Manganese and tyrosyl radical function in photosynthetic oxygen evolution

✍ Scribed by Cecilia Tommos; Curtis W Hoganson; Marilena Di Valentin; Nikos Lydakis-Simantiris; Pierre Dorlet; Kristi Westphal; Hsiu-An Chu; John McCracken; Gerald T Babcock

• Book ID: 104415053
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 824 KB
• Volume: 2
• Category: Article
• ISSN: 1367-5931
• DOI: 10.1016/s1367-5931(98)80066-5

✦ Synopsis

Photosystem II catalyzes the photosynthetic oxidation of water to O2. The structural and functional basis for this remarkable process is emerging. The catalytic site contains a tetramanganese cluster, calcium, chloride and a redox-active tyrosine organized so as to promote electroneutral hydrogen atom abstraction from manganese-bound substrate water by the tyrosyl radical. Recent work is assessed within the framework of this model for the water oxidizing process.