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Lamiable, O., Rabhi, M., Peronnet, F., Locker, D., Decoville, M. (2010). Rm62, a DEAD-box RNA helicase, complexes with DSP1 in Drosophila embryos.  genesis 48(4): 244--253.
FlyBase ID
FBrf0210563
Publication Type
Research paper
Abstract

Two main classes of proteins, Polycomb group (PcG) and Trithorax group (TrxG), play a key role in the regulation of homeotic genes. These proteins act in multimeric complexes to remodel chromatin. A third class of proteins named Enhancers of Trithorax and Polycomb (ETP) modulates the activity of TrxG and PcG, but their role remains largely unknown. We previously identified an HMGB-like protein, DSP1 (Dorsal Switch Protein 1), which was classified as an ETP. Preliminary studies have revealed that DSP1 is involved in multimeric complexes. Here we identify a DEAD-box RNA helicase, Rm62, as partner of DSP1 in a 250-kDa complex. Coimmunoprecipitation assays performed on embryo extracts indicate that DSP1 and Rm62 are associated in 3- to 12-h embryos. Furthermore, DSP1 and Rm62 colocalize on polytene chromosomes. Consistent with these results, a mutation in Rm62 enhances a null mutation of dsp1 and also mutations of trxG or PcG, suggesting that Rm62 has characteristics of an ETP. We show here for the first time that an RNA helicase is involved in the maintenance of homeotic genes.

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    Language of Publication
    English
    Additional Languages of Abstract
    Parent Publication
    Publication Type
    Journal
    Abbreviation
    genesis
    Title
    genesis
    Publication Year
    2000-
    ISBN/ISSN
    1526-954X 1526-968X
    Data From Reference
    Alleles (8)
    Genes (6)
    Physical Interactions (3)
    Natural transposons (1)
    Experimental Tools (2)
    Transgenic Constructs (2)