4WYK

Structure of the LRR and NTF2-like domains of NXF1 complexed with NXT1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The principal mRNA nuclear export factor NXF1:NXT1 forms a symmetric binding platform that facilitates export of retroviral CTE-RNA.

Aibara, S.Katahira, J.Valkov, E.Stewart, M.

(2015) Nucleic Acids Res. 43: 1883-1893

  • DOI: 10.1093/nar/gkv032

  • PubMed Abstract: 
  • The NXF1:NXT1 complex (also known as TAP:p15) is a general mRNA nuclear export factor that is conserved from yeast to humans. NXF1 is a modular protein constructed from four domains (RRM, LRR, NTF2-like and UBA domains). It is currently unclear how N ...

    The NXF1:NXT1 complex (also known as TAP:p15) is a general mRNA nuclear export factor that is conserved from yeast to humans. NXF1 is a modular protein constructed from four domains (RRM, LRR, NTF2-like and UBA domains). It is currently unclear how NXF1:NXT1 binds transcripts and whether there is higher organization of the NXF1 domains. We report here the 3.4 Å resolution crystal structure of the first three domains of human NXF1 together with NXT1 that has two copies of the complex in the asymmetric unit arranged to form an intimate domain-swapped dimer. In this dimer, the linkers between the NXF1 LRR and NTF2-like domains interact with NXT1, generating a 2-fold symmetric platform in which the RNA-binding RRM, LRR and NTF2-like domains are arranged on one face. In addition to bulk transcripts, NXF1:NXT1 also facilitates the export of unspliced retroviral genomic RNA from simple type-D retroviruses such as SRV-1 that contain a constitutive transport element (CTE), a cis-acting 2-fold symmetric RNA stem-loop motif. Complementary structural, biochemical and cellular techniques indicated that the formation of a symmetric RNA binding platform generated by dimerization of NXF1:NXT1 facilitates the recognition of CTE-RNA and promotes its nuclear export.


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge CB2 0QH, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nuclear RNA export factor 1
A, C
461Homo sapiensMutation(s): 0 
Gene Names: NXF1 (TAP)
Find proteins for Q9UBU9 (Homo sapiens)
Go to Gene View: NXF1
Go to UniProtKB:  Q9UBU9
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
NTF2-related export protein 1
B, D
139Homo sapiensMutation(s): 0 
Gene Names: NXT1
Find proteins for Q9UKK6 (Homo sapiens)
Go to Gene View: NXT1
Go to UniProtKB:  Q9UKK6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.213 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 48.046α = 108.69
b = 83.972β = 99.76
c = 108.233γ = 97.51
Software Package:
Software NamePurpose
Cootmodel building
PHENIXrefinement
Aimlessdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomU105178939

Revision History 

  • Version 1.0: 2015-02-04
    Type: Initial release
  • Version 1.1: 2015-02-11
    Type: Database references
  • Version 1.2: 2015-02-25
    Type: Database references
  • Version 1.3: 2017-09-13
    Type: Author supporting evidence