The trigger for photosynthesis

Published: 12 December 2003

University of Glasgow research published in Science

Professor Richard Cogdell (Division of Biochemistry and Molecular Biology) and Professor Neil Isaacs (Department of Chemistry) will see their research findings into photosynthesis published this week (12 December) in the prestigious American Journal, Science

Photosynthesis is arguably one of the most fundamental biological processes on earth. As Professor Cogdell explains, " It represents the only input of energy for earth and provides both all the oxygen we breathe and all of the food we eat ヨ so it's pretty significant."

The crystal structure of a membrane protein that effectively represents the 'heart' of bacterial photosynthesis has been studied by them and their international colleagues and has revealed a light harvesting capability which surrounds this reaction core.

Light energy is absorbed by an antenna complex and is transferred to the reaction core. It then uses this harvested solar energy to power its electron transfer ヨ this element being the very beginning of the photosynthesis process.

In addition, the Professors have identified a 'portal' in the antenna that allows an electron transfer component called ubiquinone to leave the confines of the reaction centre and make its way down the electron transport pathway.

Professor Isaacs explains, "By understanding better this unique structure, we can in turn develop a greater understanding of the mechanisms of these early reactions of photosynthesis which are so vital to us and our natural world."

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First published: 12 December 2003