Study of effect of molecular mobility in chromatophore membranes of the bacterium <Emphasis Type="Italic">E. shaposhnikovii</Emphasis> on processes of photoinduced electron transport using the NMR-Spin-Echo method with isotope substitution and dehydration |
| |
Authors: | C S Chamorovsky S K Chamorovsky P P Knox |
| |
Institution: | 1.Department of Biophysics, Biology Faculty,Lomonosov Moscow State University,Moscow,Russia |
| |
Abstract: | The effect of dehydration and 2H2O/H2O isotope substitution on electron transport reactions and relaxation of proton-containing groups was studied in chromatophore
membranes of Ectothiorhodospira shaposhnikovii. During dehydration (including isotope substitution of hydrate water) of preliminarily dehydrated isolated photosynthetic
membranes there was a partial correlation between hydration intervals within which activation of electron transport from high-potential
cytochrome c to photoactive bacteriochlorophyll dimer P890 of photosynthetic reaction center and variation of spin-lattice and spin-spin
proton relaxation time was observed. Partial correlation between hydration intervals can be considered as evidence of correlation
between mobility of non-water proton-containing groups with proton relaxation frequency ∼108 sec−1 with efficiency of electron transfer at the donor side of the chain. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |