Amino and carboxyl propeptides in bone collagen fibrils during embryogenesis (original) (raw)

Summary

Collagen fibrillogenesis was studied in tibiae of chick embryos, 9, 11, and 14 days old. Specimens were incubated with antibodies against the amino and the carboxyl propeptides of type-I collagen and subjected to ferritin-la-belling immuno-electron microscopy. The amino propeptide was found in thin fibrils, 20–40 nm in diameter, distributed at 60-nm periodicity. The carboxyl propeptide antibody labelled a wide spectrum of fibrils, although the majority were in the range of 40–100 nm, distinctly larger than those labelled with the amino propeptide antibody. The presence of pN (amino propeptide plus collagen) and pC (carboxyl propeptide plus collagen) collagen was also demonstrated by Western blotting in all specimens. This study suggests that the sequence of propeptide removal may regulate collagen fibril diameter.

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Authors and Affiliations

1. Department of Dermatology, Mount Sinai School of Medicine, New York, NY, USA
   Raul Fleischmajer & Jerome S. Perlish
2. Department of Anatomy and Cellular Biology, Harvard Medical School, Boston, MA, USA
   Bjorn R. Olsen

Authors

1. Raul Fleischmajer
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2. Jerome S. Perlish
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3. Bjorn R. Olsen
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Fleischmajer, R., Perlish, J.S. & Olsen, B.R. Amino and carboxyl propeptides in bone collagen fibrils during embryogenesis.Cell Tissue Res. 247, 105–109 (1987). https://doi.org/10.1007/BF00216552

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• Accepted: 02 May 1986
• Issue Date: January 1987
• DOI: https://doi.org/10.1007/BF00216552

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