Isolation of a New Carotenoid and Two New Carotenoid Glycosides fromCurtobacterium flaccumfaciens pvar poinsettiae

Abstract

An efficient method for the extraction of the carotenoids from Curtobacterium flaccumfaciens pvar poinsettiae was developed. The glucosides of C.p. 450 (=(all‐E,2R,2′R)‐2‐[4‐(β‐D‐glucopyranosyloxy)‐3‐methylbut‐2‐enyl]‐2′‐(4‐hydroxy‐3‐methylbut‐2‐enyl)‐β, β‐carotene; 4) and of C.p. 473 (=(all‐E,2R,2′S)‐2‐[4‐(β‐D‐glucopyranosyloxy)‐3‐methylbut‐2‐enyl]‐2′‐(3‐methylbut‐2‐enyl)‐3′,4′‐didehydro‐1′,2′‐dihydro‐β,ψ‐caroten‐1′‐ol; 5) were isolated for the first time. In addition, the hitherto unknown 3′,4′‐dihydro derivative of C.p. 450, called C.p. 460 (=(all‐E,2R,2′R)‐2‐(4‐hydroxy‐3‐methylbut‐2‐enyl)‐2′‐(3‐methylbut‐2‐enyl)‐1′,2′‐dihydro‐β,ψ‐caroten‐1′‐ol; 6), was identified. The structures were established by UV/VIS, CD, 1H‐ and 13C‐NMR, and mass spectra.

Simple glycolipids of microbes: Chemistry, biological activity and metabolic engineering

“… [102] Actinobacteria 9.3-Bicyclic glycocarotenoids Corynexanthin monoglycoside Corynebacterium sp. [103] Actinobacteria Corynexanthin diglycoside Arthrobacter sp [104] Actinobacteria Sarcixanthin monoglucosides Curtobacterium fl accumfaciens [105] , Micrococcus luteus [106] , M. yunnanensis [107] . Actinobacteria Sarcixanthin diglucosides Micrococcus luteus [106] , M. yunnanensis [107] .…”

Astonishing diversity of natural surfactants: 3. Carotenoid glycosides and isoprenoid glycolipids

“…Curtobacterium flaccumfaciens pvar. poinsettiae produced some acyclic, bicyclic, and monocyclic glycosides, 95 (87).…”

“…(124), and 154a was recently discovered in Curtobacterium flaccumfaciens pvar. poinsettiae (87). Two mono-(154a) and di-(154b) glucosides of sarcinaxanthin were isolated from Micrococcus luteus (formerly Sarcina lutea) (125)(126)(127)(128).…”