title: Molecular operation of metals into the function and state of photosystem II.
abstract: Action sites of different metals in the electron transport reactions of Photosystem II (PS II) evaluated by delayed fluorescence in the ms range (ms DF) and pigment-pigment, pigment-protein and protein-protein interaction states by electrophoretic measurements are presented. The main targets for the metals action were shown to be:(i) Cd(2+), Ni(2+), Co(2+)-Y(z) or CaMn(4)-cluster on the donor site with dependence on pH;(ii) Ni(2+), Co(2+), Zn(2+), Al(3+), Mn(2+) between Q(A) and Q(B) on the acceptor site; effect of Al(3+) and Mn(2+) is observed only in acidic pH. Investigated metals bring about monomerization of oligomeric and dimeric chlorophyll-protein complexes (CPC) and destabilization of protein-protein interactions. Molecular mechanisms of metals interference with the structure of PS II are discussed.
authors.affiliation: State Agrar University, Ganja, Azerbaijan.
authors.forename: Arif
authors.initials: A
authors.lastname: Gaziyev
authors.forename: Samira
authors.initials: S
authors.lastname: Aliyeva
authors.forename: Inna
authors.initials: I
authors.lastname: Kurbanova
authors.forename: Rena
authors.initials: R
authors.lastname: Ganiyeva
authors.forename: Sona
authors.initials: S
authors.lastname: Bayramova
authors.forename: Ralphreed
authors.initials: R
authors.lastname: Gasanov
mesh_terms: D002736:Chloroplasts / Q000378:metabolism; D004579:Electron Transport; D005453:Fluorescence; D008670:Metals / Q000378:metabolism*; D045332:Photosystem II Protein Complex / Q000378:metabolism*; D018515:Plant Leaves / Q000378:metabolism; D010940:Plant Proteins / Q000378:metabolism*; D014908:Triticum / Q000378:metabolism*
chemical_list: D008670:Metals; D045332:Photosystem II Protein Complex; D010940:Plant Proteins