کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9607000 44581 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reconstruction of the water-oxidizing complex in manganese-depleted Photosystem II using synthetic manganese complexes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Reconstruction of the water-oxidizing complex in manganese-depleted Photosystem II using synthetic manganese complexes
چکیده انگلیسی
The efficiency of a trinuclear and two binuclear manganese complexes in reconstituting electron transport and O2 evolution activity in Mn-depleted Photosystem II preparations is analyzed. The trinuclear Mn-complex is more efficient than two binuclear Mn-complexes in restoring oxygen evolution, but it is less effective as an electron donor than binuclear Mn-complexes. It is inferred from our results that recovery of electron transport and O2 evolution with polynuclear Mn-complexes is affected with different factors. Moreover, the trinuclear Mn-complex is extremely sensitive to the addition of CaCl2. It is suggested that there is an interaction between Ca2+ and carboxyl within the trinuclear Mn-complex during photoactivation and this interaction benefits the ligation of Mn atom to the apo-WOC and form an active WOC. Binuclear Mn(III)Mn(III) complex shows slightly higher efficiency than binuclear Mn(III)Mn(IV) complex in restoration of O2 evolution activity. The efficiency of three Mn-complexes in the reconstitution of WOC is in an order: trinuclear Mn3(III) > binuclear Mn(III)Mn(III) > binuclear Mn(III)Mn(IV).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 81, Issue 2, 1 November 2005, Pages 114-120
نویسندگان
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