Single nucleotide polymorphisms (SNPs) within miRNAs or miRNA binding sites can alter mRNA stability or translation and, thereby, result in various pathological processes including malignant transformation (Calin et al, 2004; Esquela-Kerscher & Slack, 2006; Yang et al, 2008).
Moreover, the 3D location of substituted amino acids shed light on the implied impact on the protein's function: An exchange of buried residues may, for example, affect protein stability and folding, whereas mutations located on the protein surface, close to putative binding sites can alter binding affinities.
In contrast to the situation described above, where quantitative changes in binding proteins bring about changes in total but not free TH concentrations, the presence of agents in serum that are capable of displacing T4 and T3 from their binding sites can alter hormone delivery and clearance and distort diagnostic tests for FT4 and FT3.
Thus, for proteins with multiple conformations that are close in energy, such as many intrinsically disordered proteins, residues distant from the active site can alter both binding affinity and specificity.
Binding of ligands to non-GABA sites can alter communication between different binding sites and affect the receptor's conformation in ways that stimulate or inhibit its function (allosteric modulation).
Allosteric modulators bind to regions that are distinct to the orthosteric binding site and can alter agonist sensitivity, agonist efficacy and channel kinetics.
There are examples of highly conserved regulatory sequences with a conserved function but binding sites can also appear, disappear, or alter their sequence even between relatively closely related species; see, e.g., refs. [ 18- 22].
Because the cadCBA regulon is located close to the origin (oriC 84 min, cadBA promoter 93 min25) in E. coli, the number of the CadC-binding sites can be altered by controlling the doubling time of cells.
Our studies demonstrate how distinct binding sites can be differentially affected by the tradeoffs between enhancing ligand occupancy upon cryocooling and altering the population of higher energy conformational states that can present new ligand-binding sites.
Individual binding sites can be observed via the green FitCons2 class 40 (ρ = 0.43).
