2BN5

P-Element Somatic Inhibitor Protein Complex with U1-70k proline-rich peptide


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 28 
  • Selection Criteria: LOW NOE ENERGY 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis of the Interaction between P-Element Somatic Inhibitor and U1-70K Essential for the Alternative Splicing of P-Element Transposase.

Ignjatovic, T.Yang, J.-C.Butler, J.Neuhaus, D.Nagai, K.

(2005) J.Mol.Biol. 351: 52

  • DOI: 10.1016/j.jmb.2005.04.077
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • P-element transposition in Drosophila is regulated by tissue-specific alternative splicing of the P-element transposase pre-mRNA. In somatic cells, the P-element somatic inhibitor (PSI) protein binds to exon 3 of the pre-mRNA and recruits U1 small nu ...

    P-element transposition in Drosophila is regulated by tissue-specific alternative splicing of the P-element transposase pre-mRNA. In somatic cells, the P-element somatic inhibitor (PSI) protein binds to exon 3 of the pre-mRNA and recruits U1 small nuclear ribonucleoprotein (snRNP) to the F1 pseudo-splice site. This abrogates binding of U1 snRNP to the genuine 5' splice site, thereby preventing excision of the third intron. Two homologous short sequences, referred to as the A and B boxes, near the C terminus of PSI bind to U1-70k protein within U1 snRNP. We have now mapped the AB box-binding site of U1-70k to a short proline-rich sequence at the C terminus. Our NMR study shows that the B box forms an anti-parallel helical hairpin in which four highly conserved aromatic residues form a cluster on one face of the first helix. This hydrophobic cluster interacts extensively with the proline-rich region of the U1-70k protein.


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PSI
A
33Drosophila sp.Mutation(s): 0 
Gene Names: PSI
Find proteins for Q7JPS0 (Drosophila sp.)
Go to UniProtKB:  Q7JPS0
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
U1 SMALL NUCLEAR RIBONUCLEOPROTEIN 70 KDA
B
21Drosophila melanogasterMutation(s): 0 
Gene Names: snRNP-U1-70K (snRNP27D, snRNP70K)
Find proteins for P17133 (Drosophila melanogaster)
Go to UniProtKB:  P17133
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 50 
  • Conformers Submitted: 28 
  • Selection Criteria: LOW NOE ENERGY 
  • Olderado: 2BN5 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-07-06
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance