ESEEM spectroscopy reveals carbonate and an N-donor protein-ligand binding to Mn2+ in the photoassembly reaction of the Mn4Ca cluster in photosystem II

Jyotishman Dasgupta, Alexei M. Tyryshkin, G. Charles Dismukes

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(Chemical Equation Presented) In the WOC: The structural role of bicarbonate in the assembly of the Mn4Ca cluster of the water oxidizing complex (WOC) in photosystem II (PSII) is revealed by electron spin echo envelope modulation (ESEEM) spectroscopy. The results clearly indicate the presence of C (from a labeled carbonate) and N (from histidine or lysine residue) in the inner coordination sphere of the Mn2+ assembly intermediate.

Original languageEnglish
Pages (from-to)8028-8031
Number of pages4
JournalAngewandte Chemie - International Edition
Issue number42
Publication statusPublished - Nov 7 2007



  • Bicarbonate
  • Manganese
  • Photoactivation
  • Photosystem II
  • Spin echo spectroscopy

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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