Add time:08/24/2019         Source:sciencedirect.com

stellacyanin (cas 12738-61-3) from Rhus vernificera is a blue copper protein in which the metal is coordinated to a Cys, two His and a Gln residue. We have studied the Ni(II) derivative of stellacyanin by paramagnetic 1H NMR spectroscopy. The NMR spectrum resembles that of Ni(II) Met121Gln azurin, indicating a similar coordination environment. The hyperfine signals were assigned by means of 1D and 2D NOE spectroscopy. Evidence is obtained which indicates that the Gln residue is bound to the metal through its oxygen atom.

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