Xylosidase

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. 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. XYL catalyzes the conversion of cellulose and hemicellulose xylan to xylose.

3D Structures of xylosidase

Updated on 04-July-2013

α-xylosidase family 31

2xvg, 2xvk – CjXYL – Cellvibrio japonicus

2xvl – CjXYL + xylobiose

β-xylosidase

1yrz – XYL – Bacillus halodurans

1yif – XYL – Bacillus subtilis
3c2u – XYL + propane derivative – Selenomonas ruminantium

β-xylosidase family 39

1px8, 1uhv – TsXYL – Thermoanaerobacterium saccharolyticum

4ekj – XYL – Caulobacter vibrioides
2bs9, 1w91 – BsXYL – Bacillus stearothermophilus
2bfg – BsXYL + xylobiose

β-xylosidase family 43

1y7b, 1yi7, 3k1u – CaXYL – Clostridium acetobutylicum

3qed, 3qee – CjXYL
2exh – BsXYL
2exi – BsXYL (mutant)
2exj – BsXYL + xylobiose
2exk – BsXYL (mutant) + xylobiose
3qef – CaXYL (mutant) + arabinofuranose

β-xylosidase family 120

3vst – TsXYL

3vsv – TsXYL + xylose
3vsu – TsXYL + xylobiose