Xylosidase

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<StructureSection load='' size='350' side='right' caption='Structure of α-xylosidase family 31 complex with pentaerythritol propoxylate, sulfate, Ni+2 (small green) and Cl- (large green) ions (PDB entry [[2xvl]])' scene='55/551220/Cv/1'>
<StructureSection load='' size='350' side='right' caption='Structure of α-xylosidase family 31 complex with pentaerythritol propoxylate, sulfate, Ni+2 (small green) and Cl- (large green) ions (PDB entry [[2xvl]])' scene='55/551220/Cv/1'>
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__TOC__
== Function ==
== Function ==
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'''Xylosidase''' (XYL) catalyzes the hydrolysis of α- or β-glycosidic linkages. '''β-XYL''' catalyzes the endo-hydrolysis of 1,4-β-D-glycosidic or endo-hydrolysis of 1,3-β-D-glycosidic linkage<ref>PMID:15283123</ref>. '''α-XYL''' catalyzes the exo-hydrolysis of 1,4-β-D-glycosidic or exo-hydrolysis of 1,3-β-D-glycosidic linkage from the non-reducing termini of xylans<ref>PMID:10801892</ref>. XYL catalyzes the conversion of cellulose and hemicellulose xylan to xylose.
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'''Xylosidase''' (XYL) catalyzes the hydrolysis of α- or β-glycosidic linkages.
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*'''α-XYL''' catalyzes the exo-hydrolysis of 1,4-β-D-glycosidic or exo-hydrolysis of 1,3-β-D-glycosidic linkage from the non-reducing termini of xylans<ref>PMID:10801892</ref>. XYL catalyzes the conversion of cellulose and hemicellulose xylan to xylose.
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*'''β-XYL''' catalyzes the endo-hydrolysis of 1,4-β-D-glycosidic or endo-hydrolysis of 1,3-β-D-glycosidic linkage<ref>PMID:15283123</ref>.
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*'''α-XYL family 31''' catalyzes the hydrolysis of α-xylosyl from isoprimeverose<ref>PMID:35441671</ref>.
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*'''β-XYL family 3''' catalyzes the endo-hydrolysis of 1,4-β-D-glycosidic or endo-hydrolysis of 1,3-β-D-glycosidic linkage<ref>PMID:35120929</ref>.
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*'''β-XYL family 43''' and '''β-XYL family 52''' degrade xylooligosaccharides<ref>PMID:26494804</ref>, <ref>PMID:12738774</ref>.
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*'''β-XYL family 120''' degrades xylobiose and xylotriose<ref>PMID:31698702</ref>.
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*'''β-XYL/glucosidase''' bifunctional enzyme active on beta-xylosides and beta-glucosides.
== Structural highlights ==
== Structural highlights ==
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[[Xylosidase 3D structures]]
[[Xylosidase 3D structures]]
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</StructureSection>
 
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== 3D Structures of xylosidase ==
 
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Updated on {{REVISIONDAY2}}-{{MONTHNAME|{{REVISIONMONTH}}}}-{{REVISIONYEAR}}
 
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{{#tree:id=OrganizedByTopic|openlevels=0|
 
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*α-xylosidase
 
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**[[5jou]] – BoXYL – ''Bacterioides ovatus'' <BR />
 
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**[[5jov]] – BoXYL + piperazine derivative <BR />
 
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*α-xylosidase family 31
 
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**[[2xvg]], [[2xvk]] – CjXYL – ''Cellvibrio japonicus'' <BR />
 
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**[[2xvl]] – CjXYL + xylobiose <BR />
 
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**[[1xsi]], [[1xsj]], [[1we5]] – EcXYL – ''Escherichia coli''<br />
 
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**[[1xsk]] – EcXYL + intermediate<br />
 
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**[[6dru]] – XYL + xylopyranose - ''Aspergillus niger'' <BR />
 
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**[[5hxm]] – XYL + panose - ''Listeria monocytogenes'' <BR />
 
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*β-xylosidase
 
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**[[1yrz]] – XYL – ''Bacillus halodurans'' <BR />
 
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**[[1yif]] – XYL – ''Bacillus subtilis'' <BR />
 
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**[[5zqj]] – BpXYL – ''Bacillus pumilus'' <BR />
 
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**[[5zqx]] – BpXYL (mutant) + xylobiose <BR />
 
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**[[5zqs]] – BpXYL (mutant) + xylobiose + xylopyranose <BR />
 
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**[[4mlg]] – XYL – uncultured <BR />
 
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**[[3c2u]] – XYL + propane derivative – ''Selenomonas ruminantium'' <BR />
 
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*β-xylosidase family 3
 
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**[[5a7m]] – HjXYL – ''Hypocrea jecorina'' <BR />
 
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**[[5ae6]] – HjXYL + thioxylobiose <BR />
 
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*β-xylosidase family 39
 
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**[[1px8]], [[1uhv]] – TsXYL – ''Thermoanaerobacterium saccharolyticum'' <BR />
 
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**[[4ekj]] – XYL – ''Caulobacter vibrioides''<BR />
 
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**[[4m29]] – XYL – ''Caulobacter crscentus''<BR />
 
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**[[2bs9]], [[1w91]], [[4rhh]] – BsXYL – ''Bacillus stearothermophilus'' <BR />
 
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**[[2bfg]] – BsXYL + xylobiose <BR />
 
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*β-xylosidase family 43
 
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**[[1y7b]], [[1yi7]], [[3k1u]] – CaXYL – ''Clostridium acetobutylicum'' <BR />
 
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**[[3qed]], [[3qee]] – CjXYL <BR />
 
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**[[5z5d]] – GtXYL - ''Geobacillus thermoleovorans'' <BR />
 
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**[[5z5f]] – GtXYL + arabinose <BR />
 
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**[[5z5h]] – GtXYL + xylose <BR />
 
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**[[5z5i]] – GtXYL + arabinose + xylopyranose <BR />
 
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**[[2exh]] – BsXYL <BR />
 
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**[[2exi]] – BsXYL (mutant) <BR />
 
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**[[2exj]] – BsXYL + xylobiose <BR />
 
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**[[2exk]] – BsXYL (mutant) + xylobiose <BR />
 
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**[[3qef]] – CaXYL (mutant) + arabinofuranose <BR />
 
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**[[6ife]] – BpXYL <BR />
 
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*β-xylosidase family 52
 
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**[[4c1o]] – BtXYL – ''Bacillus thermoglucosidasius'' <BR />
 
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**[[4c1p]] – BtXYL + xylobiose <BR />
 
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*β-xylosidase family 120
 
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**[[3vst]] – TsXYL <BR />
 
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**[[3vsv]] – TsXYL + xylose <BR />
 
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**[[3vsu]] – TsXYL + xylobiose <BR />
 
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*β-xylosidase/glucosidase
 
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**[[6jbs]] – smLXYL - shiitake mushroom <BR />
 
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**[[6kj0]] – smXYL (mutant) <BR />
 
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*Exo-1,4-β-xylosidase
 
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**[[6q7i]] – AnXLND - Aspergillus nidulans <BR />
 
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**[[6q7j]] – AnXLND + xylobiose derivative <BR />
 
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}}
 
==References==
==References==
<references />
<references />
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</StructureSection>
[[Category:Topic Page]]
[[Category:Topic Page]]

Current revision

Structure of α-xylosidase family 31 complex with pentaerythritol propoxylate, sulfate, Ni+2 (small green) and Cl- (large green) ions (PDB entry 2xvl)

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Michal Harel, Alexander Berchansky, Joel L. Sussman

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