Small molecules binding the target at the selected positions can be found using virtual high throughput screening of large chemical libraries.
Sequence-directed nucleosome positions can be further modulated by DNA binding proteins and chromatin remodelers [ 36].
For an evolutionary diverse superfamily such positions can be involved in its structure/function such as ligand-binding, provided an accurate MSA is used as an input.
DNA binding proteins fused to different versions of green fluorescent proteins permit visualization of individual loci, but only a few positions can be examined simultaneously.
Those positions can be onerous.
Generally, three positions can be distinguished.
Labeling experiments are very helpful if an accessible position can be identified for insertion of a binding site, for example, a unique cysteine for binding a derivatized gold particle, or fusion of a protein domain such as GFP.
This identified two hits with different pendant groups at C6, confirming that this position can be altered without a loss of binding.
These physical interactions among transcription factors must constrain how their binding sites can be positioned relative to each other and to the relevant promoters.
Therefore, when residues such as His or Cys are substituted into these positions, metal-binding sites can be formed.
