A tribute to Seymour Steven Brody: in memoriam (November 29, 1927 to May 25, 2010)
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We honor Steve Brody, a dear friend and a mentor on what would have been his 83rd birthday (November 29, 2010). Steve was a pioneer of chlorophyll structure and function, an outstanding biophysicist, an innovator, an artist and an adventurer, a true renaissance man. We present here first his first-of-a-kind contributions on the primary processes of photosynthesis at the University of Illinois at Urbana-Champaign, and then review his research on the interactions of chlorophyll monolayers and various photosynthetic electron donors and acceptors in artificial membrane systems at New York University. We highlight significant research contributions of interest to the reader and conclude with biographical notes.
KeywordsChlorophyll Excitation energy transfer Fluorescence Lifetime of fluorescence Monolayers Photosynthesis Fluorescence of heme-proteins Molecular modeling
A pioneer of chlorophyll structure and its role in photosynthesis has passed on. Seymour Steven Brody was a biophysicist, an innovator, a great teacher and mentor, as well as an artist, a pilot, a flight instructor, an adventurer (demonstrated by his transcontinental and trans-Atlantic flights in a small propeller plane), a first-degree black-belt and the higher second degree in karate, and a first-degree black-belt in Tae Kwando. Steve Brody was a true Renaissance man.
Steve Brody’s research contributions were cutting edge. As part of his doctoral research under the mentorship of Eugene Rabinowich, Steve Brody designed an instrument to directly measure fluorescence lifetimes on the nanosecond scale. In a seminal research published in his doctoral thesis and in Science, he reported the first in vivo measurements of chlorophyll fluorescence lifetimes, and the time it takes to transfer energy from phycoerythrin to chlorophyll a (Brody 1956; Brody and Rabinowitch 1957). This was soon followed by another first: the discovery of a new fluorescence band at 720 nm, suggested to be from a “chlorophyll dimer” (Brody 1958). Steve continued to produce influential papers on chlorophyll and in collaboration with Marcia Brody for more than a decade (1959–1971). Novel approaches to define the long wavelength chlorophyll species were pursued by his postdoctoral fellows and doctoral students at New York University. We continue this tribute in the voice of Govindjee (GO, as Steve had called him) and his former students, Rhoda Elison Hirsch (REH) and Marvin Rich (MR).
Contributions at Urbana, Illinois
Steve Brody was my senior when, in September 1956, I (GO) joined the world famous Emerson-Rabinowitch laboratory of photosynthesis, at the University of Illinois at Urbana-Champaign, located in the basement of the Natural History Building on Matthews Avenue in Urbana, Illinois. It was the Mecca of research on the “Light Reactions of Photosynthesis”, whereas the University of California at Berkeley was the other equally renowned laboratory that focused on studying how CO2 makes sugars, where they had Melvin Calvin (who later received a Nobel Prize in Chemistry) and Andrew A. Benson (see Govindjee 2010, for a tribute). Urbana was where the Nobel laureate Otto Warburg had visited and where he and his former doctoral student Robert (Bob) Emerson could not agree on the minimum quantum (photon) requirement for the evolution of one molecule of oxygen in oxygenic photosynthesis. Emerson was proven right for his 8–12 photons over Warburg’s 3–4 photons per O2 molecule. The laboratory at Urbana was buzzing with research activity all day and until late hours in the evening—sometimes to midnight. Emerson’s laboratory used the most sophisticated manometers that measured pressure changes better than anybody else’s in the world. Rabinowith’s laboratory used state-of-the art absorption spectroscopy and fluorometry. (For descriptions of the two professors and the laboratory, see Bannister 1972; Brody 1995; Ghosh 2004; Govindjee 2004.) I was a beginning Ph.D. student of Emerson, whereas Steve Brody was already an established and accomplished student in Rabinowitch’s group. There were others, but I was most impressed by Steve and his contributions. I shall just give a glimpse of some of Steve’s discoveries made at the University of Illinois at Urbana-Champaign, some of which were already introduced above.
Steve was independent, ingenious, and very clever in getting things done. He had no fear of anything and no hesitation in delving into totally unfamiliar territory. Of course, everything was possible because Rabinowitch gave total independence to his students and postdocs, and Steve thrived on this freedom. Steve was the one to make the first direct measurement on the decay of chlorophyll fluorescence in vivo in the nanosecond time scale (see his own account in Brody 2002). No one had attempted such measurements in the field of photosynthesis. There was no equipment to even attempt to carry out such measurements. And Steve went right ahead and built the very first fluorescence lifetime instrument by sheer ingenuity, perseverance, and dedication. How did he do it? First of all, he designed and constructed a totally new instrument from scratch (Brody 1957); he exploited a new light source, a low pressure hydrogen lamp, with a flash duration of 2 ns, which was being developed at the University of Illinois at Urbana-Champaign, by Malmberg (1957). Steve needed to use a special oscilloscope to achieve his goal; this was only available at the cyclotron lab at Urbana, Illinois, and that too only at nighttime. Steve did not hesitate to work from midnight until 8 in the morning every day during that period. There, he worked all night for almost 6 months. His adventurous spirit and his dedicated work paid off. Steve made the first direct measurements of the lifetime of fluorescence not only from chlorophyll in solution, but from chlorophyll a in suspensions of the red alga Porphyridium, the green alga Chlorella, and the cyanobacterium Anacystis (Brody 1956, 1957; Brody and Rabinowitch 1957; Rabinowitch and Brody 1958). It is important to mention that independent of Brody’s work at Urbana, Illinois, Alexander Terenin’s famous laboratory at Leningrad University had also built an instrument, that had used a different method, the so-called phase method, and there, Dmitrievsky et al. (1957) also measured the chlorophyll a fluorescence lifetime in vivo (see Borisov 2003). The lifetime of chlorophyll a fluorescence was found to be in the range of 1 to 1.5 ns in photosynthetic systems, and this was almost 4–5 times shorter than for chlorophyll a in solutions. Both research groups at Urbana and in Leningrad (St. Petersburg) concluded that the primary reaction of photosynthesis must be through the singlet-excited state of chlorophyll. Later my research group, and that of many others, have extended these lifetimes of fluorescence measurements; see an early review by Jursinic and Govindjee (1979).
Another first in the field of photosynthesis was then the measurement of the time (and thus, the rate) of excitation energy transfer from the orange-red pigment phycoerythrin to chlorophyll a in the red alga Porphyridium cruentum (see Brody 1958, 1960; Rabinowitch and Brody 1958; Brody and Rabinowitch 1959). When excited by green light, absorbed by phycoerythrin, the measured time for energy transfer was ~0.5 ns. Much has progressed since then, but this measurement remains the first in the field. (For excitation energy transfer, see e.g., Clegg et al. 2010; Dutton 1997; Duysens 1952; French and Young 1952; Porter et al. 1978.)
As mentioned in the Introduction, Steve made still another discovery by using 77 K (liquid nitrogen temperature) spectroscopy after thinking about the obvious—that at low temperature biochemistry stops. Brody (1958) discovered a brand new emission band at 720 nm (F720). Steve had thought then that it was from a “chlorophyll dimer” (perhaps, the reaction center of Photosystem I, what is called P700); it is now known to originate from antenna chlorophyll a complex in Photosystem I. At 77 K, another band at 696 nm (F696) was discovered independently in 1963 in several laboratories (including my (G) own and that of Steve Brody) (see reviews in: Govindjee et al. 1986; Govindjee 1995; Papageorgiou and Govindjee 2004). This 696 nm band is now assigned to originate in chlorophyll–protein complex (CP-47) in Photosystem II.
George Papageorgiou recently wrote to Govindjee about another interesting topic (photodynamic action of hypericin on cyanobacteria) on which he and Steve had worked together at Demokritos, Greece in the 1990s (see Papageorgiou et al. 1996; Brody et al. 1997). George remarked that during a short visit to his lab, Steve had impressed all his collaborators, and added “Steve was a great scientist, a great guy, a great human being of our times.”
Govindjee ends this short snippet of Steve by mentioning that Steve was a very friendly person; he was the only one to call me “Go”, first 2 letters of my name. When I spoke in Hindi on the telephone with my family and friends, he picked up one word “Accha”; it implies “OK” or “good”. In good humor, he would often use it in conversation with me. After receiving his PhD, and after only one semester of lessons from the School of Aviation, at the University of Illinois at Urbana, he obtained his private pilot license. He would rent one of the University airplanes and fly members of the Emerson-Rabinowitch Lab (as he would put it “those who would dare”) to conferences. Jean Lavorel recently wrote, “I vividly remember that in February, 1957, we had all gone in an airplane piloted by Steve to Columbus (Ohio) to participate in a Biophysical Society meeting there. It was a fascinating experience”. However, neither Rabinowitch, nor Emerson ever flew with him. I was too scared to fly with him although I did take a short ride once.
Joint Research with Marcia Brody
Marcia Brody was a former PhD student of Robert Emerson, and was also senior to me; she is currently Professor Emeritus of Hunter College, New York. Marcia is an accomplished scientist and had made major discoveries in the area of two-light effect and two photosystems in the red alga Porphyridium cruentum (see e.g., M. Brody and Emerson 1959a, b). Historically, it is important to point out that Marcia was a coauthor of an early abstract of a presentation by Robert Emerson (Emerson et al. 1956) that had some of the first hints on what led to the concepts of the two-light effect and two pigment systems of photosynthesis, based on the Emerson Enhancement Effect (Emerson et al. 1957; Rabinowitch and Govindjee 1960; R. Govindjee et al. 1960. (Both Govindjee and Rajni Govindjee were students of Emerson, but became students of Rabinowitch after Emerson died in a plane crash on Feb. 4, 1959.) Steve Brody collaborated with Marcia (see Biographical Portrait below) extensively since 1959 for a little more than 10 years. We mention only a few of their collaborative studies here. This collaboration included studies on dynamic changes in the efficiency of excitation energy transfer (Brody and Brody 1959; M. Brody and Brody 1961); and measurements on the optical properties and possible roles of aggregated forms of chlorophylls in vivo as well as in vitro (see e.g., Brody and Brody 1961). In particular, the idea that the reaction center of Photosystem I “P700” is an aggregated form of chlorophyll was emphasized by the two (Brody and Brody 1965). M. Brody and Brody (1962) provided an excellent review of the field of “Light Reactions in Photosynthesis”; this remains an important educational contribution. The two also initiated studies on fluorescence properties of Euglena during chlorophyll formation (Brody et al. 1965); and studied the effects of linolenic acid, among many things, on the two photosystems (Brody 1970; Brody et al. 1970). After almost a decade, the mechanism of linolenic acid inhibition on photosynthetic electron transport was rediscovered and subsequently, exploited to study partial reactions of the photosystems (see e.g., Golbeck et al. 1980; Warden and Csatorday 1987).
Contributions at New York University
From 1969 to 1992, Steve Brody’s research efforts took a new perspective by exploring the interactions of chlorophyll monolayers and various photosynthetic electron donors and acceptors in artificial membrane systems, and also extended this approach to retinals and rhodopsin. Steve continued to design prototype biophysical instruments to spectrally characterize chlorophyll and proteins in monolayers.
As a doctoral candidate at New York University (NYU), I was fortunate to have Steve as my professor and mentor (1974–1977). He was always available for discussion and dealt with all issues in an even, soft-toned manner. He created the curricula and taught two excellent upper-level graduate courses, “Photobiology” and “Instrumentation in Biology”. Students enrolled in the later course scurried about his blacked-out laboratory, set atop the roof of NYU’s Main Building, learning to use these instruments, helping to modify them, and acquiring data. My doctoral studies focused on direct spectral measurements of pure chlorophyll monolayers at a nitrogen–water interface in the presence and absence of redox compounds. Increasing surface tension gave rise to longer wavelength species. We concluded that in the monolayer, compression gives rise to various chlorophyll aggregated species (Hirsch and Brody 1979). The amount and specific chlorophyll species could be further induced by compression in the presence of reducing or oxidizing agents, with implications of chlorophyll orientation and complexation (Hirsch and Brody 1978, 1979, 1980).
After graduating in 1977, I began a Postdoctoral Fellowship in the Division of Hematology, Department of Medicine at the Albert Einstein College of Medicine. A few days a week, I returned to Steve’s lab at NYU to collaborate, using the instrument that provided data for my doctoral dissertation. Steve collaborated with me, and my Einstein colleagues, on a project comparing the properties of monolayers of sickle cell hemoglobin (HbS) and normal hemoglobin at an air–water interface. Direct spectral measurements at this interface demonstrated that HbS unfolds to a significantly larger extent than HbA at the interface (Hirsch et al. 1980a). This conclusion provided one possible mechanism to explain established findings by others that HbS binds with greater affinity to the red blood cell membrane than does HbA, with the implication of a conformational difference.
Steve was a resource. At the Einstein College of Medicine in 1977, with the aim of following resonance energy transfer in hemoglobin, I observed a weak hemoglobin fluorescence signal that I found to be detectable with a small cylindrical cuvette using right-angle optics in a standard fluorometer. I phoned Steve, asking how can one amplify a weak fluorescence signal? He provided me with critical information to try front-face fluorometry. His suggestion enabled me to break the dogma that heme-proteins do not emit significant fluorescence, establishing the use of front-face fluorescence to detect the fluorescence of hemoglobin and heme-proteins. By comparing the fluorescence of hemoglobin mutants, we concluded that the primary source of hemoglobin fluorescence is from β37 Trp (located at the α1β2 interface, in the oxy to deoxy quaternary structural transition (Hirsch et al. 1980b; Hirsch and Nagel 1981). (For a review of hemoglobin fluorescence, see Hirsch 1994, 2000, 2003.)
Over the years, Steve and I remained in contact. Although Steve officially retired in 1997 from NYU, he already relocated, in 1995, to Denmark with Lis Stelzig, his wife, and their daughter Stephanie. In Denmark, Steve joined the Carlsberg Research Laboratories as a Visiting Professor (1997–2001). Victor Brody was born in 1996. I would see Steve, Lis and all of his children during their visits to New York, or when my husband, son and I were able to visit abroad with them. Steve, Lis, and his family became our close family friends. He was always there to listen and to share fun times, all in his easy, positive, and optimistic way. Thus, it is an honor and privilege to be asked to coordinate and co-author this tribute.
Steve often spent his summers working in labs overseas. Several of these experiences developed into interesting projects during the school year. On one visit Steve became interested in the effects of pressure on the spectra of phycobiliproteins (Brody and Stelzig 1983). This led to a lab effort to study the effects of elevated pressure on the permeability of adriamycin between neoplastic and normal lung cells (Brody et al. 1987).
On another trip Steve visited the laboratory of Jean-Jacques Legendre at the Laboratoire d’Electrochimie et de Chimie Analytique in Paris. At the time, Jean-Jacques was using computational modeling to study small molecule systems. Jean-Jacques introduced Steve to several molecular modeling software packages. For both Steve and myself, this opened a door to a field of research that could virtually be done anywhere if there was access to a computer terminal. Steve directed his interest to predicting protein structure using homology software at the Department of Physiology, Carlsberg Research Center in Copenhagen. The predicted structure and fold recognition for the ferrochelatase protein (Hanson et al. 1997) and for the glutamyl tRNA protein (Brody et al. 1999) are deposited in the Brookhaven Database as ID1FJI and ID1b61, respectively. Since I was still teaching in the New York City school system, I decided to develop several activities that would introduce the world of Molecular Modeling to K-12 students. The project was developed at the NYU Scientific Visualization Center at the same time the Internet was just emerging and allowed for rapid dissemination of the project to the K-12 community. The site called MathMol: Mathematics and Molecules (http://www.nyu.edu/pages/mathmol/) continues to be actively used by many High School and College students. The aim of the site is to provide students and teachers basic concepts in mathematics and their connection to the world of molecules.
Steve was not only my (MR) mentor but also a great personal friend. I often traveled to Europe to visit him and I remain a friend of his family to this day.
Seymour Steven Brody was born in the Bronx in New York City. He wrote that he “always wanted to be a pilot, so for high school I elected to go to an ‘aviation school’, Haaren High School in Manhattan where I excelled in mathematics and science.” He was a maverick, even as a youth. His autobiographical notes state:
“Ran off to join Navy (at age 15 or 16). My parents found out I joined the Navy, from another friend of mine. I had a cousin who was a captain in the Navy… (who) located me in the Navy training base in upstate New York. After several months they gave me an honorable discharge, as an underage minor [US Navy, May 23, 1944 until June 21, 1944 (20 days)]”. Steve was then drafted into the US Army (Feb. 25, 1946 to August 29, 1946); and re-enlisted on August 30, 1946 and served until August 16, 1947. “After the Army, I went back to night school (Evander Childs) to complete my high school education, so I could apply to college. I did perfect in algebra and geometry.”
For a complete list of almost 94 publications by Seymour Steven Brody, search Brody SS in PubMed or other literature data bases. However, to give the readers a breadth of Steve’s research and his association with other scientists, we provide here a list of selected references, arranged chronologically (See Appendix).
“So I just want to say, I have had a fantastic wonderful, fun filled life with lots of adventures and no regrets. I thank you all for being part of it. It has been wonderful to know you.”
On May 25, 2010, Steve Brody passed away at the age of 82. He is survived by his wife Lisbeth Stelzig and their children Stephanie and Victor; his first wife, Marcia Brody and their children: Stuart Brody, Benjamin (Ben) Brody, Erica Brody and son-in-law, Richard Haw; and his niece, Florence Fisher, her husband, Stan Fisher and their family. During the last days of his life, Steve was looking forward to the November 2010 arrival of his first grandchild (parents: Erica Brody and Richard Haw).
We are very grateful to Lis Stelzig for providing us with Steve’s curriculum vitae, biographical details, and photos. We appreciate her kind support in finishing this tribute. The authors also thank Benjamin Brody, Erica Brody, Stephanie Brody, and Victor Brody for their encouragement and input. We thank Jean Lavorel, George Papageorgiou, Norio Murata and Prasanna Mohanty for their wonderful comments on Steve and on his research in the area of photosynthesis. We are also grateful to Jean-Jacques Legendre for his cordial personal remarks on their friendship and association. The authors appreciate the support of Marcia Brody and Suse Broyde for this Tribute. Govindjee is thankful to the offices of Plant Biology and of Information Technology (Life Sciences) at the University of Illinois at Urbana-Champaign. Rhoda Elison Hirsch acknowledges with appreciation the American Heart Association for their support in part (Grant-in-Aid No. 0755906T).
- Brody M, Brody SS (1962) Photosynthesis—light reactions. In: Lewin R (ed) The physiology and biochemistry of the algae. Academic Press, New York, pp 3–23Google Scholar
- Brody SS (1956) Fluorescence lifetimes of photosynthetic pigments in vivo and in vitro. PhD thesis, University of Illinois at Urbana—Champaign (Dissertation Abstracts 17: 484–485, 1957)Google Scholar
- Brody SS (1960) Delay in intermolecular and intramolecular energy transfer and life times of photosynthetic pigments. Z Elektrochem 64:187–203Google Scholar
- Brody S (1970) The effects of linolenic acid and extracts of Ricinus leaf on system I and system II. Z Naturforschung 25:855–859Google Scholar
- Brody SS, Rabinowitch E (1959) Energy transfer and photosynthesis. First National Biophysics Conference, Yale University Press, pp 110–121Google Scholar
- Brody SS, Stelzig L (1983) Effect of pressure on the absorption spectra of phycobiliprotein and Porphyridium cruentum. Z Naturforsch 38c:458–460Google Scholar
- Brody SS, Brody M, Döring G (1970) Effects of linolenic acid on system II and system I—associated light induced changes in absorption of chloroplasts. Zeit f Naturforschgung 25b:367–372Google Scholar
- Brody SS, Stelzig L, Ferraro G, Rich M (1987) Use of elevated pressure to promote the difference in permeability of adriamycin (C) and hematoporphyrin between neoplastic and normal lung cells. Cancer Biochem Biophys 9:l33–l38Google Scholar
- Brody SS, Papageorgiou G, Alygizaki-Zorba A (1997) Photodynamic action of hypericin on cyanobacteria Synechocystis and Synechococcus (Anacystis nidulans). Z Naturforsch 52c:165–168Google Scholar
- Clegg RM, Sener M, Govindjee (2010) From Förster Resonance Energy Transfer (FRET) to Coherent Resonance Energy Transfer (CRET) and Back—Awheen o’ mickles mak’s a muckle. In: Alfano RR (ed) Optical biopsy VII, Proceedings of SPIE, Vol. 7561 (SPIE, Bellingham, WA, 2010), paper number: 7561-12; article CID number: 75610C, 21 ppGoogle Scholar
- Dmitrievsky OD, Ermolaev VL, Terenin AN (1957) The fluorescence lifetime of chlorophyll a in Chlorella cells. Proc USSR Acad Sci 114:75–78Google Scholar
- Duysens LNM (1952) Transfer of excitation energy in photosynthesis. Doctoral Thesis, State University, Utrecht, The NetherlandsGoogle Scholar
- Emerson R, Chalmers R, Cederstrand C, Brody M (1956) Effect of temperature on the long-wave limit of photosynthesis. Science 123:673Google Scholar
- Govindjee (2004) Robert Emerson, and Eugene Rabinowitch: understanding photosynthesis. In: Hoddeson L (ed) No Boundaries: University of Illinois Vignettes, Chap. 12. University of Illinois Press, Urbana and Chicago, pp. 181–194. ISBN: 0-252-0703-0 (paperback)Google Scholar
- Govindjee (2010) Celebrating Andrew Alm Benson’s 93rd birthday. Photosynth Res. doi: 10.1007/s11120-010-9591-3
- Govindjee, Amesz J, Fork DC (eds) (1986) Light emission by plants and bacteria. Academic Press, Orlando, FloridaGoogle Scholar
- Hirsch RE (2000) Heme protein fluorescence. In: Lakowicz JR (ed) Topics in fluorescence spectroscopy, Chap 10, vol 6: protein fluorescence. Kluwer Academic/Plenum Publishers, New York, pp. 221–255Google Scholar
- Hirsch RE (2003) Hemoglobin fluorescence. In: Nagel RL (ed) Methods in hemoglobin disorders. Series in molecular medicine. Humana Press, New Jersey, pp 133–154Google Scholar
- Hirsch RE, Brody SS (1980) Absorption spectra of mixed monomolecular films of chlorophyll and photosynthetic electron carriers at a gas–water interface. Arch Biochem Biophys l99:506–5l4Google Scholar
- Hirsch RE, Nagel RL (1981) Conformational studies of hemoglobins using intrinsic fluorescence measurements. J Biol Chem 256:l080–l083Google Scholar
- Jursinic P, Govindjee (1979) Photosynthesis and fast changes in light emission by green plants. Photochem Photobiol Rev 4:125–205Google Scholar
- Papageorgiou GC, Govindjee (eds) (2004) Chlorophyll a fluorecence: a signature of photosynthesis. Springer, Dordrecht (reprinted in 2010 in softcover)Google Scholar
- Rabinowitch E, Brody SS (1958) Transferts d’energie et photosynthése. J Chim Phys 55:925–933Google Scholar
- Rich M, DeStrulle R, Ferrara G, Brody SS (1992) Dihydroxy-carotenoids inhibit phtotoxicity in Paramecium caudatum. Photochem Photobio 26:413–418Google Scholar