Curdlan

Curdlan
Identifiers
ChemSpider
  • none
E number E424 (thickeners, ...)
UNII
Properties
(C6H10O5)n
Appearance odourless white powder
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

Curdlan is a water-insoluble linear beta-1,3-glucan, a high-molecular-weight polymer of glucose. Curdlan consists of β-(1,3)-linked glucose residues and forms elastic gels upon heating in aqueous suspension.

It was initially reported to be produced by "Alcaligenes faecalis var. myxogenes" strain 10C3-K in 1966. This classification for the strain and its descendants is now understood to be inaccurate, giving rise to the new name "Agrobacterium fabrum". The modern industrial strain "A. fabrum" ATCC 31749 had its genome sequenced in 2011. Some sources prefer the open nomenclature Agrobacterium sp.

Extracellular and capsular polysaccharides are produced by a variety of pathogenic and soil-dwelling bacteria. Curdlan is a neutral β-(1,3)-glucan, perhaps with a few intra- or interchain 1,6-linkages, produced as an exopolysaccharide by soil bacteria of the family Rhizobiaceae. It is also produced by Cellulomonas flavigena, which belongs to a different phylum.


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