To exclude the possibility that structural changes in addition to the removal of the Arg85 side chain play a role in the changes in binding stability, we determined the structures of the IL-4 variants R85A, T13D-R85A and F82D-R85A.
The sulfur-containing phenyl ring of COX-2-selective NSAIDs plays a pivotal role in binding stability by occupying the hydrophobic side pocket characteristic of the COX-2 catalytic site.
Another possibility is that the liver toxicity caused by erb-38 could be due to different clearance in the liver, the binding stability of the toxin moiety, or the difference in the binding epitopes of the two antibodies.
They found that the water molecule W301 within the binding pocket of bound complex plays crucial roles in the binding stability of inhibitors.
However, the quantitative relationships between the gene expression and the binding stability (koff) or affinity (KD) were complex in these cell-based assays, because the protein concentrations were hard to be determined in cells.
Interestingly, the electrostatic potential surface charge distribution on the primase binding surface of helicases show major striking differences in different organisms which may be responsible for the differences in binding stability of DnaB-DnaG complex (Figure 5B).
This is supported by low total energy value of docking system, formation of two H-bonds with HCV NS3 protease active site residues, high binding affinity and increased stability in the interaction system.
In order to verify binding stability, aptamers were incubated with the target at 37°C, and fluorescence intensity was determined by flow cytometry.
If the many molecular similarities in TF binding between flies and human are attributed to the shared biochemistry behind protein-DNA contacts, then what drives the profound differences in TF binding stability between species?
Further biochemical properties of the GBPs are the low binding affinity to nucleotides, their stability in the absence of guanine nucleotides and their high turnover GTPase activity [ 10].
