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Simulations of Cellulose Synthesis Initiation and Termination in Bacteria.

The processivity of cellulose synthesis in bacterial cellulose synthase (CESA) was investigated using molecular dynamics simulations and the hybrid quantum mechanics and molecular mechanics approach. Our results suggested that cellulose synthesis in bacterial CESA can be initiated with H2O molecules. The chain length or degree of polymerization (DOP) of the product cellulose is related to the affinity of the cellulose chain to the transmembrane tunnel of the enzyme. This opens up the possibility of generating mutants that would produce cellulose chains with desired chain lengths that could have applications in the biofuel and textile fields that depend on the DOP of cellulose chains.