西亚试剂：A Red-Shifted Chlorophyll

A Red-Shifted Chlorophyll
Min Chen,1,* Martin Schliep,1 Robert D. Willows,2 Zheng-Li Cai,3 Brett A. Neilan,4 Hugo Scheer1,5

Chlorophylls are essential for light-harvesting and energy transduction in photosynthesis. Four chemically distinct varieties have been known for the past 60 years. Here, we report isolation of a fifth, which we designate chlorophyll f. Its in vitro absorption (706 nm) and fluorescence (722 nm) maxima are red-shifted compared to all other chlorophylls from oxygenic phototrophs. Based on the optical, mass, and nuclear magnetic resonance spectra, we propose that chlorophyll f is [2-formyl]-chlorophyll a (C55H70O6N4Mg). This finding suggests that oxygenic photosynthesis can be extended further into the infrared region and may open associated bioenergy applications.

1 School of Biological Sciences, University of Sydney, NSW 2006, Australia.
2 Department of Chemistry and Biomolecular Sciences, Macquarie University, NSW 2109, Australia.
3 School of Chemistry, University of Sydney, NSW 2006, Australia.
4 School of Biotechnology and Biomolecular Science, University of New South Wales, NSW 2052, Australia.
5 Department of Biology I, University of Munich, D-80638 Muenchen, Germany.

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