Download MendeleyCrystal structure and substrate-binding mode of a novel pectate lyase from alkaliphilic Bacillus sp. N16-5.
Zheng, Y., Huang, C.H., Liu, W., Ko, T.P., Xue, Y., Zhou, C., Guo, R.T., Ma, Y.(2012) Biochem Biophys Res Commun 420: 269-274
- PubMed: 22414692
- DOI: https://doi.org/10.1016/j.bbrc.2012.02.148
- Primary Citation of Related Structures:
3VMV, 3VMW - PubMed Abstract:
The pectate lyase (Bsp165PelA) from Bacillus sp. N16-5 has great potential in industrial applications because it shows high specific activity under extremely alkaline conditions. Besides, activity measurement of Bsp165PelA does not require addition of calcium, in a way different from the other pectate lyases. Here we report crystal structures of Bsp165PelA in apo-form and in complex with trigalacturonate. The parallel β-helix, active site residues and substrate binding cleft are similar to those in the other pectate lyases from Polysaccharide Lyase family 1. However, some of the highly conserved Ca(2+) binding residues and secondary structures are altered in Bsp165PelA, making it difficult to coordinate with Ca(2+) as in the other pectate lyases. We found Bsp165PelA forms some direct enzyme-substrate interactions instead of using Ca(2+) ions bridging in the extremely alkaline environment.
Organizational Affiliation:
Industrial Enzymes National Engineering Laboratory, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China.
