Article
Heterotropic effectors promote a global conformational change in aspartate transcarbamoylase.
Biochemistry - 17 Apr 1990
Eisenstein E, Markby D W, Schachman H K
Abstract excerpt
The sigmoidal dependence of activity on substrate concentration exhibited by the regulatory enzyme aspartate transcarbamoylase (ATCase) of Escherichia coli is generally attributed to a ligand-promoted change in the quaternary structure of the enzyme. Although a global conformational change in ATCase upon the binding of ligands to some of the six active sites is well documented, a corresponding alteration in the...
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