Table S1.

Summary of biHis sites in NuG2b

LocationSiteMutationψ0*ϕbiHisΔΔGeqMetalΔΔGeqbiHisΔΔGfMetalm0m0MetalβTβTMetalMetal
WT1.29(7)0.78(5)
β1 + β2aV7H/T16H1.45(15)0.67(7)0.90(11)−1.91(18)0.83(5)1.52(3)1.38(5)0.72(2)0.81(4)Ni2+
bV9H/T14H1.65(23)0.89(9)0.81(6)−1.21(13)1.01(3)1.48(2)1.32(4)0.78(2)0.71(4)Zn2+
αcK29H/Q33H0.26(3)0.47(6)0.92(6)−1.42(19)0.40(4)1.27(4)§1.29(4)0.73(3)0.73(3)Zn2+
β3 + β4dT45H/T54H0.36(5)0.38(6)0.97(6)−1.13(14)0.55(3)1.37(4)§1.30(5)0.72(3)0.71(3)Zn2+
eD47H/T52H0.80(2)0.39(2)−1.08(6)−2.84(13)−0.65(5)1.46(4)1.41(5)0.85(1)0.88(1)Zn2+
β1 + β4fK5H/T52H−0.14(3)0.32(2)0.70(4)−2.55(13)−0.22(3)1.33(3)1.35(2)0.74(2)0.72(2)Zn2+
gV7H/T54H0.02(0)0.31(3)2.27(5)−2.22(15)0.35(3)1.37(3)§1.51(3)0.70(2)0.73(3)Zn2+
hV9H/T56H0.28(2)0.55(12)1.27(3)−0.78(17)0.67(2)1.52(3)§1.45(3)0.68(1)0.66(1)Zn2+
αiA25H/K29H0.19(9)0.63(17)1.84(24)−0.85(28)0.98(7)1.29(12)§1.25(13)0.61(7)0.59(7)Ni2+
jQ33H/D37H0.15(2)0.30(7)2.00(8)−0.83(15)1.00(4)1.45(5)§1.50(5)074(3)0.75(3)Ni2+
β1 + β4kV9H/T54H0.79(15)ND0.85(12)−0.06(9)0.75(6)1.23(3)§,1.23(3)0.81(0)0.81(0)Zn2+
lV7H/T56H0.84(6)0.57(6)−0.60(7)−1.72(19)−0.46(4)1.47(3)1.57(6)0.73(2)0.79(2)Ni2+
β2 + αmY17H/Y34H0.22(3)0.74(12)1.60(7)−1.65(25)0.85(4)1.35(4)§1.25(4)0.73(3)0.71(3)Zn2+
  • Values in parentheses represent SEs of the fitting and derived parameters, e.g., 1.45(15) = 1.45 ± 0.15. ND, not determined.

  • * ψ0 value is calculated directly in the fit of the chevron data that includes data for strongly folding and unfolding condition, xf and xu, respectively (Fig. S4).

  • βT = mf/m0, where mf and m0 are the denaturant dependences of the ΔGf and ΔGeq, respectively (Materials and Methods).

  • § mu is a shared parameter.

  • mf is a shared parameter.

  • mu is set to the value obtained from fitting the chevron in the absence of metal ions.