Ekaterina V. Sokerina · G. Matthias Ullmann · Gertie van Pouderoyen · Gerard W. Canters · Nenad M. Kostic

Electrostatic effects on the kinetics of photoinduced electron-transfer reactions of the triplet state of zinc cytochrome c with wild-type and mutant forms of Pseudomonas aeruginosa azurin

JBIC (1999) 4: 111–121

Table S1 Properties of cupriazurin variants at pH 7.0 (PDF 8KB)

Table S2 The root mean square values for different structures of azurin (Å) (PDF 7KB)

Table S3 Dipole moments of cupriazurin variants for the individual structures at pH 5.5 and 9.0 (PDF 17KB)

Table S4 Fitting to Eq. 4 of the dependence on ionic strength of the rate constant k_bim for the reaction of ³Zncyt (R₂=18.5 Å, Z₂=6, P₂=281 D, and q₂=30°) with cupriazurin variants (R₁=19.1 Å) (PDF 12KB)

Table S5 Interaction energies between ³Zncyt and cupriazurin variants, obtained by fitting to Eq. 11 the dependence of k_bim on ionic strength (PDF 5KB)

Table S6 Fitting to Eq. 11 of the dependence on ionic strength of the rate constant k_bim for the reaction of ³Zncyt (R₂=18.5 Å, z₂=3, P₂=281 D, and q₂=30º) with cupriazurin variants (R₁=19.1 Å, z₁=0), with the radius of the interaction domain set at r=7.0 Å) (PDF 8KB)

Table S7 Fitting to Eq. 11 of the dependence on ionic strength of the rate constant for the reaction of ³Zncyt (R₂=18.5 Å, z₂=3, P₂=281 D, and q₂2=30º) with cupriazurin variants (R₁=19.1 Å, local charge is equal to the charge of the hydrophobic patch) (PDF 11KB)

Fig. S1 Natural decay (upper trace) and quenching (lower trace) of ³Zncyt in a sodium phosphate buffer at pH 7.0 and ionic strength of 30 mM. The quencher in the latter case is the Met64Glu mutant of cupriazurin in a concentration of 70.0 mM (PDF 19KB)

Fig. S2 Appearance and disappearance of the cation radical Zncyt⁺, monitored at 675 nm, in a solution containing 10.0 mM zinc cytochrome c and 50.0 mM wild-type cupriazurin in phosphate buffer at pH 7.0, ionic strength of 100 mM, and 25 °C. The estimated yield of the cation radical Zncyt⁺ in this experiment was 55±20% (PDF 61KB)

Fig. S3 Total electrostatic energy of the collisional complex ³Zncyt/az(II) at various angles q₁ calculated according to [54] (PDF 25KB)

Fig. S4 Dependence on ionic strength of the bimolecular rate constants, k_bim, for the reaction of ³Zncyt with azurin variants. The solid curves are fittings to Eq. 8 with one energy term V_ii. The dotted curves are fittings to Eq. 11 with the complete set of three energy terms: V_ii, V_id, and V_dd (PDF 26KB)