4WWU

Structure of Mex67:Mtr2

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.231 

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Literature

Domain organization within the nuclear export factor Mex67:Mtr2 generates an extended mRNA binding surface.

Aibara, S., Valkov, E., Lamers, M., Stewart, M.

(2015) Nucleic Acids Res 43: 1927-1936

  • DOI: 10.1093/nar/gkv030
  • Primary Citation of Related Structures:  
    4WWU

  • PubMed Abstract: 

    • The Mex67:Mtr2 complex is the principal yeast nuclear export factor for bulk mRNA and also contributes to ribosomal subunit export. Mex67 is a modular protein constructed from four domains (RRM, LRR, NTF2-like and UBA) that have been thought to be joined by flexible linkers like beads on a string, with the RRM and LRR domains binding RNAs and the NTF2-like and UBA domains binding FG-nucleoporins to facilitate movement through nuclear pores ...

    The Mex67:Mtr2 complex is the principal yeast nuclear export factor for bulk mRNA and also contributes to ribosomal subunit export. Mex67 is a modular protein constructed from four domains (RRM, LRR, NTF2-like and UBA) that have been thought to be joined by flexible linkers like beads on a string, with the RRM and LRR domains binding RNAs and the NTF2-like and UBA domains binding FG-nucleoporins to facilitate movement through nuclear pores. Here, we show that the NTF2-like domain from Saccharomyces cerevisiae Mex67:Mtr2 also contributes to RNA binding. Moreover, the 3.3 Å resolution crystal structure of the Mex67(ΔUBA):Mtr2 complex, supplemented with small angle X-ray scattering data, indicated that the LRR domain has a defined spatial relationship to the Mex67(NTF2L):Mtr2 region. Conversely, the RRM domain and especially the UBA domain are more mobile. The conformation assumed by the LRR and NTF2-like domains results in clusters of positively-charged residues on each becoming arranged to form a continuous interface for binding RNA on the opposite side of the complex to the region that interacts with FG-nucleoporins to facilitate passage through nuclear pores.

    Organizational Affiliation: 

    MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge CB2 0QH, UK ms@mrc-lmb.cam.ac.uk.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
mRNA export factor MEX67
A, B, D, E, G, H, J, K
A, B, D, E, G, H, J, K
488Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: MEX67, YPL169C, P2520
UniProt
Find proteins for Q99257 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q99257 
Go to UniProtKB:  Q99257
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ99257
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
mRNA transport regulator MTR2C, F, I, L184Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: MTR2, YKL186C
UniProt
Find proteins for P34232 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P34232 
Go to UniProtKB:  P34232
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP34232
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.231 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.61α = 90
b = 76.72β = 94.09
c = 199.12γ = 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: 2015-02-04
    Type: Initial release
  • Version 1.1: 2015-02-25
    Changes: Database references