Acetylxylan esterase

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{{STRUCTURE_3m83| PDB=3m83 | SIZE=400| SCENE= |right|CAPTION=Acetylxylan esterase hexamer complex with paraoxon inhibitor, ethylene glycol, acetate and Ca+2 ions, [[3m83]] }}
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{{STRUCTURE_3m83| PDB=3m83 | SIZE=350| SCENE= |right|CAPTION=Acetylxylan esterase hexamer complex with paraoxon inhibitor, ethylene glycol, acetate and Ca+2 ions, [[3m83]] }}
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Revision as of 11:32, 30 November 2015

Template:STRUCTURE 3m83


Function

Acetylxylan esterase (AXE) catalyzes the deacetylation of xylans and xylo-oligosaccharides. AXE is involved in the biodegradation of hemicellulose. AXE hydrolyzes the ester linkages of the acetyl groups in position 2 and/or 3 of xylose moiety of naturally acetylated xylan from hardwood. AXE is one of the accessory enzymes which are part of the xylanolytic system. Together with xylanase, β-xylosidase, α-arabinofuranosidase and methylglucoronidase, AXE is required for the complete degradation of xylan.

Relevance

Solubility of cellulose is critical for the use of this abundant biomass as biofuel. Xylan is the major constituent of hemicellulose which is the second most abundant polysaccharide in plants. Several enzymes are needed for making cellulose soluble via complete hydrolysis. Among those are cellulase, xylanase and AXE.

3D structures of acetylxylan esterase

Updated on 30-November-2015

Proteopedia Page Contributors and Editors (what is this?)

Michal Harel, Alexander Berchansky, Joel L. Sussman

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