Preferred fibril architecture is also stabilized by tight van der Waals (vdW) packing between β-sheets.
Van Itallie, C. M., Fanning, A. S., Bridges, A. & Anderson, J. M. ZO-1 stabilizes the tight junction solute barrier through coupling to the perijunctional cytoskeleton.
Collectively, these non-covalent interactions between the two loops stabilize a tight bend in the backbone of the protein to form the loop containing amino acids 90 93.
The second group includes the side-chains of residues His-185, Gln-188 and Asp-189 which stabilize a tight β7- β8 turn at the top of loop B. Our homology models predict that amino acid substitutions in this region would disrupt this hydrogen bonding network (Fig. 5, E – H ).
We report here that after refitting and further refinement of the previous 2 A structure of SOD2, analysis of the new model and its calculated molecular surface shows an extensive surface topography of sequence-conserved residues stabilized by underlying tight packing and H-bonding.
In order to hold many acroyoga poses or move through many acroyoga combinations it is necessary to move fluidly from one "tight" stabilized core neutral position to the next.
Also the active state of Abl is stabilized by a tight contact of the SH2 domain with the upper kinase lobe [ 35].
In particular, we identify a self-stabilized tight water pentagon at the level of residue Ser6'.
Namely, as shown in the models below, the "ball" end is found to form a tight loop stabilized by a Hydrogen bond between Met1 and Glu9, whereas the more flexible hydrophilic, Arg-rich, tail (residues 13-to-20 13-to-20 13-to-20a turn between Ser16 and Asp19-Arg20 that also attraclusters3.
The spatial and temporal control of Eco1 would ensure that only the proper tethers are stabilized, allowing a very tight regulation for cohesion establishment in sister chromatid cohesion.
