Binding mode study of β-glucosidase b from p.Polymyxca with cellobiose and laminaribiose

• Main Authors: Azman, M., Md. Nor, Hasanan, Hainin, Mohd. Rosli, Yaacob, Haryati, Ismail, Che Ros, Mazlan, Nur Shima Fadhilah, Ahmad Khairudin, Nurul Bahiyah
• Format: Article
• Published: 2013
• Subjects: TP Chemical technology
• Online Access: http://eprints.utm.my/id/eprint/47826/; https://www.researchgate.net/publication/272950243_Binding_Mode_Study_of_b-glucosidase_B_from_P_Polymyxca_with_Cellobiose_and_Laminaribiose

Beta-glucosidase (3.2.1.21) plays an essential role in the removal of non-reducing terminal glucosyl residues from sacharides and glycosides. Recently, beta-glucosidase has been of interest for biomass conversion that acts in synergy with two other enzymes, endo-glucanase and exo-glucanase. However, there is not much information regarding the molecular interactions of beta-glucosidase with cellobiose. Thus, this study reports on the binding modes between beta-glucosidase from glycoside hydrolase family 1 namely BglB with cellobiose and laminaribiose via molecular docking method. Further analysis on the hydrophobic interactions revealed the key residues involved in forming hydrogen bonds (h-bond) with the substrates. The important residues were reported to be Gln22, Glu167, Tyr298, Glu356, Glu402, and Trp410. These findings may provide valuable insigths in designing beta-glucosidase with higher cellulose-hydrolyzing efficiency.