Agrobacterium rubiT DSM 6772 Produces a Lipophilic Polysaccharide Capsule whose Degree of Acetylation is Growth Modulated
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- 作者：Cristina De Castro ; Valentina Gargiulo ; Rosa Lanzetta ; Michelangelo Parrilli
- 刊名：Biomacromolecules
- 出版年：2007
- 出版时间：March 2007
- 年：2007
- 卷：8
- 期：3
- 页码：1047 - 1051
- 全文大小：114K
- 年卷期：v.8,no.3(March 2007)
- ISSN：1526-4602
文摘
The structure of the capsular polysaccharide produced from the type strain of Agrobacterium rubi DSM 6772 isdemonstrated by means of chemical and spectroscopical methodologies. It is constituted from the quite raremonosaccharide 6-deoxy-L-talose, involved in alternating 
-(1 
2) and -(1 3) linkages. This simple backboneis further complicated from the occurrence of O-acetyl substituents located always at O-2 of the O-3 substituted6-deoxy-talose. This decoration is not stoichiometric and it depends on the growth stadium of the bacterium,leading to an almost regular acetylation pattern only at the stationary phase, where all the potential positions aresubstituted.
-(1 2) and -(1 3) linkages. This simple backboneis further complicated from the occurrence of O-acetyl substituents located always at O-2 of the O-3 substituted6-deoxy-talose. This decoration is not stoichiometric and it depends on the growth stadium of the bacterium,leading to an almost regular acetylation pattern only at the stationary phase, where all the potential positions aresubstituted.