Structure of simusan, a new acidic exopolysaccharide from Arthrobacter sp.
Simusan, a major exopolysaccharide produced by an ethanol-utilizing Arthrobacter sp. strain CE-17, contains D-glucose, D-mannose, D-galactose, L-rhamnose, D-glucuronic acid, and pyruvic acid in the ratios approximately 3:2:1:1:1:1 as well as O-acyl groups (presumably (presumably residues of acetic and palmitic acid). On the basis of chemical modifications of the polysaccharide, solvolysis with anhydrous hydrogen fluoride resulting in a penta- and an octa-saccharide fragment, Smith degradation, and 1H and 13C NMR analysis, the following structure of the repeating unit was established: [formula: see text] It is suggested that at least one of the glucose residues and the galactose residue are O-acetylated.
Senchenkova
S N
SN
N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russian Federation.
Knirel
Y A
YA
Likhosherstov
L M
LM
Shashkov
A S
AS
Shibaev
V N
VN
Starukhina
L A
LA
Deryabin
V V
VV
D001173:Arthrobacter / Q000737:chemistry*; D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D015394:Molecular Structure; D011135:Polysaccharides, Bacterial / Q000737:chemistry* / Q000302:isolation & purification
D011135:Polysaccharides, Bacterial; C092853:simusan