ISSN:
0006-3525
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The chemical and biological properties of collagen are altered by the biosynthetic substitution of the L-azetidine-2-carboxylic acid (Aze) residue in the place of proline. The reasons for this alteration have been studied by means of conformational energy computations on single- and triple-stranded structures formed by poly (GIy-X-Y) poly(tripeptide)s, where X and Y can be Pro or Aze. The most stable triple helix formed by Poly (Gly-Pro-Aze) is collagen-like, but all low-energy triple helices that can be formed by poly (Gly-Aze-Pro) and poly (Gly-Aze-Aze) are very different from collagen. Thus, the regular substitution of Aze for Pro in position X is not compatible with the collagen structure. In the absence of solvent effects, all of these triple helices are stable, relative to the statistical coil, but the substitutions reduce the stability of the collagen-like triple helix, as compared with poly (Gly-Pro-Pro).
Additional Material:
5 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bip.360300911
