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. 1981 May;78(5):2879–2882. doi: 10.1073/pnas.78.5.2879

Regulation of collagen synthesis by ascorbic acid.

S Murad, D Grove, K A Lindberg, G Reynolds, A Sivarajah, S R Pinnell
PMCID: PMC319462  PMID: 6265920

Abstract

After prolonged exposure to ascorbate, collagen synthesis in cultured human skin fibroblasts increased approximately 8-fold with no significant change in synthesis of noncollagen protein. This effect of ascorbate appears to be unrelated to its cofactor function in collagen hydroxylation. The collagenous protein secreted in the absence of added ascorbate was normal in hydroxylysine but was mildly deficient in hydroxyproline. In parallel experiments, lysine hydroxylase (peptidyllysine, 2-oxoglutarate:oxygen 5-oxidoreductase, EC 1.14.11.4) activity increased 3-fold in response to ascorbate administration whereas proline hydroxylase (prolyl-glycyl-peptide, 2-oxoglutarate:oxygen oxidoreductase, EC 1.14.11.2) activity decreased considerably. These results suggest that collage polypeptide synthesis, posttranslational hydroxylations, and activities of the two hydroxylases are independently regulated by ascorbate.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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