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Time‐dependent Changes in the Carotenoid Composition and Preferential Binding of Spirilloxanthin to the Reaction Center and Anhydrorhodovibrin to the LH1 Antenna Complex in Rhodobium marinum ¶
Author(s) -
Qian Pu,
Saiki Kayoko,
Mizoguchi Tadashi,
Hara Kazukimi,
Sashima Tokutake,
Fujii Ritsuko,
Koyama Yasushi
Publication year - 2001
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1562/0031-8655(2001)0740444tdcitc2.0.co2
Subject(s) - composition (language) , antenna (radio) , photosynthetic reaction centre , carotenoid , chemistry , fish <actinopterygii> , center (category theory) , food science , biology , fishery , biochemistry , crystallography , computer science , telecommunications , photosynthesis , philosophy , linguistics
Carotenoids were isolated from the cells of Rhodobium marinum, and their structures were determined by mass spectrometry and 1 H nuclear magnetic resonance spectroscopy; the carotenoids include lycopene, rhodopin, anhydrorhodovibrin, rhodovibrin and spirilloxanthin. Time‐dependent changes in the carotenoid composition in the reaction center (RC) and the light‐harvesting complex 1 (LH1) were traced by high‐performance liquid chromatography analysis of the extracts. The carotenoid composition changed according to the spirilloxanthin biosynthetic pathway. However, spirilloxanthin having the longest conjugated chain was always preferentially bound to the RC, and anhydrorhodovibrin and other precursors to the LH1.