6F4J

Crystal structure of Drosophila melanogaster SNF/U2A' complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.42 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.146 
  • R-Value Observed: 0.148 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Molecular principles underlying dual RNA specificity in the Drosophila SNF protein.

Weber, G.DeKoster, G.T.Holton, N.Hall, K.B.Wahl, M.C.

(2018) Nat Commun 9: 2220-2220

  • DOI: 10.1038/s41467-018-04561-6
  • Primary Citation of Related Structures:  
    6F4G, 6F4H, 6F4I, 6F4J

  • PubMed Abstract: 
  • The first RNA recognition motif of the Drosophila SNF protein is an example of an RNA binding protein with multi-specificity. It binds different RNA hairpin loops in spliceosomal U1 or U2 small nuclear RNAs, and only in the latter case requires the auxiliary U2A' protein ...

    The first RNA recognition motif of the Drosophila SNF protein is an example of an RNA binding protein with multi-specificity. It binds different RNA hairpin loops in spliceosomal U1 or U2 small nuclear RNAs, and only in the latter case requires the auxiliary U2A' protein. Here we investigate its functions by crystal structures of SNF alone and bound to U1 stem-loop II, U2A' or U2 stem-loop IV and U2A', SNF dynamics from NMR spectroscopy, and structure-guided mutagenesis in binding studies. We find that different loop-closing base pairs and a nucleotide exchange at the tips of the loops contribute to differential SNF affinity for the RNAs. U2A' immobilizes SNF and RNA residues to restore U2 stem-loop IV binding affinity, while U1 stem-loop II binding does not require such adjustments. Our findings show how U2A' can modulate RNA specificity of SNF without changing SNF conformation or relying on direct RNA contacts.


    Organizational Affiliation

    Helmholtz-Zentrum Berlin für Materialien und Energie, Macromolecular Crystallography, Albert-Einstein-Straße 15, D-12489, Berlin, Germany. mwahl@zedat.fu-berlin.de.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Probable U2 small nuclear ribonucleoprotein A'A, B176Drosophila melanogasterMutation(s): 3 
Gene Names: U2ACG1406
UniProt
Find proteins for Q9V4Q8 (Drosophila melanogaster)
Explore Q9V4Q8 
Go to UniProtKB:  Q9V4Q8
Entity Groups  
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UniProt GroupQ9V4Q8
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
U1 small nuclear ribonucleoprotein AC, D98Drosophila melanogasterMutation(s): 0 
Gene Names: snfD25fs(1)1621lizCG4528
UniProt
Find proteins for P43332 (Drosophila melanogaster)
Explore P43332 
Go to UniProtKB:  P43332
Entity Groups  
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UniProt GroupP43332
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.42 Å
  • R-Value Free: 0.193 
  • R-Value Work: 0.146 
  • R-Value Observed: 0.148 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.978α = 90
b = 53.763β = 103.09
c = 75.839γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-06-20
    Type: Initial release