4C0Q

Transportin 3 in complex with Ran(Q69L)GTP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.42 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.268 
  • R-Value Observed: 0.269 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural Basis for Nuclear Import of Splicing Factors by Human Transportin 3.

Maertens, G.N.Cook, N.J.Wang, W.Hare, S.Gupta, S.S.Oztop, I.Lee, K.Pye, V.E.Cosnefroy, O.Snijders, A.P.Kewalramani, V.N.Fassati, A.Engelman, A.Cherepanov, P.

(2014) Proc Natl Acad Sci U S A 111: 2728

  • DOI: 10.1073/pnas.1320755111
  • Primary Citation of Related Structures:  
    4C0Q, 4C0O, 4C0P

  • PubMed Abstract: 
  • Transportin 3 (Tnpo3, Transportin-SR2) is implicated in nuclear import of splicing factors and HIV-1 replication. Herein, we show that the majority of cellular Tnpo3 binding partners contain arginine-serine (RS) repeat domains and present crystal structures of human Tnpo3 in its free as well as GTPase Ran- and alternative splicing factor/splicing factor 2 (ASF/SF2)-bound forms ...

    Transportin 3 (Tnpo3, Transportin-SR2) is implicated in nuclear import of splicing factors and HIV-1 replication. Herein, we show that the majority of cellular Tnpo3 binding partners contain arginine-serine (RS) repeat domains and present crystal structures of human Tnpo3 in its free as well as GTPase Ran- and alternative splicing factor/splicing factor 2 (ASF/SF2)-bound forms. The flexible β-karyopherin fold of Tnpo3 embraces the RNA recognition motif and RS domains of the cargo. A constellation of charged residues on and around the arginine-rich helix of Tnpo3 HEAT repeat 15 engage the phosphorylated RS domain and are critical for the recognition and nuclear import of ASF/SF2. Mutations in the same region of Tnpo3 impair its interaction with the cleavage and polyadenylation specificity factor 6 (CPSF6) and its ability to support HIV-1 replication. Steric incompatibility of the RS domain and RanGTP engagement by Tnpo3 provides the mechanism for cargo release in the nucleus. Our results elucidate the structural bases for nuclear import of splicing factors and the Tnpo3-CPSF6 nexus in HIV-1 biology.


    Organizational Affiliation

    Division of Infectious Diseases, Imperial College London, St. Mary's Campus, London W2 1PG, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
TRANSPORTIN-3 AB923Homo sapiensMutation(s): 0 
Gene Names: TNPO3IPO12
Find proteins for Q9Y5L0 (Homo sapiens)
Explore Q9Y5L0 
Go to UniProtKB:  Q9Y5L0
NIH Common Fund Data Resources
PHAROS:  Q9Y5L0
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
GTP-BINDING NUCLEAR PROTEIN RAN CD215Homo sapiensMutation(s): 1 
Gene Names: RANARA24OK/SW-cl.81
Find proteins for P62826 (Homo sapiens)
Explore P62826 
Go to UniProtKB:  P62826
NIH Common Fund Data Resources
PHAROS:  P62826
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTP
Query on GTP

Download Ideal Coordinates CCD File 
C, D
GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
C, D
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A,BL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.42 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.268 
  • R-Value Observed: 0.269 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.95α = 78.43
b = 93.514β = 68.29
c = 104.713γ = 68.28
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-01-22
    Type: Initial release
  • Version 1.1: 2014-01-29
    Changes: Database references, Structure summary
  • Version 1.2: 2014-02-05
    Changes: Database references
  • Version 1.3: 2014-03-05
    Changes: Database references