Metabolic Modeling Tutorial
discounted EARLY registration ends Dec 31, 2014
Metabolic Modeling Tutorial
discounted EARLY registration ends Dec 31, 2014
Metabolic Modeling Tutorial
discounted EARLY registration ends Dec 31, 2014
Metabolic Modeling Tutorial
discounted EARLY registration ends Dec 31, 2014
Metabolic Modeling Tutorial
discounted EARLY registration ends Dec 31, 2014
twitter

MetaCyc Compound Class: a (1→4)-β-D-xylan

Superclasses: all carbohydrates a carbohydrate a glycan a polysaccharide hemicellulose xylan

Summary:
(1→4)-β-D-xylan is a polymer of β-D-xylopyranose residues connected by (1→4) links. It is found in the cell walls of plants and some green and red algae, and is the major constituent of hemicellulose. Pure xylan, consisting of only xylopyranosyl residues, is rare. Most forms of a (1→4)-β-D-xylan are decorated with other types of sugar.

Child Classes: a (1->4)-β-D-xylan oligosaccharide (0) , a glucuronoarabinoxylan (0) , a glucuronoxylan (0) , acetylxylan (0) , an arabinoglucuronoxylan (0) , an arabinoxylan (0) , feraxan (0)

SMILES: C1(O[R2])(OCC(C(O)C(O)1)OC2(OCC(C(O)C(O)2)OC3(OCC(C(O)C(O)3)OC4(OCC(O[R1])C(O)C(O)4))))

Unification Links: CAS:9014-63-5 , ChEBI:15447 , KEGG:C02352

Reactions known to consume the compound:

(1,4)-β-xylan degradation :
a (1→4)-β-D-xylan → a (1->4)-β-D-xylan oligosaccharide

cellulose and hemicellulose degradation (cellulolosome) :
a (1→4)-β-D-xylan + n H2O → n a (1->4)-β-D-xylan oligosaccharide

xylan biosynthesis :
UDP-α-D-xylose + [(1->4)-β-D-xylan](n) → UDP + [(1->4)-β-D-xylan](n+1)
UDP-β-L-arabinopyranose + a (1→4)-β-D-xylan → an arabinoxylan + UDP
UDP-α-D-glucuronate + a (1→4)-β-D-xylan → a glucuronoxylan + UDP

Not in pathways:
a glucuronoxylan + H2O → 4-O-methyl-α-D-glucuronate + a (1→4)-β-D-xylan


xylan + n H2O → n α-D-xylopyranose
acetylxylan + n H2O → xylan + n acetate


a polysaccharide + H2O → an oligosaccharide

Reactions known to produce the compound:

cellulose and hemicellulose degradation (cellulolosome) :
a feruloyl-polysaccharide + H2O → ferulate + a polysaccharide + 2 H+

Not in pathways:
an N-acetyl-β-D-galactosalaminyl-[glycan] + H2O → a glycan + N-acetyl-β-D-galactosamine

Credits:
Created 04-Apr-2011 by Caspi R , SRI International


Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
Page generated by SRI International Pathway Tools version 18.5 on Sun Nov 23, 2014, BIOCYC14A.