and as a result, he was often indoors. He spent hours conducting chemistry experiments in his basement laboratory. When he was 16, he won first prize in the nationwide Westinghouse Talent Search with a project investigating how metals bind to thiocyanate.
Tsien attended Harvard College on a National Merit Scholarship, where he was elected to Phi Beta Kappa as a junior. He graduated summa cum laude with a Bachelor of Science in chemistry and physics in 1972. According to his freshman-year roommate, economist and Iowa politician Herman Quirmbach, "It's probably not an exaggeration to say he's the smartest person I ever met ... [a]nd I have met a lot of brilliant people."
After completing his bachelor's degree, Tsien joined the Physiological Laboratory at the University of Cambridge in Cambridge, England with the aid of a Marshall Scholarship, and resided at Churchill College, Cambridge. He received his Ph.D. in physiology in 1977 for research on The Design and Use of Organic Chemical Tools in Cellular Physiology  formally supervised by Richard Adrian in the Department of Physiology and assisted by Andy Holmes, Gerry Smith and Jeremy Sanders in the Department of Chemistry.
Research and career
Following his Ph.D., Tsien was a Research Fellow at Gonville and Caius College, Cambridge from 1977 to 1981. He was appointed to the faculty at the University of California, Berkeley, from 1982 to 1989. Beginning in 1989, he worked at the University of California, San Diego, as Professor of Pharmacology and Professor of Chemistry and Biochemistry, and as an investigator of the Howard Hughes Medical Institute.
Tsien contributed to the fields of cell biology and neurobiology by discovering genetically programmable fluorescent tags, thereby allowing scientists to watch the behavior of molecules in living cells in real time. He also developed fluorescent indicators of calcium ions and other ions important in biological processes.
In 2004, Tsien was awarded the Wolf Prize in Medicine "for his seminal contribution to the design and biological application of novel fluorescent and photolabile molecules to analyze and perturb cell signal transduction."
The multicolored fluorescent proteins developed in Tsien's lab are used by scientists to track where and when certain genes are expressed in cells or in whole organisms. Typically, the gene coding for a protein of interest is fused with the gene for a fluorescent protein, which causes the protein of interest to glow inside the cell when the cell is irradiated with ultraviolet light and allows microscopists to track its location in real time. This is such a popular technique that it has added a new dimension to the fields of molecular biology, cell biology, and biochemistry.
Since the discovery of the wild type GFP, numerous different mutants of GFP have been engineered and tested. The first significant leap forward was a single point mutation (S65T) reported by Tsien in 1995 in Nature. This mutation dramatically improved the fluorescent (both intensity and photostability) and spectral characteristics of GFP. A shift of the major excitation peak to 488 nm with the emission peak staying at 509 nm thus can be clearly observed, which matched very well the spectral characteristics of commonly available FITC facilities. All these then largely amplified the practicality of using GFP by scientists in their research. Tsien mainly contributed to much of our understanding of how GFP works and for developing new techniques and mutants of GFP.
Former trainees of Roger Y. Tsien include Atsushi Miyawaki and Alice Y. Ting.
Timelines of GFP-development involved by Tsien:
- 1994: Tsien showed the mechanism that GFP chromophore is formed in a chemical reaction which requires oxygen but without help from the other proteins.
- 1994–1998: Tsien and collaborators made various GFP mutants by genetic modification and structural tweaking. Newly created variants of GFP can shine more brightly and show different colours, such as yellow, cyan, and blue.
- 2000–2002: Tsien produced monomeric variants of DsRED, which can glow in shades of red, pink, and orange. Remarkably, since then complicated marcromolecular networks of living organisms can be labelled or marked by using "all the colours of the rainbow".
Other detailed highlights involved by Tsien:
- 2002: The critical structural difference between GFP and DsRed was revealed. One extra double-bond in the chromophore of DsRed extends its conjugation thus causes the red-shift.
- 2002: Monomeric DsRed (mRFP) was first developed.
- 2004: New "fruit" FPs were generated (by in vitro and in vivo directed evolutions).
In 2009, a new kind of Infrared Fluorescent Protein (IFP) was developed by Tsien's group, and further reported and described by Science. The new IFPs are developed from bacterial phytochromes instead of from multicellular organism like jellyfish. Under normal conditions, bacterial phytochromes absorb light for signaling instead of fluorescence, but they can be turned fluorescent after deleting some of the signaling parts by genetic means such as site-directed mutagenesis. In order to fluoresce, IFPs require an exogenous chromophore, biliverdin.
In 2016, a new class of fluorescent protein was evolved from a cyanobacterial (Trichodesmium erythraeum) phycobiliprotein, α-allophycocyanin, and named small ultra red fluorescent protein (smURFP). smURFP autocatalytically self-incorporates the chromophore biliverdin without the need of an external protein, known as a lyase. Jellyfish- and coral-derived fluorescent proteins require oxygen and produce a stoichiometric amount of hydrogen peroxide upon chromophore formation. smURFP does not require oxygen or produce hydrogen peroxide and uses the chromophore, biliverdin. smURFP has a large extinction coefficient (180,000 M−1 cm−1) and has a modest quantum yield (0.20), which makes it comparable biophysical brightness to eGFP and ~2-fold brighter than most red or far-red fluorescent proteins derived from coral. smURFP spectral properties are similar to the organic dye Cy5.
Tsien was a pioneer of calcium imaging and known for developing various dyes which become fluorescent in the presence of particular ions such as calcium. One such dye, Fura-2, is widely used to track the movement of calcium within cells. Indo-1, another popular calcium indicator, was also developed by Tsien's group in 1985. He has also developed fluorescent indicators for other ions such as magnesium, zinc, copper, iron, lead, cadmium, aluminum, nickel, cobalt, and mercury.
Aequorin is also a useful tool to indicate calcium level inside cells; however, it has some limitations, primarily is that its prosthetic group coelenterazine is consumed irreversibly when emits light, thus requires continuous addition of coelenterazine into the media. To overcome such issues, Tsien's group also developed the calmodulin-based sensor, named Cameleon.
- "FLASH-EDT2": Fluorescein arsenical helix binder, bis-EDT adduct,
- "EDT": 1,2-ethanedithiol.
Fluorescence-assisted cancer surgery
Mouse experiments by Tsien's group suggest that cancer surgery can be guided and assisted by fluorescent peptides. The peptides are used as probes, and are harmless to living tissues and organs. Their lifetime in the body is only 4 or 5 days. Clinical trials are awaited.
Tsien was also a notable biochemical inventor and holds or co-holds about 100 patents till 2010. In 1996, Tsien co-founded the Aurora Biosciences Corporation, which went public in 1997. In 2001, Aurora was acquired by the Vertex Pharmaceuticals. Similarly, Tsien was also a scientific co-founder of Senomyx in 1999.
According to the Qian (Tsien) clan genealogy book, Tsien is a 34th-generational descendant of King Qian Liu of the Wuyue Kingdom of ancient China. His family belongs to the line of King Qian Hongzong. Tsien's parents Hsue-Chu Tsien and Yi-Ying Li (李懿颖) came from Hangzhou and Beijing, respectively.
Tsien had a number of engineers in his extended family, including his father Hsue-Chu Tsien who was an MIT-educated mechanical engineer and his mother's brothers Y. T. Li (李耀滋) and Shihying Lee (李诗颖), who were engineering professors at MIT. Tsien's mother Yi-Ying Li was a nurse. The famous rocket scientist Tsien Hsue-shen, regarded as the co-founding father of the Jet Propulsion Laboratory of the California Institute of Technology and, later, the director of the Chinese ballistic-missile and space programs, is a cousin of Tsien's father.
Tsien was the younger brother of Richard Tsien, a renowned scientist currently at New York University, and Louis Tsien, a software engineer. Tsien, who called his own work molecular engineering, once said, "I'm doomed by heredity to do this kind of work."
He was married to Wendy Globe.
On August 31, 2016, a press release by UC San Diego announced the death of Prof. Tsien. He died on August 24, 2016. Although the actual cause of death is yet to be determined, he seemed to have died while on a bike trail in Eugene, Oregon. Prior to his death, Tsien had survived cancer and suffered a stroke in 2013.
"He was ahead of us all," said Tsien's wife, Wendy. "He was ever the adventurer, the pathfinder, the free and soaring spirit. Courage, determination, creativity and resourcefulness were hallmarks of his character. He accomplished much. He will not be forgotten."
Awards and honors
Roger Y. Tsien has received numerous honors and awards in his life, including:
- National 1st Prize, Westinghouse Science Talent Search (1968)
- National Merit Scholarship, USA (1968)
- Detur Prize, Harvard College (1969)
- Marshall Scholarship, British government (1972)
- Comyns Berkeley Research Fellowship, Gonville and Caius College, Cambridge (1977)
- Gedge Prize, University of Cambridge (1978)
- Searle Scholar, Searle Scholar program (1983)
- Lamport Prize, New York Academy of Sciences (1986)
- Javits Neuroscience Investigator Award, National Institute of Neurological Disorders and Stroke (1989)
- Young Scientist Award, Passano Foundation (1991)
- W. Alden Spencer Award in Neurobiology, Columbia University (1991)
- Artois-Baillet-Latour Health Prize, Belgium (1995)
- Gairdner Foundation International Award, Canada (1995)
- Basic Research Prize, American Heart Association (1995)
- Elected to the United States Institute of Medicine (1995)
- Doctorate honoris causa, Katholieke Universiteit Leuven, Belgium (1995)
- Faculty Research Lecturer, UC San Diego (1997)
- Elected to the American Academy of Arts and Sciences (1998)
- Elected to the United States National Academy of Sciences (1998)
- Award for Innovation in High Throughput Screening, Society for Biomolecular Screening (1998)
- Pearse Prize, Royal Microscopical Society (2000)
- ACS Award for Creative Invention, American Chemical Society (2002)
- Christian B. Anfinsen Award, Protein Society (2002)
- Heineken Prize for Biochemistry and Biophysics, Royal Netherlands Academy of Arts and Sciences (2002)
- Max Delbrück Medal, Max Delbrück Centrum für Molekulare Medizin, Berlin (2002)
- Wolf Prize in Medicine, Israel (2004)
- Keio Medical Science Prize, Japan (2004)
- UCSD Chancellor's Associates Award for Excellence in Science & Engineering Research, UC San Diego (2004)
- Perl-UNC Neuroscience Prize, University of North Carolina (2004)
- Associate EMBO Member of the European Molecular Biology Organization 2005.
- J.Allyn Taylor International Prize in Medicine, Robarts Research Institute, Canada (2005)
- ABRF Award, Association of Biomolecular Resource Facilities (2006)
- Lewis S. Rosenstiel Award for Distinguished Work in the Basic Medical Sciences, Brandeis University (2006)
- Elected a Foreign Member of the Royal Society (ForMemRS) in 2006
- BioPharma Leadership Award, the 6th Annual San Diego BioPharma Conference, San Diego (2007)
- US Department of Defense (DoD) Breast Cancer Innovator Award
- Nobel Prize in Chemistry, Sweden (2008)
- E.B. Wilson Medal, American Society for Cell Biology (2008)
- Honorary Fellow of the Royal Society of Chemistry (HonFRSC), UK (2008)
- Honorary Academician, Academia Sinica (2008)
- February 18, 2009, Roger Tsien Day, in the City of San Diego, California, USA
- Distinguished Science and Technology Award, The 2009 Asian American Engineers of the Year (AAEoY) Award (April 2009)
- Lifetime Innovation Award, UC San Diego (May 20, 2009)
- AHA Distinguished Scientists, American Heart Association (2009)
- Molecular Imaging Achievement Award, Society of Molecular Imaging (2009)
- Doctor of Science honoris causa, The University of Hong Kong (2009)
- Doctor of Science honoris causa, Chinese University of Hong Kong (2009)
- General President Gold Medal, the 97th Indian Science Congress, India (January 3, 2010)
- Spiers Memorial Award, Royal Society of Chemistry, UK (2010)
- Golden Goose Award (2012)
Named lectures and lectureships
- Bowditch Lectureship, American Physiological Society (1992)
- Hans L. Falk Memorial Lectureship, National Institute of Environmental Health Sciences (1993)
- Quastel Lectureship, Hebrew University of Jerusalem (1994)
- President's Lectureship, American Thoracic Society (1994)
- Roger Eckert Memorial Lecture, Göttingen Neurobiology Conference of the German Neuroscience Society (1995)
- Melvin Calvin Lectureship, UC Berkeley (1999)
- Herbert Sober Lectureship, American Society for Biochemistry and Molecular Biology (2000)
- Keith Porter Lecture, American Society for Cell Biology (2003)
- Konrad Bloch Lectureship, Harvard University (2003)
- Grass Foundation Lectureship, Society for Neuroscience (2004)
- The 1st Academia Sinica Lecturer (the highest honor of the academy), Dec 2009
- The 2010 National Lecturer of the Biophysical Society (the highest honor of the society)
- The 2011 UCL Prize Lecture in Clinical Science (University College, London)
- "Roger Y. Tsien, chemist shared Nobel for tool to research Alzheimer's, dies at 64". The Washington Post. August 31, 2016. Retrieved September 1, 2016.
- Tsien, Roger Y. (1998). "The Green Fluorescent Protein". Annual Review of Biochemistry. 67 (1): 509–544. doi:10.1146/annurev.biochem.67.1.509. PMID 9759496.
- Anon (2006). "Professor Roger Tsien ForMemRS". London: Royal Society. Archived from the original on November 17, 2015. One or more of the preceding sentences incorporates text from the royalsociety.org website where:
All text published under the heading 'Biography' on Fellow profile pages is available under Creative Commons Attribution 4.0 International License." --"Royal Society Terms, conditions and policies". Archived from the original on September 25, 2015. Retrieved March 9, 2016.CS1 maint: BOT: original-url status unknown (link)
- The Wolf Prize in Medicine in 2004 (detail)
- Anon (2016). "Roger Tsien EMBO Profile". people.embo.org. Heidelberg: European Molecular Biology Organization.
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- "2008 Nobel Prize in Chemistry Laureates" (Official web page). The Nobel Foundation. October 8, 2008. Retrieved October 8, 2008.
- Tsien Nobel Prize lecture
- Tsien, Roger Y. (2010). "The 2009 Lindau Nobel Laureate Meeting: Roger Y. Tsien, Chemistry 2008". Journal of Visualized Experiments (35). doi:10.3791/1575. ISSN 1940-087X. PMC 3152217. PMID 20072108.
- Roger Y. Tsien - Biographical
- Rudolf, Rüdiger; Mongillo, Marco; Rizzuto, Rosario; Pozzan, Tullio (2003). "Looking forward to seeing calcium" (PDF). Nature Reviews Molecular Cell Biology. 4 (7): 579–586. doi:10.1038/nrm1153. PMID 12838340. Retrieved September 1, 2016.
- Nicole Kresge, Robert D. Simoni, and Robert L. Hill. "The Chemistry of Fluorescent Indicators: the Work of Roger Y. Tsien", Journal of Biological Chemistry, September 15, 2006. Accessed September 18, 2007. "At age 16, Tsien won first prize in the nationwide Westinghouse talent search with a project investigating how metals bind to thiocyanate."
- Swayze, Bill. "Jersey teens call science a winner: Two finalists say just being in Westinghouse talent competition is prize enough", The Star-Ledger, March 11, 1997. Accessed September 18, 2007. "Only one New Jersey teenager has ever captured top honors in the history of the competition. That was Roger Tsien in 1968. The then-16-year-old Livingston High School math-science whiz explored the way subatomic particles act as bridges between two dissimilar metal atoms in various complex molecules."
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- Rink, Timothy J.; Tsien, Louis Y.; Tsien, Richard W. (October 13, 2016). "Roger Yonchien Tsien (1952–2016)". Nature. 538 (172): 172. Bibcode:2016Natur.538..172R. doi:10.1038/538172a. ISSN 0028-0836. PMC 5960232. PMID 27734865.
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- Nobel lecture
- Shaner N, Steinbach P, Tsien R (2005). "A guide to choosing fluorescent proteins" (PDF). Nat Methods. 2 (12): 905–9. doi:10.1038/nmeth819. PMID 16299475.
- Heim R, Cubitt A, Tsien R (1995). "Improved green fluorescence" (PDF). Nature. 373 (6516): 663–4. Bibcode:1995Natur.373..663H. doi:10.1038/373663b0. PMID 7854443.
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- Xiaokun Shu; Antoine Royant; Michael Z. Lin; Todd A. Aguilera; Varda Lev-Ram; Paul A. Steinbach; Roger Y. Tsien (2009). "Mammalian Expression of Infrared Fluorescent Proteins Engineered from a Bacterial Phytochrome". Science. 324 (5928): 804–07. Bibcode:2009Sci...324..804S. doi:10.1126/science.1168683. PMC 2763207. PMID 19423828.
- Rodriguez, Erik A.; Tran, Geraldine N.; Gross, Larry A.; Crisp, Jessica L.; Shu, Xiaokun; Lin, John Y.; Tsien, Roger Y. (August 1, 2016). "A far-red fluorescent protein evolved from a cyanobacterial phycobiliprotein". Nature Methods. 13 (9): 763–9. doi:10.1038/nmeth.3935. ISSN 1548-7105. PMC 5007177. PMID 27479328.
- Tsien, Roger Y. (January 1, 1998). "The Green Fluorescent Protein". Annual Review of Biochemistry. 67 (1): 509–544. doi:10.1146/annurev.biochem.67.1.509. PMID 9759496.
- "Fluorescent Indicators for Zn2+ and Other Metal Ions—Section 19.7 - US".
- Miyawaki A, Llopis J, Heim R, McCaffery JM, Adams JA, Ikurak M, Tsien RY (1997). "Fluorescent indicators for Ca2+ based on green fluorescent proteins and calmodulin". Nature. 388 (6645): 882–7. doi:10.1038/42264. PMID 9278050.
- B. Albert Griffin; Stephen R. Adams; Roger Y. Tsien (1998). "Specific Covalent Labeling of Recombinant Protein Molecules Inside Live Cells". Science. 281 (5374): 269–72. Bibcode:1998Sci...281..269G. doi:10.1126/science.281.5374.269. PMID 9657724.
- "PNAS: Fluorescence + MR imaging probe can guide cancer surgery" (php). PNAS. March 4, 2010. Retrieved March 11, 2010.
- Interview, Roger Tsien. The light fantastic, pages 7-9 in The Biologist, Biochemistry Supplement. Vol 62 No 5 supplement. Oct/Nov 2015
- San Diego Science Festival Lunch with a Laureate
- 诺贝尔化学奖得主钱永健系吴越国王34世孙 [Nobel Chemistry Prize winner Roger Tsien is the 34th-generational descendant of the King of Wuyue] (in Chinese). Sina.com. October 9, 2008. Retrieved October 9, 2008.
- Ruth Williams; Horsfall, MJ; Van Helten, JB; Glickman, BW; Mohn, GR (October 8, 2007). "People & Ideas – Roger Tsien: Bringing color to cell biology". J Cell Biol. 179 (1): 6–8. doi:10.1083/jcb.1791pi. PMC 2064723. PMID 17923526.
- Ma, Huan; Li, Boxing; Tsien, Richard W. (2015). "Distinct roles of multiple isoforms of CaMKII in signaling to the nucleus". Biochimica et Biophysica Acta (BBA) - Molecular Cell Research. 1853 (9): 1953–1957. doi:10.1016/j.bbamcr.2015.02.008. ISSN 0167-4889. PMC 4522395. PMID 25700840.
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- Media related to Roger Tsien at Wikimedia Commons