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  • 1
    Publication Date: 2006-08-26
    Description: In higher eukaryotes, a multiprotein exon junction complex is deposited on spliced messenger RNAs. The complex is organized around a stable core, which serves as a binding platform for numerous factors that influence messenger RNA function. Here, we present the crystal structure of a tetrameric exon junction core complex containing the DEAD-box adenosine triphosphatase (ATPase) eukaryotic initiation factor 4AIII (eIF4AIII) bound to an ATP analog, MAGOH, Y14, a fragment of MLN51, and a polyuracil mRNA mimic. eIF4AIII interacts with the phosphate-ribose backbone of six consecutive nucleotides and prevents part of the bound RNA from being double stranded. The MAGOH and Y14 subunits lock eIF4AIII in a prehydrolysis state, and activation of the ATPase probably requires only modest conformational changes in eIF4AIII motif I.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Andersen, Christian B F -- Ballut, Lionel -- Johansen, Jesper S -- Chamieh, Hala -- Nielsen, Klaus H -- Oliveira, Cristiano L P -- Pedersen, Jan Skov -- Seraphin, Bertrand -- Le Hir, Herve -- Andersen, Gregers Rom -- New York, N.Y. -- Science. 2006 Sep 29;313(5795):1968-72. Epub 2006 Aug 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Molecular Biology, University of Aarhus, DK-8000 Aarhus, Denmark.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/analogs & derivatives/metabolism ; Adenylyl Imidodiphosphate/metabolism ; Amino Acid Motifs ; Amino Acid Sequence ; Animals ; Crystallography, X-Ray ; DEAD-box RNA Helicases ; Dimerization ; Drosophila Proteins/chemistry/metabolism ; Eukaryotic Initiation Factor-4A/*chemistry/metabolism ; *Exons ; Humans ; Hydrogen Bonding ; Hydrolysis ; Models, Molecular ; Molecular Sequence Data ; Mutation ; Neoplasm Proteins/*chemistry/metabolism ; Nuclear Proteins/*chemistry/metabolism ; Nucleic Acid Conformation ; Poly U/*chemistry/metabolism ; Protein Conformation ; Protein Structure, Secondary ; Protein Structure, Tertiary ; RNA Helicases/chemistry/metabolism ; RNA, Messenger/*chemistry/metabolism ; RNA-Binding Proteins/*chemistry/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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