title: Binding site of Zn2+ in ATP:N1 at low pH and N7 at high pH as evidenced by 1H-15N NMR HMBC experiments.
abstract: Nuclear magnetic resonance (NMR) 1H-15N heteronuclear multiple bond correlation (HMBC) experiments on natural abundant adenosine-5'-triphosphate (ATP) showed that zinc(II) induced large chemical shifts (> 10 ppm) for N1 at lower pH (2-5) while for N7 at higher pH (5-7), suggesting that the binding site of Zn2+ in the purine base of ATP is pH dependent. The size effect of zinc(II) in coordination is also discussed.
authors.affiliation: Laboratory of Magnetic Resonance and Atomic Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, People's Republic of China.
authors.forename: F
authors.initials: F
authors.lastname: Du
authors.forename: X A
authors.initials: XA
authors.lastname: Mao
mesh_terms: D000255:Adenosine Triphosphate / Q000737:chemistry* / Q000378:metabolism*; D001665:Binding Sites; D006859:Hydrogen; D006863:Hydrogen-Ion Concentration; D009682:Magnetic Resonance Spectroscopy / Q000379:methods*; D009587:Nitrogen Isotopes; D015032:Zinc / Q000378:metabolism*
chemical_list: D009587:Nitrogen Isotopes; D006859:Hydrogen; D000255:Adenosine Triphosphate; D015032:Zinc