Despite considerable efforts we were not able to generate estimates of affinities of metal-ions to proteins using the commands described in the documentation of the software; we suspect that the option in those versions of the software is dysfunctional.
In this step the interactions of each snapshot of FFR model and the ligand are evaluated and estimates of their affinity are calculated and expressed in terms of their free energy of binding (FEB).
As with porphyrin 1, binding assays in solution gave estimates of the affinity of palladium II) for membrane-bound 3, confirming that membrane-spanning dimeric complexes should form at these concentrations.
Our binding affinity results obtained from insertion and deletion are very similar indicating that our simulations are well converged and that accurate estimates of binding affinities were obtained.
Förster resonance energy transfer (FRET) extended our ability to identify protein-protein and protein-nucleic acid interactions on a scale of tens of nanometers and facilitated estimates of binding affinities and stoichiometries [24].
The fact that both insertion and deletion give very similar results strongly suggests that our simulations are well converged and that accurate estimates of binding affinities have been obtained.
This circumstance complicates the analysis of these data for quantitative estimates of the affinities.
(A ) Summary of NMR binding assays of N-labeled NPF fragments probed with ChiLS; +–+++, estimates of binding affinities, based on minimal ChiLS concentrations required for line-broadening; −, no binding (see also Figure 4 ); top, preferred NPF context in strong binders (numbering of positions as in de Beer et al., 2000 ).
On the other hand, CFT can be combined with an estimate of the affinity of the drug for its target (KD), obtained from suitable in vitro or pre-clinical studies, to obtain an estimate of target occupancy.
The binding of the CnA-CBD to CaM was analyzed by isothermal titration calorimetry (ITC), in order to get an accurate estimate of the affinity and thermodynamic parameters of binding (Figure 2A, Table 2).
