
TY  - JOUR
A1  - Takaichi, Shinichi 
A1  - Maoka, Takashi 
A1  - Masamoto, Kazumori 
T1  - Myxol 2'-dimethyl-fucoside, (3R,2'S)-myxol 2'-(2,4-di-O-methyl-alph-L-fucoside), in Synechocystis sp. PCC 6803 and nomenclature of myxoxanthophyll
JF  - Science Access
JO  - 
Y1  - 2001
VL  - 3
IS  - 1
SP  - 
EP  - 
KW  - 
UR  - https://doi.org/10.1071/SA0403059 
N2  - We identified the molecular structures of the carotenoids in Synechocystis sp. PCC 6803 based on absorption spectra, retention times on HPLC, FD-MS, CD, 1H- and 13C-NMR spectral data. Myxoxanthophyll in this cyanobacterium was myxol 2'-dimethyl-fucoside, (3R,2'S)-myxol 2'-(2,4-di-O-methyl-a-L-fucoside). The sugar moiety of the pigment was not rhamnose but dimethylated fucose, which has not been reported in carotenoid glycosides. The other carotenoids were ß-carotene, (3R,3'R)- zeaxanthin, echinenone, (3'R)-3'-hydroxyechinenone and deoxymyxol 2'-dimethyl- fucoside, (2'S)-deoxymyxol 2'-(2,4-di-O-methyl-a-L-fucoside). Pathway and enzymes of carotenogenesis will be discussed.  Generally, the group of polar carotenoids in cyanobacteria is referred to as myxoxanthophyll, and the structure is considered to be myxol 2'-rhamnoside. Since the name myxoxanthophyll can not specify the sugar moiety and the identification of the sugar moiety is unfeasible in many cyanobacteria, we propose the following naming convention: when the sugar moiety has not been identified, the name is myxol glycoside. If the sugar moieties have been identified, the names should be, for example, myxol 2'-rhamnoside, myxol 2'-a-L-fucoside and (3R,2'S)-myxol 2'-(2,4-di-O-methyl-a-L-fucoside). The use of myxoxanthophyll should be avoided.   S. Takaichi et al. (2001) Plant Cell Physiol., in press. 
ER  -

