title: Ammonia displaces methanol bound to the water oxidizing complex of photosystem II in the S2 state.
abstract: Ammonia and methanol both bind to the water oxidising complex of photosystem II during its turnover, possibly at sites where water binds during the normal water oxidation process. We have investigated the interaction between these two water analogues at the S2 state of the water oxidising cycle using electron magnetic resonance techniques. We find evidence that ammonia displaces methanol from its binding site.
authors.affiliation: Department of Biology, Darwin Building, University College London, Gower Street, London WC1E 6BT, UK. mike.evans@ucl.ac.uk
authors.forename: Michael C W
authors.initials: MC
authors.lastname: Evans
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Ball
authors.forename: Jonathan H A
authors.initials: JH
authors.lastname: Nugent
mesh_terms: D000641:Ammonia / Q000494:pharmacology*; D009682:Magnetic Resonance Spectroscopy; D000432:Methanol / Q000037:antagonists & inhibitors* / Q000378:metabolism*; D010084:Oxidation-Reduction; D018532:Pisum sativum / Q000201:enzymology / Q000378:metabolism*; D045332:Photosystem II Protein Complex / Q000737:chemistry* / Q000378:metabolism*; D011485:Protein Binding / Q000187:drug effects; D036226:Seedlings / Q000201:enzymology / Q000378:metabolism; D013055:Spectrophotometry, Infrared; D014867:Water / Q000737:chemistry / Q000378:metabolism*
chemical_list: D045332:Photosystem II Protein Complex; D014867:Water; D000641:Ammonia; D000432:Methanol