Article
Biochemical and mass spectrometric evidence for quaternary structure modifications of plant threonine deaminase induced by isoleucine.
Biochemistry - 19 Nov 2002
Halgand Frédéric, Wessel Peter M, Laprévote Olivier, Dumas Renaud
Abstract excerpt
Arabidopsis thaliana threonine deaminase (TD) is a tetramer composed of identical approximately 59600 Da subunits. TD activity has been shown to be inhibited by isoleucine. This effect is reversed by a large excess of valine. Nondenaturant gel filtration, polyacrylamide gel electrophoresis, and mass spectrometry experiments demonstrated that binding of isoleucine on TD induces dimerization of the enzyme, whereas...
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