Model spectra of organic phosphate-U(VI) and sulfurU(VI) complexes: a study of P k-edge and S k-edge XANES

Phoshorylation of serine threonine and tyrosine residues, oxidation of methionine residues and sulfation on the sugar residues are common post translational modification to proteins. And study of protein-U(VI) interaction at mo-lecular level deepens the knowledge of U(VI) influence in the biosphare. P/S k-edge XANES were applied in the protein-U(VI) complexation in order to detect the tiny amount of phosphate-/sulfoxide-/sulfate-U(VI) com-plexes. In this study, model spectra were set up using phosvitin-U(VI), DMSO-U(VI) and sulfate-U(VI) for phosphate-/ sulfoxide-/sulfate-U(VI) complexes, respec-tively. Spectra features to represent the U(VI) complexa-tion have been found.