Macromolecule Content

• Total Structure Weight: 18.06 kDa 
• Atom Count: 1264 
• Modelled Residue Count: 154 
• Deposited Residue Count: 154 
• Unique protein chains: 1
• Unique nucleic acid chains: 1

2I2Y

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

• DOI: 10.2210/pdb2I2Y/pdb
• NDB: 2I2Y

• Classification: RNA binding protein/Chimera/RNA
• Organism(s): Streptococcus sp. 'group G, Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2006-08-17 Released: 2006-12-12 
• Deposition Author(s): Hargous, Y.F., Allain, F.H.

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Experimental Data Snapshot

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

Literature

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

• PubMed: 17036044 
• DOI: 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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Fusion protein consists of immunoglobulin G-Binding Protein G and Splicing factor, arginine/serine-rich 3	B [auth A]	150	Streptococcus sp. 'group G, Homo 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
PHAROS:  P84103 GTEx:  ENSG00000112081
Find proteins for P19909 (Streptococcus sp. group G) Explore P19909  Go to UniProtKB:  P19909

Entity ID: 1
Molecule	Chains	Length	Organism	Image
(5'-R(*CP*AP*UP*C)-3')	A [auth B]	4	N/A

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 28 
• Selection Criteria: structures with the least restraint violations 
• OLDERADO: 2I2Y Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-08-17 
• Released Date: 2006-12-12 
Deposition Author(s): Hargous, Y.F., Allain, F.H.

Revision History  

• 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