1JMT

X-ray Structure of a Core U2AF65/U2AF35 Heterodimer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A novel peptide recognition mode revealed by the X-ray structure of a core U2AF35/U2AF65 heterodimer.

Kielkopf, C.L.Rodionova, N.A.Green, M.R.Burley, S.K.

(2001) Cell 106: 595-605


  • PubMed Abstract: 
  • U2 auxiliary factor (U2AF) is an essential splicing factor that recognizes the 3' splice site and recruits the U2 snRNP to the branch point. The X-ray structure of the human core U2AF heterodimer, consisting of the U2AF35 central domain and a proline ...

    U2 auxiliary factor (U2AF) is an essential splicing factor that recognizes the 3' splice site and recruits the U2 snRNP to the branch point. The X-ray structure of the human core U2AF heterodimer, consisting of the U2AF35 central domain and a proline-rich region of U2AF65, has been determined at 2.2 A resolution. The structure reveals a novel protein-protein recognition strategy, in which an atypical RNA recognition motif (RRM) of U2AF35 and the U2AF65 polyproline segment interact via reciprocal "tongue-in-groove" tryptophan residues. Complementary biochemical experiments demonstrate that the core U2AF heterodimer binds RNA, and that the interacting tryptophan side chains are essential for U2AF dimerization. Atypical RRMs in other splicing factors may serve as protein-protein interaction motifs elsewhere during spliceosome assembly.


    Organizational Affiliation

    Laboratories of Molecular Biophysics, The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SPLICING FACTOR U2AF 35 KDA SUBUNIT
A
104Homo sapiensMutation(s): 1 
Gene Names: U2AF1 (U2AF35, U2AFBP)
Find proteins for Q01081 (Homo sapiens)
Go to Gene View: U2AF1
Go to UniProtKB:  Q01081
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SPLICING FACTOR U2AF 65 KDA SUBUNIT
B
28Homo sapiensMutation(s): 0 
Gene Names: U2AF2 (U2AF65)
Find proteins for P26368 (Homo sapiens)
Go to Gene View: U2AF2
Go to UniProtKB:  P26368
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEZ
Query on HEZ

Download SDF File 
Download CCD File 
A, B
HEXANE-1,6-DIOL
C6 H14 O2
XXMIOPMDWAUFGU-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.226 
  • Space Group: P 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 41.520α = 90.00
b = 49.740β = 90.00
c = 92.160γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
SOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-09-19
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance