Abstract
In this study, the artificial chromatophore was constructed by reconstitution of light-harvesting complex 2 (LH2) and core-complex (LH1-RC) from Thermochromatium tepidum in egg phosphatidylcholine (PC) liposome. By calcium ion dependent absorption changes, the orientations of protein complexes in liposomes solely were assigned. Ultrafast EET dynamics were studied by fs time-resolved absorption spectroscopy on both the artificial and natural chromatophores at their RC ‘open’ and ‘close’ states, respectively. The results indicated that these two membrane systems have similar EET dynamic profiles, and the orientations of LH2 and LH1-RC complexes in artificial chromatophores were opposite to those in natural chromatophores.
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