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Spectral transformations in purple membranes of halobacterium halobium effect of the transition 560 570 and blue light on photochemical processes


, : Spectral transformations in purple membranes of halobacterium halobium effect of the transition 560 570 and blue light on photochemical processes. Biofizika 23(6): 1019-1023

Effect of reversible photodependent spectral transition 560 .tautm. 570 of the basic absorption band in purple membranes (PM) in water on the accumulation of short-living forms 412 and 650 of bacteriorhodopsin (BR) photochemical cycle was studied. Photochemical transformations in BR proceed as a minimum by 2 independent cycles, whose initial spectral forms were represented by BR with retinene in the form 13 cis and BR with retinene in the form of trans. In the course of the transition 560 .tautm. 570 a long-living spectral form 370-410-430 sensitive to the blue light is formed. This and literature data suggested a new scheme of photochemical processes in PM and connection between some stages of these processes and ejection and absorption of PM proton was proposed.

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Related references

Vsevolodov, N.N.; Chekulaeva, L.N., 1978: Spectral transformations in purple membranes of Halobacterium halobium: effect of 560-570 transition and blue light on photochemical processes. Effect of reversible photodependent spectral transition 560 in equilibrium 570 of the basic absorption band in purpur membranes (PM) in water on the accumulation of short-living forms 412 and 650 of bacteriorhodopsin (BR) photochemical cycle was s...

Vsevolodov N.N.; Chekulayeva L.N., 1978: Spectral conversions in purple membranes of halobacterium halobium effect of the 560 to 570 transition and blue light on photochemical processes. Biophysics (English Translation of Biofizika) 23(6): 1034-1038

Vsevolodov, N.N.; Chekulaeva, L.N., 1978: Spectral transitions in purple membranes from Halobacterium halobium. I. Effect of preliminary illumination on photochemical processes. The effect of preliminary illumination of purple membranes by yellow light on the difference spectra of short-lived intermediates has been studied. It has been found that changes of the optical density of two of these intermediates, which have the...

Vsevolodov, N.N.; Chekulaeva, L.N., 1978: Spectral transitions in purple membranes from halobacterium halobium part 1 effect of preliminary illumination on photochemical processes. The effect of preliminary illumination of purple membranes by yellow light on the difference spectra of short-lived intermediates was studied. Changes of the optical density of 2 of these intermediates, which have the maxima of the difference spec...

Chang C H.; Jonas R.; Govindjee R.; Ebrey T.G., 1988: Regeneration of blue and purple membranes from deionized bleached membranes of halobacterium halobium. Bleached purple membrane normally binds Ca2+ and Mg2+, which can be removed by the divalent cation chelator ethylenediaminetetraacetic acid (EDTA). Regeneration of pigments from EDTA-treated bleached membrane (apomembrane) and retinal leads to the...

Shnyrov V.L.; Filippova E.A.; Chekulaeva L.N.; Sukhomudrenko A.G., 1981: Conformational analysis and thermo induced transformations of bacterio rhod opsin in purple membranes from halobacterium halobium. In a study on the conformational lability of bacteriorhodopsin in purple membranes isolated from H. halobium, heating broke .apprx. 30% of the initial .alpha.-helical structure. The stability of the remaining .alpha.-helical fragments against heat...

Pande, C.; Callender, R.H.; Chang, C.H.; Ebrey, T.G., 1985: Resonance Raman spectra of the "blue" and the regenerated "purple" membranes of Halobacterium halobium. Photochemistry and Photobiology 42(5): 549-552

Hashimoto, S.; Miura, K.; Yamaguchi, T.; Takeuchi, H.; Harada, I., 1992: Ultraviolet resonance Raman study on purple and blue membranes of Halobacterium halobium. Photochemistry & Photobiology 56(6): 1097-1103

Litvin, F.F.; Balashov, S.P.; Sineshchekov, V.A., 1975: Study of the primary photochemical conversions of bacterio rhod opsin in purple membranes and cells of halobacterium halobium by the low temperature spectrophotometry method. The fast photochemical reaction of bacteriorhodopsin (maximum absorption at 570 nm), giving formation to a product absorbing at 520-720 nm (P600) under excitation in the region of 400-600 nm, was found in H. halobium cells and dry films prepared f...

Tomioka H.; Kamo N.; Takahashi T.; Kobatake Y., 1984: Photochemical intermediate of 3rd rhodopsin like pigment in halobacterium halobium by simultaneous illumination with red and blue light. A new photochemical intermediate of the 3rd rhodopsin-like pigment (tR) or slow cycling rhodopsin-like pigment (sR) was found in H. halobium, which was produced by simultaneous illumination with red and blue light. This illumination is employed fo...