Table I.

Thermodynamic properties of N-terminal mutations used, as determined by ITC

Protein interaction (cell + syringe) Kd ΔH −TΔS ΔG 
 nM kcal/mol kcal/mol kcal/mol  
ΔN complex + Syb1–96a 2.1 ± 0.6 −29.9 ± 0.3 18.1 −11.8 1.05 
ΔN complex + Syb F77A 0.8 ± 0.4 −18.8 ± 0.2 6.4 −12.4 0.99 
ΔN complex + Syb LATA 44.1 ± 12.3 −16.6 ± 0.4 6.5 −10.1 1.01 
ΔN complex + Syb VAVA 8.4 ± 2.8 −23.4 ± 0.4 12.3 −11.1 1.02 
Protein interaction (cell + syringe) Kd ΔH −TΔS ΔG 
 nM kcal/mol kcal/mol kcal/mol  
ΔN complex + Syb1–96a 2.1 ± 0.6 −29.9 ± 0.3 18.1 −11.8 1.05 
ΔN complex + Syb F77A 0.8 ± 0.4 −18.8 ± 0.2 6.4 −12.4 0.99 
ΔN complex + Syb LATA 44.1 ± 12.3 −16.6 ± 0.4 6.5 −10.1 1.01 
ΔN complex + Syb VAVA 8.4 ± 2.8 −23.4 ± 0.4 12.3 −11.1 1.02 

Kd, dissociation constant; ΔH, binding enthalpy; T, absolute temperature in Kelvin; ΔS, entropy change; ΔG, free energy; N, stoichiometry.

a

These data are from Wiederhold and Fasshauer (2009).

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