Biochemistry, Genetics and Molecular Biology
8 years ago

New research reveals how sunlight damages crucial part of photosynthesis process

Coordination Chemistry Reviews
Photoinhibition of Photosystem II and photodamage of the oxygen evolving manganese cluster
Esa Tyystjärvi

Paper Summary

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Light can both help and harm photosynthesis. When light damages the Photosystem II, it's called photoinhibition. This damage is fixed by replacing the D1 protein. Visible and ultraviolet light can both harm Photosystem II, but ultraviolet light is more damaging. Scientists are studying how light affects the oxygen-evolving complex, focusing on the manganese cluster. They found that the manganese cluster's light absorption is crucial for photoinhibition. This can lead to the production of singlet oxygen in damaged Photosystem II centers.