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ADAM interact with large protein complexes to regulate Histone modification, gene expression and splicing.

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    Adam13, a metalloprotease, regulates cranial neural crest (CNC) cell gene expression by influencing histone modifications. This is crucial for facial development and CNC cell migration.

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    Area of Science:

    • Developmental Biology
    • Molecular Biology
    • Genetics

    Background:

    • Cranial neural crest (CNC) cells are vital stem cells for vertebrate facial development.
    • ADAM (A Disintegrin And Metalloprotease) proteins are critical for CNC cell induction and migration.
    • Previous work established Adam13's association with transcription factor Arid3a for gene regulation.

    Purpose of the Study:

    • To investigate Adam13's role in modulating histone modifications within CNC cells.
    • To elucidate the mechanism by which Adam13 influences Arid3a binding and gene expression.
    • To understand the impact of Adam13 on RNA splicing and its implications for CNC migration.

    Main Methods:

    • Analysis of histone modifications in CNC cells.
    • Investigation of Arid3a binding to the tfap2α promoter in the presence and absence of Adam13.
    • Assessment of gene expression, focusing on CNC migration-critical genes and tfap2α variants.
    • Co-immunoprecipitation assays to identify proteins associated with Adam13 and ADAM9 involved in histone modification and RNA splicing.

    Main Results:

    • Adam13 was found to modulate histone modifications in CNC cells.
    • Arid3a binding to the tfap2α promoter requires Adam13, promoting a CNC-specific tfap2α variant.
    • This tfap2α variant activates genes essential for CNC migration.
    • Adam13 and ADAM9 associate with proteins involved in histone modification and RNA splicing, a process impaired upon Adam13 loss.

    Conclusions:

    • Adam13 plays a significant role in regulating gene expression in CNC cells through histone modification.
    • The Adam13-Arid3a interaction is critical for tfap2α expression, driving CNC migration.
    • ADAM proteins may function as extracellular sensors that influence chromatin accessibility and gene/RNA splicing regulation.