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Cited by 193

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Evidence for Procollagen, a Biosynthetic Precursor of Collagen

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Bellamy, Garland, Bornstein, Paul·1971·Proceedings of the National Academy of Sciences

Abstract

Incubation of rat calvaria for short times in the presence of a labeled amino acid revealed the existence of a collagen fraction (procollagen) that functions as a biosynthetic precursor of collagen. Procollagen contains an α1-like chain (pre-α1) that elutes earlier from CM-cellulose than does rat-bone α1 and has a molecular weight, estimated by acrylamide gel electrophoresis, of 120,000. A time-dependent conversion of pre-α1 to α1 was demonstrated by incubation of calvaria for periods varying from 9 to 60 min and by a pulse-chase experiment. Limited cleavage of procollagen with pepsin resulted in a molecule with a chain resembling α1 in chromatographic properties, molecular weight, and relative hydroxyproline and proline contents. Thus, conversion of procollagen to collagen is likely to occur in vivo by a proteolytic mechanism. The additional peptide sequences in procollagen may serve to initiate chain association in triple-helix formation, to facilitate molecular transport, and to inhibit intracellular fibrogenesis.

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Metadata

Authors
Bellamy, G., & Bornstein, P.
Venue
Proceedings of the National Academy of Sciences
Published
1971-06
Volume
68
Issue
6
Pages
1138-1142
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2084287360
Cited by
193
References
1
FWCI
33.03
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Evidence for Procollagen, a Biosynthetic Precursor of Collagen. https://app.cochat.ai/papers/10.1073/pnas.68.6.1138
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Bellamy, G., & Bornstein, P. (1971). Evidence for Procollagen, a Biosynthetic Precursor of Collagen. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.68.6.1138

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