Protein ROA spectra provide information on secondary and tertiary structures of polypeptide backbones, backbone hydration, and side chain conformations, and on structural elements present in unfolded states.
In addition, new insights into the structural elements present in unfolded protein sequences, and the structure of the protein and nucleic acid components of intact viruses can be obtained.
In SY5Y-APP clone, p53 is mainly present in unfolded conformation, as showed by using two-specific conformational antibodies that discriminate folded (PAb1620) versus unfolded (PAb240) p53 state.
The thapsigargin-induced autophagy was still present in unfolded protein response (UPR -deficient cells, sUPR -deficientn a direcellsvolvement of Ca2+ in the induction of autophagy.
It has been investigated that protein molecules in such denaturing solvents quickly lost the tertiary and secondary structures, presenting as unfolded or partially unfolded configurations (Desai and Klibanov 1995; Xu et al. 1997).
Results are here presented in unfolded fraction units which are calculated from each spectra assuming than at time zero the elipticity recorded corresponds to the fully folded protein while at 200 h this parameter agrees with a totally unfolded state.
This is in line with the previous results, and moreover some residual structures were suggested to be present in the unfolded state.
Transient long-range contacts, both native-like and non-native-like, have previously been shown to be present in the unfolded state of the four-helix-bundle protein acyl co-enzyme binding protein (ACBP) as seen from both perturbations in nuclear magnetic resonance (NMR) chemical shifts and structural ensembles generated from NMR paramagnetic relaxation data.
The resulting CSI plot generated for the α-carbons of residues 245 288 of Fe3+-HO2O clearly demonstrates that this C-terminal region is present as an unfolded and dynamic random coil.
In support of this scheme, half-cage structures with an upfield G11-CH2 group appear to be present within the unfolded ensemble of TC5b and other less stable Trp-cage analogues.
