Figure 5.
(A) Mg2+ binding rigidifies the TSase-(5F-dUMP)-CH2H4fol complex. Significant (greater than 2σ) differences in 15N-1H order parameters (ΔS2 = S2, Mg2+-S2, EDTA) are shown. (B) The significant changes in panel A are highlighted on a ternary complex structure with a color gradient of white to red representing minimal to maximal changes in S2. Residues with no significant change are colored in and the suggested binding site for Mg2+ is shown in green. Reproduced from ref [83] with permission from the American Chemical Society.