1XKE

Solution structure of the second Ran-binding domain from human RanBP2


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Solution structure of the Ran-binding domain 2 of RanBP2 and its interaction with the C terminus of Ran.

Geyer, J.P.Doker, R.Kremer, W.Zhao, X.Kuhlmann, J.Kalbitzer, H.R.

(2005) J.Mol.Biol. 348: 711-725

  • DOI: 10.1016/j.jmb.2005.02.033

  • PubMed Abstract: 
  • The termination of export processes from the nucleus to the cytoplasm in higher eukaryotes is mediated by binding of the small GTPase Ran as part of the export complexes to the Ran-binding domains (RanBD) of Ran-binding protein 2 (RanBP2) of the nucl ...

    The termination of export processes from the nucleus to the cytoplasm in higher eukaryotes is mediated by binding of the small GTPase Ran as part of the export complexes to the Ran-binding domains (RanBD) of Ran-binding protein 2 (RanBP2) of the nuclear pore complex. So far, the structures of the first RanBD of RanBP2 and of RanBP1 in complexes with Ran have been known from X-ray crystallographic studies. Here we report the NMR solution structure of the uncomplexed second RanBD of RanBP2. The structure shows a pleckstrin homology (PH) fold featuring two almost orthogonal beta-sheets consisting of three and four strands and an alpha-helix sitting on top. This is in contrast to the RanBD in the crystal structure complexes in which one beta-strand is missing. That is probably due to the binding of the C-terminal alpha-helix of Ran to the RanBD in these complexes. To analyze the interaction between RanBD2 and the C terminus of Ran, NMR-titration studies with peptides comprising the six or 28 C-terminal residues of Ran were performed. While the six-residue peptide alone does not bind to RanBD2 in a specific manner, the 28-residue peptide, including the entire C-terminal helix of Ran, binds to RanBD2 in a manner analogous to the crystal structures. By solving the solution structure of the 28mer peptide alone, we confirmed that it adopts a stable alpha-helical structure like in native Ran and therefore serves as a valid model of the Ran C terminus. These results support current models that assume recognition of the transport complexes by the RanBDs through the Ran C terminus that is exposed in these complexes.


    Related Citations: 
    • Sequence-specific resonance assignment of the second Ran-binding domain of human RanBP2
      Doeker, R.,Zhao, X.,Kremer, W.,Villa, B.,Kuhlmann, J.,Kalbitzer, H.R.
      (2002) J.Biomol.Nmr 22: 185


    Organizational Affiliation

    Institut für Biophysik und physikalische Biochemie, Universität Regensburg, Universitätsstrasse 31, D-93053 Regensburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ran-binding protein 2
A
130Homo sapiensMutation(s): 0 
Gene Names: RANBP2 (NUP358)
EC: 2.3.2.-
Find proteins for P49792 (Homo sapiens)
Go to Gene View: RANBP2
Go to UniProtKB:  P49792
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 1XKE Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-04-19
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance