Title : A stereoelectronic effect on turn formation due to proline substitution in elastin-mimetic polypeptides.

Pub. Date : 2005 Dec 28

PMID : 16366565






4 Functional Relationships(s)
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1 A stereoelectronic effect on turn formation due to proline substitution in elastin-mimetic polypeptides. Proline elastin Homo sapiens
2 Calorimetric and spectroscopic investigations of these three polypeptides indicate that the incorporation of the substituted proline residues had a dramatic effect upon the self-assembly of the corresponding elastin peptide. Proline elastin Homo sapiens
3 These results suggest that stereoelectronic effects could either enhance or hinder the self-assembly of elastin-mimetic polypeptides, depending on the influence of the proline analogue on the energetics of the beta-turn conformation that develops within the pentapeptide structural repeats above the phase transition. Proline elastin Homo sapiens
4 The results of the these calculations suggested a similar outcome to the experimental data for the elastin-mimetic polypeptides, in that type II beta-turn structures were stabilized for peptide segments containing (2S,4R)-fluoroproline and destabilized for segments containing (2S,4S)-fluoroproline relative to the canonical proline residue. Proline elastin Homo sapiens