Solution structure of the RRM of SRp20 bound to the RNA CAUC

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 28 
  • Selection Criteria: structures with the least restraint violations 

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This is version 1.4 of the entry. See complete history


Molecular basis of RNA recognition and TAP binding by the SR proteins SRp20 and 9G8.

Hargous, Y.Hautbergue, G.M.Tintaru, A.M.Skrisovska, L.Golovanov, A.P.Stevenin, J.Lian, L.Y.Wilson, S.A.Allain, F.H.

(2006) EMBO J 25: 5126-5137

  • DOI: https://doi.org/10.1038/sj.emboj.7601385
  • Primary Citation of Related Structures:  
    2HVZ, 2I2Y, 2I38

  • PubMed Abstract: 

    The sequence-specific RNA-binding proteins SRp20 and 9G8 are the smallest members of the serine- and arginine-rich (SR) protein family, well known for their role in splicing. They also play a role in mRNA export, in particular of histone mRNAs. We present the solution structures of the free 9G8 and SRp20 RNA recognition motifs (RRMs) and of SRp20 RRM in complex with the RNA sequence 5'CAUC3'. The SRp20-RNA structure reveals that although all 4 nt are contacted by the RRM, only the 5' cytosine is primarily recognized in a specific way. This might explain the numerous consensus sequences found by SELEX (systematic evolution of ligands by exponential enrichment) for the RRM of 9G8 and SRp20. Furthermore, we identify a short arginine-rich peptide adjacent to the SRp20 and 9G8 RRMs, which does not contact RNA but is necessary and sufficient for interaction with the export factor Tip-associated protein (TAP). Together, these results provide a molecular description for mRNA and TAP recognition by SRp20 and 9G8.

  • Organizational Affiliation

    Institute of Molecular Biology and Biophysics, ETH Zurich, Zurich, Switzerland.


Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Fusion protein consists of immunoglobulin G-Binding Protein G and Splicing factor, arginine/serine-rich 3B [auth A]150Streptococcus sp. 'group GHomo sapiens
This entity is chimeric
Mutation(s): 0 
Gene Names: spg and SFRS3
UniProt & NIH Common Fund Data Resources
Find proteins for P84103 (Homo sapiens)
Explore P84103 
Go to UniProtKB:  P84103
GTEx:  ENSG00000112081 
Find proteins for P19909 (Streptococcus sp. group G)
Explore P19909 
Go to UniProtKB:  P19909
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP84103P19909
Sequence Annotations
  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 1
MoleculeChains LengthOrganismImage
(5'-R(*CP*AP*UP*C)-3')A [auth B]4N/A
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 28 
  • Selection Criteria: structures with the least restraint violations 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-12-12
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-03-09
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2024-05-29
    Changes: Data collection