ID 2.1.1.210 DE demethylspheroidene O-methyltransferase. AN 1-HO-carotenoid methylase. AN 1-hydroxycarotenoid methylase. AN 1-hydroxycarotenoid O-methylase. CA demethylspheroidene + S-adenosyl-L-methionine = H(+) + S-adenosyl-L- CA homocysteine + spheroidene. CC -!- In Rhodopseudomonas capsulata and Rubrivivax gelatinosus the enzyme CC is involved in biosynthesis of spheroidene. CC -!- In Rubrivivax gelatinosus the enzyme also catalyzes the methylation CC of demethylspirilloxanthin to spirilloxanthin and the methylation of CC 3,4-didehydrorhodopin to anhydrorhodovibrin. DR P54906, CRTF_CERS4 ; P0CY89, CRTF_RHOCA ; D5AP78, CRTF_RHOCB ; //