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Rudolph, T., Yonezawa, M., Lein, S., Heidrich, K., Kubicek, S., Schafer, C., Phalke, S., Walther, M., Schmidt, A., Jenuwin, T., Reuter, G. (2007). Heterochromatin Formation in Drosophila Is Initiated through Active Removal of H3K4 Methylation by the LSD1 Homolog SU(VAR)3-3.  Mol. Cell 26(1): 103--115.
FlyBase ID
FBrf0204799
Publication Type
Research paper
Abstract
Epigenetic indexing of chromatin domains by histone lysine methylation requires the balanced coordination of methyltransferase and demethylase activities. Here, we show that SU(VAR)3-3, the Drosophila homolog of the human LSD1 amine oxidase, demethylates H3K4me2 and H3K4me1 and facilitates subsequent H3K9 methylation by SU(VAR)3-9. Su(var)3-3 mutations suppress heterochromatic gene silencing, display elevated levels of H3K4me2, and prevent extension of H3K9me2 at pericentric heterochromatin. SU(VAR)3-3 colocalizes with H3K4me2 in interband regions and is abundant during embryogenesis and in syncytial blastoderm, where it appears concentrated at prospective heterochromatin during cycle 14. In embryos of Su(var)3-3/+ females, H3K4me2 accumulates in primordial germ cells, and the deregulated expansion of H3K4me2 antagonizes heterochromatic H3K9me2 in blastoderm cells. Our data indicate an early developmental function for the SU(VAR)3-3 demethylase in controlling euchromatic and heterochromatic domains and reveal a hierarchy in which SU(VAR)3-3-mediated removal of activating histone marks is a prerequisite for subsequent heterochromatin formation by H3K9 methylation.
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Note
A two-way street: LSD1 regulates chromatin boundary formation in S. pombe and Drosophila.
Chosed and Dent, 2007, Mol. Cell 26(2): 160--162 [FBrf0202005]
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Secondary IDs
    Language of Publication
    English
    Additional Languages of Abstract
    Parent Publication
    Publication Type
    Journal
    Abbreviation
    Mol. Cell
    Title
    Molecular Cell
    Publication Year
    1997-
    ISBN/ISSN
    1097-2765 1097-4164
    Data From Reference