Biological water-oxidizing complex: A nano-sized manganese-calcium oxide in a protein environment

Mohammad Mahdi Najafpour, Atefeh Nemati Moghaddam, Young Nam Yang, Eva Mari Aro, Robert Carpentier, Julian J. Eaton-Rye, Choon Hwan Lee, Suleyman I. Allakhverdiev

Research output: Contribution to journalReview articlepeer-review

40 Citations (Scopus)


The resolution of Photosystem II (PS II) crystals has been improved using isolated PS II from the thermophilic cyanobacterium Thermosynechococcus vulcanus. The new 1.9 Å resolution data have provided detailed information on the structure of the water-oxidizing complex (Umena et al. Nature 473: 55-61, 2011). The atomic level structure of the manganese-calcium cluster is important for understanding the mechanism of water oxidation and to design an efficient catalyst for water oxidation in artificial photosynthetic systems. Here, we have briefly reviewed our knowledge of the structure and function of the cluster.

Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalPhotosynthesis research
Issue number1
Publication statusPublished - Oct 2012
Externally publishedYes


  • Artificial photosynthesis
  • Nano-sized manganese-calcium cluster
  • Oxygen
  • Photosystem II
  • Water
  • Water-oxidizing complex

ASJC Scopus subject areas

  • Biochemistry
  • Plant Science
  • Cell Biology


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