Molecular dynamics investigations of cello-oligosaccharide recognition by Cel9G–CBM3c from Clostridium cellulovorans

Literature Information

Publication Date 2018-01-23
DOI 10.1039/C7CP07175B
Impact Factor 3.676
Authors

Penghui Li, Chunchun Zhang


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Abstract

The processive mechanism of cellulases against cellulose represents one of the key mechanisms in the conversion of biomass. A reliable model of substrate binding in a multidomain cellulase is a prerequisite for fully understanding this mechanism. In this study, the specificity of the recognition of the polysaccharide by the multidomain endoglucanase Cel9G from Clostridium cellulovorans was investigated by molecular dynamics simulations. Aromatic ring-containing residues were found to be critical for stabilizing the substrate. The calculated subtotal contributions of polar residues close to the active site, e.g., D58, E244, R315 and D420, also have some critical functions in substrate binding. Unlike other members of the carbohydrate-binding module family, CBM3c alone is shown not to bind cellulose very well, which is also consistent with experimental conclusions.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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