3I5X

Structure of Mss116p bound to ssRNA and AMP-PNP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of the Yeast DEAD box protein Mss116p reveals two wedges that crimp RNA

Del Campo, M.Lambowitz, A.M.

(2009) Mol Cell 35: 598-609

  • DOI: 10.1016/j.molcel.2009.07.032
  • Primary Citation of Related Structures:  
    3I5X, 3I5Y, 3I61, 3I62

  • PubMed Abstract: 
  • The yeast DEAD box protein Mss116p is a general RNA chaperone that functions in mitochondrial group I and II intron splicing, translational activation, and RNA end processing. Here we determined high-resolution X-ray crystal structures of Mss116p com ...

    The yeast DEAD box protein Mss116p is a general RNA chaperone that functions in mitochondrial group I and II intron splicing, translational activation, and RNA end processing. Here we determined high-resolution X-ray crystal structures of Mss116p complexed with an RNA oligonucleotide and ATP analogs AMP-PNP, ADP-BeF(3)(-), or ADP-AlF(4)(-). The structures show the entire helicase core acting together with a functionally important C-terminal extension. In all structures, the helicase core is in a closed conformation with a wedge alpha helix bending RNA 3' of the central bound nucleotides, as in previous DEAD box protein structures. Notably, Mss116p's C-terminal extension also bends RNA 5' of the central nucleotides, resulting in RNA crimping. Despite reported functional differences, we observe few structural changes in ternary complexes with different ATP analogs. The structures constrain models of DEAD box protein function and reveal a strand separation mechanism in which a protein uses two wedges to act as a molecular crimper.


    Related Citations: 
    • Crystallization and preliminary X-ray diffraction of the DEAD-box protein Mss116p complexed with an RNA oligonucleotide and AMP-PNP
      Del Campo, M., Lambowitz, A.M.
      (2009) Acta Crystallogr Sect F Struct Biol Cryst Commun 65: 832

    Organizational Affiliation

    Institute for Cellular and Molecular Biology, University of Texas at Austin, 78712, USA.



Macromolecules

Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ATP-dependent RNA helicase MSS116A563Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MSS116YD9346.05CYDR194C
EC: 3.6.1 (PDB Primary Data), 3.6.4.13 (UniProt)
Find proteins for P15424 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P15424 
Go to UniProtKB:  P15424
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 2
    MoleculeChainsLengthOrganismImage
    5'-R(*UP*UP*UP*UP*UP*UP*UP*UP*UP*U)-3'B10N/A
    Small Molecules
    Ligands 2 Unique
    IDChainsName / Formula / InChI Key2D Diagram3D Interactions
    ANP
    Query on ANP

    Download CCD File 
    A
    PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
    C10 H17 N6 O12 P3
    PVKSNHVPLWYQGJ-KQYNXXCUSA-N
     Ligand Interaction
    MG
    Query on MG

    Download CCD File 
    A
    MAGNESIUM ION
    Mg
    JLVVSXFLKOJNIY-UHFFFAOYSA-N
     Ligand Interaction
    Experimental Data & Validation

    Experimental Data

    • Method: X-RAY DIFFRACTION
    • Resolution: 1.90 Å
    • R-Value Free: 0.225 
    • R-Value Work: 0.191 
    • R-Value Observed: 0.192 
    • Space Group: P 21 21 2
    Unit Cell:
    Length ( Å )Angle ( ˚ )
    a = 88.54α = 90
    b = 126.524β = 90
    c = 55.523γ = 90
    Software Package:
    Software NamePurpose
    HKL-2000data collection
    SHARPphasing
    REFMACrefinement
    HKL-2000data reduction
    HKL-2000data scaling

    Structure Validation

    View Full Validation Report



    Entry History 

    Deposition Data

    Revision History 

    • Version 1.0: 2009-09-08
      Type: Initial release
    • Version 1.1: 2011-07-13
      Changes: Advisory, Refinement description, Version format compliance