Carbohydrate Binding Module Family 91

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• Author: Daichi Ito
• Responsible Curator: Elizabeth Ficko-Blean

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CAZy DB link

https://www.cazy.org/CBM91.html

Ligand specificities

CBM91 bind oat spelt xylan with K_a value of 2.0×10^-5 M^-1, and can bind birchwood xylan. But it does not bind to cellulosic substrates, carboxymethyl-cellulose, ball-milled cellulose and lichnan. So, CBM91 can recognize and bind to insoluble xylan [1].

Structural Features

Figure. The structure of CBM91. The prediction structure by Alpha Fold 2 of CBM91(red). This CBM91 is appended to the catalytic domain of PxXyl43A(green).

• Fold: β-sandwich
• Type: Type B

Family Firsts

First Identified

CBM91 from Paenibacillus xynaniclasticus strain TW1 [1].

First Structural Characterization

β-D-xylosidase, a family 43 glycoside hydrolase from Clostridium acetobutylicum ATCC 824 PDB ID 1Y7B.

References

1. Ito D, Nakano E, Karita S, Umekawa M, Ratanakhanokchai K, and Tachaapaikoon C. (2022). Characterization of a GH Family 43 β-Xylosidase Having a Novel Carbohydrate-binding Module from Paenibacillus xylaniclasticus Strain TW1. J Appl Glycosci (1999). 2022;69(3):65-71. DOI:10.5458/jag.jag.JAG-2022_0001 |