Molecular structure of polyglycine II

Normal vibrations of polyglycine II.

Identification and dynamics of polyglycine II nanocrystals in Argiope trifasciata flagelliform silk

Spider silks combine a significant number of desirable characteristics in one material, including large tensile strength and strain at breaking, biocompatibility, and the possibility of tailoring their properties. Major ampullate gland silk (MAS) is the most studied silk and their properties are explained by a double lattice of hydrogen bonds and elastomeric protein chains linked to polyalanine...

Normal vibrations of crystalline polyglycine I.

A valence force field has been refined for crystalline polyglycine I using its known antiparallel chain pleated-sheet structure and without replacing the CH, group by a point mass. Polyglycine I and four of its isotopic derivatives were used in the refinement. The calculated frequencies are in good agreement with the observed, except for the amide I modes. It is shown that this is a consequence...

The structure of polyglycine in a solvent free environment: A computational study

Each one of the twenty natural amino acids possesses a different propensity towards α-helix formation, with glycine at the bottom of the scale. In addition to this, the solvent can either stabilize or destabilize the three-dimensional structure of proteins. For this reason, globular proteins expose their polar residues to the surface whereas hydrophobic residues are kept at the protein interior...

Raman studies of solution polyglycine conformations.

Polyglycine (polygly) is an important model system for understanding the structural preferences of unfolded polypeptides in solution. We utilized UV resonance and visible Raman spectroscopy to investigate the conformational preferences of polygly peptides of different lengths in water containing LiCl and LiClO(4). Lithium salts increase the solubility of polygly. Our study indicates that in sol...