Download MendeleyStructural analyses and yeast production of the beta-1,3-1,4-glucanase catalytic module encoded by the licB gene of Clostridium thermocellum.
Chen, C.C., Huang, J.W., Zhao, P., Ko, T.P., Huang, C.H., Chan, H.C., Huang, Z., Liu, W., Cheng, Y.S., Liu, J.R., Guo, R.T.(2015) Enzyme Microb Technol 71: 1-7
- PubMed: 25765303
- DOI: https://doi.org/10.1016/j.enzmictec.2015.01.002
- Primary Citation of Related Structures:
3WVJ - PubMed Abstract:
A thermophilic glycoside hydrolase family 16 (GH16) β-1,3-1,4-glucanase from Clostridium thermocellum (CtLic16A) holds great potentials in industrial applications due to its high specific activity and outstanding thermostability. In order to understand its molecular machinery, the crystal structure of CtLic16A was determined to 1.95Å resolution. The enzyme folds into a classic GH16 β-jellyroll architecture which consists of two β-sheets atop each other, with the substrate-binding cleft lying on the concave side of the inner β-sheet. Two Bis-Tris propane molecules were found in the positive and negative substrate binding sites. Structural analysis suggests that the major differences between the CtLic16A and other GH16 β-1,3-1,4-glucanase structures occur at the protein exterior. Furthermore, the high catalytic efficacy and thermal profile of the CtLic16A are preserved in the enzyme produced in Pichia pastoris, encouraging its further commercial applications.
Organizational Affiliation:
Industrial Enzymes National Engineering Laboratory, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China.
