These latter residues, which are key to binding the benzyl modification of high affinity inhibitors such as BAU, are also the only distinguishing active site residues when comparing eukaryotic and prokaryotic enzymes (equivalent E. coli residues are Ile 220, Val221 and P229).
Strong Hg/Se binding may be key to understanding the biological and environmental behavior of both mercury and selenium (38– 40).
This suggests additional complexity in TOX3 gene regulation, where a narrow range of FOXA1 binding may be key to appropriate enhancer function.
This observation suggested that the S2 to S4 segments are key to capsaicin binding, while the remaining gating machinery required for capsaicin activation is preserved in both channels.
A different possible role for T426, however, is that this threonine acts to stabilize/modulate the phosphorylation on S431 and thereby regulates the phospho-S431 site that is key to the binding of KaiB and subsequent steps in the dephosphorylation sequence [26], [27].
The importance of these additional Ets interaction partners merits structural study, as some interfaces appear to be novel and even if such surfaces appear similar to those already characterized, subtle residue movements are key to co-operative binding on DNA [ 11, 12].
The analysis of sequence differences between RAMP1 from these species, followed by associated site-directed mutagenesis studies, revealed that Trp-74Trp-74man RAMP1 is key to the high-affinity binding of BIBN4096BS [12].
The thermodynamic and structural changes that accompany cooperative protein−DNA binding are key to the recognition, bending, and unwinding of DNA sites during transcription and replication but are still poorly understood.
Work by Kooijman et al. [ 27] revealed that the charge state of the phosphomonoester in PA, compared to that of other anionic lipids, is key to achieving specificity in effector binding.
From the above it also directly follows that it is key to find out about PRC2 binding at the bx, bxd and abd-A PREs in PS7 (Point 1).
