Abstract
The vast structural and functional information database of photosynthetic enzymes includes, in addition to detailed kinetic records from decades of research on physical processes and chemical reaction-pathways, a variety of high and medium resolution crystal structures of key photosynthetic enzymes. Here, it is examined from an engineer’s point of view with the long-term goal of reproducing the key features of natural photosystems in novel biological and non-biological solar-energy conversion systems. This survey reveals that the basic physics of the transfer processes, namely, the time constraints imposed by the rates of incoming photon flux and the various decay processes allow for a large degree of tolerance in the engineering parameters. Furthermore, the requirements to guarantee energy and electron transfer rates that yield high efficiency in natural photosystems are largely met by control of distance between chromophores and redox cofactors. This underlines a critical challenge for projected de novo designed constructions, that is, the control of spatial organization of cofactor molecules within dense array of different cofactors, some well within 1 nm from each other.
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The author acknowledges a career development award by the human frontiers science program organization.
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Noy, D. Natural photosystems from an engineer’s perspective: length, time, and energy scales of charge and energy transfer. Photosynth Res 95, 23–35 (2008). https://doi.org/10.1007/s11120-007-9269-7
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DOI: https://doi.org/10.1007/s11120-007-9269-7