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Mechanism of the activation of proteinase inhibitor synthesis by systemin involves beta-sheet structure, a specific DNA-binding protein domain

Slósarek, G. ; Kalbitzer, Hans Robert ; Mucha, P. ; Rekowski, P. ; Kupryszewski, G. ; Giel-Pietraszuk, M. ; Szymański, M. ; Barciszewski, J.


We analyzed a tertiary structure of systemin, the first identified polypeptide plant hormone, using two-dimensional NMR spectroscopy. From these data and molecular dynamics calculations we concluded that the peptide can adopt a Z-like-beta-sheet structure, which has previously been found in many specific DNA-binding proteins. Using DNA-cellulose affinity chromatography, we showed that systemin ...


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