Structure of SF1 coiled-coil domain

Experimental Data Snapshot

  • Resolution: 2.48 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.239 

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Structure of Phosphorylated SF1 Bound to U2AF(65) in an Essential Splicing Factor Complex.

Wang, W.Maucuer, A.Gupta, A.Manceau, V.Thickman, K.R.Bauer, W.J.Kennedy, S.D.Wedekind, J.E.Green, M.R.Kielkopf, C.L.

(2013) Structure 21: 197-208

  • DOI: https://doi.org/10.1016/j.str.2012.10.020
  • Primary Citation of Related Structures:  
    4FXW, 4FXX

  • PubMed Abstract: 

    The essential splicing factors U2AF⁶⁵ and SF1 cooperatively bind consensus sequences at the 3' end of introns. Phosphorylation of SF1 on a highly conserved "SPSP" motif enhances its interaction with U2AF⁶⁵ and the pre-mRNA. Here, we reveal that phosphorylation induces essential conformational changes in SF1 and in the SF1/U2AF⁶⁵/3' splice site complex. Crystal structures of the phosphorylated (P)SF1 domain bound to the C-terminal domain of U2AF⁶⁵ at 2.29 Å resolution and of the unphosphorylated SF1 domain at 2.48 Å resolution demonstrate that phosphorylation induces a disorder-to-order transition within a previously unknown SF1/U2AF⁶⁵ interface. We find by small-angle X-ray scattering that the local folding of the SPSP motif transduces into global conformational changes in the nearly full-length (P)SF1/U2AF⁶⁵/3' splice site assembly. We further determine that SPSP phosphorylation and the SF1/U2AF⁶⁵ interface are essential in vivo. These results offer a structural prototype for phosphorylation-dependent control of pre-mRNA splicing factors.

  • Organizational Affiliation

    Center for RNA Biology and Department of Biochemistry and Biophysics, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Splicing factor 1
A, B, C, D
112Homo sapiensMutation(s): 0 
Gene Names: SF1ZFM1ZNF162
UniProt & NIH Common Fund Data Resources
Find proteins for Q15637 (Homo sapiens)
Explore Q15637 
Go to UniProtKB:  Q15637
PHAROS:  Q15637
GTEx:  ENSG00000168066 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ15637
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on MLI

Download Ideal Coordinates CCD File 
F [auth A],
K [auth C]
C3 H2 O4
Query on IMD

Download Ideal Coordinates CCD File 
E [auth A]
G [auth B]
H [auth B]
I [auth C]
J [auth C]
E [auth A],
G [auth B],
H [auth B],
I [auth C],
J [auth C],
L [auth D],
M [auth D],
N [auth D]
C3 H5 N2
Experimental Data & Validation

Experimental Data

  • Resolution: 2.48 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.239 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 96.03α = 90
b = 37.97β = 107.38
c = 144.68γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PDB_EXTRACTdata extraction
webicedata collection
MOSFLMdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-01-16
    Type: Initial release
  • Version 1.1: 2013-02-27
    Changes: Database references