4C9B

Crystal structure of eIF4AIII-CWC22 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of the Human Eif4Aiii-Cwc22 Complex Shows How a Dead-Box Protein is Inhibited by a Mif4G Domain

Buchwald, G.Schuessler, S.Basquin, C.Le Hir, H.Conti, E.

(2013) Proc.Natl.Acad.Sci.USA 110: E4611

  • DOI: 10.1073/pnas.1314684110

  • PubMed Abstract: 
  • DEAD-box proteins are involved in all aspects of RNA processing. They bind RNA in an ATP-dependent manner and couple ATP hydrolysis to structural and compositional rearrangements of ribonucleoprotein particles. Conformational control is a major point ...

    DEAD-box proteins are involved in all aspects of RNA processing. They bind RNA in an ATP-dependent manner and couple ATP hydrolysis to structural and compositional rearrangements of ribonucleoprotein particles. Conformational control is a major point of regulation for DEAD-box proteins to act on appropriate substrates and in a timely manner in vivo. Binding partners containing a middle domain of translation initiation factor 4G (MIF4G) are emerging as important regulators. Well-known examples are eIF4G and Gle1, which bind and activate the DEAD-box proteins eIF4A and Dbp5. Here, we report the mechanism of an inhibiting MIF4G domain. We determined the 2.0-Å resolution structure of the complex of human eIF4AIII and the MIF4G domain of the splicing factor Complexed With Cef1 (CWC22), an essential prerequisite for exon junction complex assembly by the splicing machinery. The CWC22 MIF4G domain binds both RecA domains of eIF4AIII. The mode of RecA2 recognition is similar to that observed in the activating complexes, yet is specific for eIF4AIII. The way the CWC22 MIF4G domain latches on the eIF4AIII RecA1 domain is markedly different from activating complexes. In the CWC22-eIF4AIII complex, the RNA-binding and ATP-binding motifs of the two RecA domains do not face each other, as would be required in the active state, but are in diametrically opposite positions. The binding mode of CWC22 to eIF4AIII reveals a facet of how MIF4G domains use their versatile structural frameworks to activate or inhibit DEAD-box proteins.


    Organizational Affiliation

    Department of Structural Cell Biology, Max Planck Institute of Biochemistry, D-82152 Martinsried/Munich, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EUKARYOTIC INITIATION FACTOR 4A-III
A
411Homo sapiensMutation(s): 0 
Gene Names: EIF4A3 (DDX48, KIAA0111)
EC: 3.6.4.13
Find proteins for P38919 (Homo sapiens)
Go to Gene View: EIF4A3
Go to UniProtKB:  P38919
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PRE-MRNA-SPLICING FACTOR CWC22 HOMOLOG
B
291Homo sapiensMutation(s): 0 
Gene Names: CWC22 (KIAA1604, NCM)
Find proteins for Q9HCG8 (Homo sapiens)
Go to Gene View: CWC22
Go to UniProtKB:  Q9HCG8
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.202 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 56.290α = 90.00
b = 108.720β = 99.94
c = 61.370γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
XDSdata scaling
PHENIXrefinement
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-11-13
    Type: Initial release
  • Version 1.1: 2013-11-20
    Type: Database references
  • Version 1.2: 2013-12-11
    Type: Database references