PolySacDb

A Database of Polysachharide 3D structures

 
By A. Sarkar & S. Pérez
 
 
 

Polysaccharides For Experts

Gellan K (Potassium Gellan)

 

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Diffraction Diagram

 

Fig.1 X-Ray fiber diffraction pattern from a well oriented and polycrystalline sample of the potassium salt of gellan.

*Permission Pending for Diffraction Diagrams

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Structures are best viewed using PyMol & Sybyl

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  Gellan K (Potassium Gellan)

Linkage :       alpha 1-3      beta 1-4

 

Space Group :       trigonal P31

 

Unit Cell Dimensions (a, b, c in Å and α, β, γ in °)

(No values are displayed if no information is available or the value is zero)

a (Å) =   15.75

b (Å) =   15.75

c (Å) =   28.15

 

γ (°) =   120.00

 

Helix Type :      

parallel, half-staggered, double helix in which each polysaccharide chain is a left-handed, 3-fold helix

 

Method(s) Used For Structure Determination :      

X-ray diffraction

 

Link to the Abstract :      
 
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFF-431C9W3-H1&_user=10&_coverDate=10%2F01%2F1988&_rdoc=1&_fmt=high&_orig=search&_origin=search&_sort=d&_docanchor=&view=c&_searchStrId=1620768860&_rerunOrigin=google&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=d7a26ce34e7c29772aa28e17c746eb6e&searchtype=a

 

Reference :      

Cation interactions in gellan: An x-ray study of the potassium salt
Chandrasekaran, R., Puigjaner, L.C., Joyce, K.L., Arnott, S., Carbohydrate Research 1988, 181, 23-40

 

 

Download Structure

Unit          gellan-K_expanded

 

 

 

 

 
   
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