PolySacDb

A Database of Polysachharide 3D structures

 
By A. Sarkar & S. Pérez
 
 
 

Polysaccharides For Experts

Chitin II (chitin α)

 

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Diffraction Diagram

 

Fig.1 Optically derived Fourier Transforms (diffractograms) from the (100), (010) and (001) projections (a), (b) and (c) respectively, of the best model of chitin. (d) is the composite diffractogram of (a), (b) and (c) with the reflections of (b) transferred to the equator; (e) the disorientation and the fading off have been introduced artificially in order to match the X-ray diffraction pattern. The fiber axis is vertical except in (b) where it is perpendicular to the plane of the figure.

*Permission Pending for Diffraction Diagrams

(Please right-click & view the image if it appears distorted here)

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Structures are best viewed using PyMol & Sybyl

(Please download the structure and view in a stand-alone viewer if the structure appears distorted in Jmol)

 

  Chitin II (chitin α)

Linkage :       beta 1-4     

 

Space Group :       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) =   4.74

b (Å) =   18.86

c (Å) =   10.32

 

γ (°) =   90.00

 

Helix Type :      

The stereochemical configuration of the polysaccharide chains has certain implications for the structure of cellulose

 

Method(s) Used For Structure Determination :      

X-ray diffraction

 

Link to the Abstract :      
 
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2224123/

 

Reference :      

The crystal structure of ?-chitin (Poly-N-ACETYL-D-Glucosamine)
Carlstrom, D., J.Biochem. Biophys. Cytol. 1957, 3, 669-683

 

 

Download Structure

Unit          a-chitin-new_expanded

 

 

 

 

 
   
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