4WPX

Chaetomium theromophilum TREX2 CID domain complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.31 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.221 

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This is version 1.1 of the entry. See complete history


Literature

Structural Characterization of the Chaetomium thermophilum TREX-2 Complex and its Interaction with the mRNA Nuclear Export Factor Mex67:Mtr2.

Dimitrova, L.Valkov, E.Aibara, S.Flemming, D.McLaughlin, S.H.Hurt, E.Stewart, M.

(2015) Structure 23: 1246-1257

  • DOI: 10.1016/j.str.2015.05.002
  • Primary Citation of Related Structures:  
    4WPX, 4X2O, 4X2H

  • PubMed Abstract: 
  • The TREX-2 complex integrates mRNA nuclear export into the gene expression pathway and is based on a Sac3 scaffold to which Thp1, Sem1, Sus1, and Cdc31 bind. TREX-2 also binds the mRNA nuclear export factor, Mex67:Mtr2, through the Sac3 N-terminal region (Sac3N) ...

    The TREX-2 complex integrates mRNA nuclear export into the gene expression pathway and is based on a Sac3 scaffold to which Thp1, Sem1, Sus1, and Cdc31 bind. TREX-2 also binds the mRNA nuclear export factor, Mex67:Mtr2, through the Sac3 N-terminal region (Sac3N). Here, we characterize Chaetomium thermophilum TREX-2, show that the in vitro reconstituted complex has an annular structure, and define the structural basis for interactions between Sac3, Sus1, Cdc31, and Mex67:Mtr2. Crystal structures show that the binding of C. thermophilum Sac3N to the Mex67 NTF2-like domain (Mex67(NTF2L)) is mediated primarily through phenylalanine residues present in a series of repeating sequence motifs that resemble those seen in many nucleoporins, and Mlp1 also binds Mex67:Mtr2 using a similar motif. Deletion of Sac3N generated growth and mRNA export defects in Saccharomyces cerevisiae, and we propose TREX-2 and Mlp1 function to facilitate export by concentrating mature messenger ribonucleoparticles at the nuclear pore entrance.


    Organizational Affiliation

    Medical Research Council Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge CB2 0QH, UK. Electronic address: ms@mrc-lmb.cam.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cell division control protein 31-like proteinA, D177Chaetomium thermophilumMutation(s): 0 
Find proteins for G0SAR7 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Explore G0SAR7 
Go to UniProtKB:  G0SAR7
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Putative SAC3 family proteinB, E89Chaetomium thermophilumMutation(s): 0 
Find proteins for G0SGL4 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Explore G0SGL4 
Go to UniProtKB:  G0SGL4
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Putative uncharacterized proteinC, F181Chaetomium thermophilumMutation(s): 0 
Find proteins for G0S6Y1 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Explore G0S6Y1 
Go to UniProtKB:  G0S6Y1
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.31 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.221 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.528α = 90
b = 168.288β = 112.21
c = 69.223γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-06-17
    Type: Initial release
  • Version 1.1: 2015-07-15
    Changes: Database references