PolySacDb

A Database of Polysachharide 3D structures

 
By A. Sarkar & S. Pérez
 
 
 

Polysaccharides For Experts

α-D-1→ 3-mannan

 

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Diffraction Diagram

 

Fig.1 The X-ray fiber pattern of (1→3)-α-D-mannan hydrate . The fiber axis is vertical .

*Permission Pending for Diffraction Diagrams

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  α-D-1→ 3-mannan

Linkage :       alpha 1-3     

 

Space Group :       monoclinic P21

 

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) =   11.33

b (Å) =   18.36

c (Å) =   8.25

 

γ (°) =   101.75

 

Helix Type :      

two-fold helix, but with all four 0-6 rotational positions nonequivalent . The chains pack with antiparallel polarity and are connected by pairs of intermolecular hydrogen bonds that form an infinite, zig-zag sheet.

 

Method(s) Used For Structure Determination :      

X-ray diffraction and stereochemical model refinement

 

Link to the Abstract :      
 
http://www.ncbi.nlm.nih.gov/pubmed/1516106

 

Reference :      

Molecular and crystal structure of the regenerated form of (1 → 3)-?-D-mannan
Toshifumi Yui, Kozo Ogawa and Anatole Sarko , Carbohydrate Research 1992, 229 (1), Pages 57-74

 

 

Download Structure

Unit          1,3-alpha-D-mannan_expanded

 

 

 

 

 
   
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