Type I collagen alpha-1 chain C-telopeptide: solution structure determined by 600-MHz proton NMR spectroscopy and implications for its role in collagen fibrillogenesis - PubMed (original) (raw)
. 1988 May 17;27(10):3560-7.
doi: 10.1021/bi00410a006.
Affiliations
- PMID: 3408712
- DOI: 10.1021/bi00410a006
Type I collagen alpha-1 chain C-telopeptide: solution structure determined by 600-MHz proton NMR spectroscopy and implications for its role in collagen fibrillogenesis
A Otter et al. Biochemistry. 1988.
Abstract
The solution conformation of the alpha-1 chain C-telopeptide has been studied by circular dichroism (CD) and 600-MHz 1H NMR spectroscopy in 60% CD3OH/40% H2O solution. The C-telopeptide contains 27 amino acids which form the C-terminal end of the alpha-1 collagen polypeptide chain. By the combined application of various two-dimensional, phase-sensitive NMR techniques (COSY, RELAY, NOESY, ROESY), a nearly complete assignment of all proton resonances was achieved. Furthermore, the backbone conformation could be established, on the basis of coupling constant and NOE data. The spectroscopic evidence indicates that large sections of the peptide exist in a nonrandom, extended conformation and that there are two segments of higher mobility around the two Gly-Gly units in positions 2,3 and 20,21. Despite these hingelike, flexible sections no measurable fold-back of any of the extended parts was evident. On the basis of this structure, a model is proposed for the simultaneous interaction of the C-telopeptide with two adjacent collagen triple helices within the growing collagen fibril.
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