Molecular dynamics simulations of human alpha-lactalbumin: changes to the structural and dynamical properties of the protein at low pH.
Two 700-ps molecular dynamics simulations of human alpha-lactalbumin have been compared. Both were initiated from an X-ray structure determined at pH 6.5. One simulation was designed to represent native conditions and the other the protein in solution at pH 2.0 without a bound calcium ion. The low pH conditions were modelled by protonating the aspartate, glutamate, and histidine side chains and the protein C-terminus. Significant changes were observed for the C-terminal region of the sequence...Expand abstract
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