Deciphering the Flexibility and Dynamics of Geobacillus zalihae Strain T1 Lipase at High Temperatures by Molecular Dynamics Simulation (Supplementary Material)

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Abstract:

The stability of biocatalysts is an important criterion for a sustainable industrial operation economically. T1 lipase is a thermoalkalophilic enzyme derived from Geobacillus zalihae strain T1 (T1 lipase) that was isolated from palm oil mill effluent (POME) in Malaysia. We report here the results of high temperatures molecular dynamics (MD) simulations of T1 lipase in explicit solvent. We found that the N-terminal moiety of this enzyme was accompanied by a large flexibility and dynamics during temperature-induced unfolding simulations which preceded and followed by clear structural changes in two specific regions; the small domain (consisting of helices α3 and α5, strands β1 and β2, and connecting loops) and the main catalytic domain or core domain (consisting of helices α6- α9 and connecting loops which located above the active site) of the enzyme. The results suggest that the small domain of model enzyme is a critical region to the thermostability of this organism.





Keywords: Thermostability; flexibility; lipase; protein dynamics; thermoalkalophilic enzyme

Document Type: Research Article

DOI: http://dx.doi.org/10.2174/092986609789353763

Publication date: November 1, 2009

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.

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