Structural characterization and rheological properties of an extracellular glucuronan produced by a Rhizobium meliloti M5N1 mutant strain.
The mutant strain M5N1 C.S. (NCIMB 40472) of Rhizobium meliloti M5N1 is able to produce during fermentation a partially acetylated extracellular (1-->4)-beta-D-glucuronan. At low concentration (1 g.l-1), in the presence of monovalent cations, this new glucuronate behaves as a thickening agent, whereas at higher concentration a thermoreversible gel is obtained. With such divalent cations as Ca2+, a thermally stable gel can be formed.
Heyraud
A
A
Centre de Recherches sur les Macromolécules Végétales (CNRS), Grenoble, France.
Courtois
J
J
Dantas
L
L
Colin-Morel
P
P
Courtois
B
B
D002240:Carbohydrate Sequence; D002480:Cellulase / Q000378:metabolism; D005965:Glucuronates / Q000737:chemistry* / Q000378:metabolism; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D011135:Polysaccharides, Bacterial / Q000737:chemistry* / Q000378:metabolism; D012212:Rheology; D016962:Sinorhizobium meliloti / Q000737:chemistry* / Q000235:genetics; D000516:alpha-Amylases / Q000378:metabolism
D005965:Glucuronates; D011135:Polysaccharides, Bacterial; D000516:alpha-Amylases; D002480:Cellulase