Alteration of conserved alternative splicing in AMELX causes enamel defects

E. S. Cho, K. J. Kim, K. E. Lee, E. J. Lee, C. Y. Yun, M. J. Lee, T. J. Shin, H. K. Hyun, Y. J. Kim, S. H. Lee, H. S. Jung, Z. H. Lee, J. W. Kim

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Tooth enamel is the most highly mineralized tissue in vertebrates. Enamel crystal formation and elongation should be well controlled to achieve an exceptional hardness and a compact microstructure. Enamel matrix calcification occurs with several matrix proteins, such as amelogenin, enamelin, and ameloblastin. Among them, amelogenin is the most abundant enamel matrix protein, and multiple isoforms resulting from extensive but well-conserved alternative splicing and postsecretional processing have been identified. In this report, we recruited a family with a unique enamel defect and identified a silent mutation in exon 4 of the AMELX gene. We show that the mutation caused the inclusion of exon 4, which is almost always skipped, in the mRNA transcript. We further show, by generating and characterizing a transgenic animal model, that the alteration of the ratio and quantity of the developmentally conserved alternative splicing repertoire of AMELX caused defects in enamel matrix mineralization.

Original languageEnglish
Pages (from-to)980-987
Number of pages8
JournalJournal of Dental Research
Issue number10
Publication statusPublished - 2014 Oct 1

Bibliographical note

Funding Information:
This work was supported by grants from the Bio & Medical Technology Development Program ( 2013037491 ), the Science Research Center to the Bone Metabolism Research Center ( 2008-0062614 ), and the Basic Science Research Program ( 2013R1A2A1A01007642 ) through the National Research Foundation of Korea.

Publisher Copyright:
© International & American Associations for Dental Research.

All Science Journal Classification (ASJC) codes

  • Dentistry(all)


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