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Published June 2021 | Accepted Version + Supplemental Material
Journal Article Open

Minimal Amelogenin Domain for Enamel Formation

Abstract

Amelogenin is the most abundant matrix protein guiding hydroxyapatite formation in enamel, the durable bioceramic tissue that covers vertebrate teeth. Here, we sought to refine structure-function for an amelogenin domain based on in vitro data showing that a 42-amino acid amelogenin-derived peptide (ADP7) mimicked the formation of hydroxyapatite similar to that observed for the full-length mouse 180-amino acid protein. In mice, we used CRISPR-Cas9 to express only ADP7 by the native amelogenin promoter. Analysis revealed ADP7 messenger RNA expression in developing mouse teeth with the formation of a thin layer of enamel. In vivo, ADP7 peptide partially replaced the function of the full-length amelogenin protein and its several protein isoforms. Protein structure–function relationships identified through in vitro assays can be deployed in whole model animals using CRISPR-Cas9 to validate the function of a minimal protein domain to be translated for clinical use as an enamel biomimetic.

Additional Information

© 2021 The Minerals, Metals & Materials Society. Received 30 December 2020; Accepted 31 March 2021; Published 07 May 2021. Discussions with colleagues were instructive and appreciated. The comments of the three anonymous reviewers served to improve the manuscript and we are grateful for their guidance. The authors declare that they have no conflicts of interest.

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Accepted Version - nihms-1714796.pdf

Supplemental Material - 11837_2021_4687_MOESM1_ESM.pdf

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Created:
August 20, 2023
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October 23, 2023