1IBR

COMPLEX OF RAN WITH IMPORTIN BETA

• PDB DOI: https://doi.org/10.2210/pdb1IBR/pdb

• Classification: cell cycle,translation
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 1999-05-14 Released: 1999-06-03 
• Deposition Author(s): Vetter, I.R., Arndt, A., Kutay, U., Goerlich, D., Wittinghofer, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.272 
• R-Value Work: 0.245 

Literature

Structural view of the Ran-Importin beta interaction at 2.3 A resolution

Vetter, I.R., Arndt, A., Kutay, U., Gorlich, D., Wittinghofer, A.

(1999) Cell 97: 635-646

• PubMed: 10367892 
• DOI: https://doi.org/10.1016/s0092-8674(00)80774-6
• Primary Citation of Related Structures:  
  1IBR


• PubMed Abstract: 
  

  Transport receptors of the Importin beta family shuttle between the nucleus and cytoplasm and mediate transport of macromolecules through nuclear pore complexes. They interact specifically with the GTP-binding protein Ran, which in turn regulates their interaction with cargo. Here, we report the three-dimensional structure of a complex between Ran bound to the nonhydrolyzable GTP analog GppNHp and a 462-residue fragment from Importin beta. The structure of Importin beta shows 10 tandem repeats resembling HEAT and Armadillo motifs. They form an irregular crescent, the concave site of which forms the interface with Ran-triphosphate. The importin-binding site of Ran does not overlap with that of the Ran-binding domain of RanBP2.

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Organizational Affiliation: 

Max-Planck-Institut für molekulare Physiologie, Dortmund, Germany.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 152.95 kDa 
• Atom Count: 10,117 
• Modelled Residue Count: 1,234 
• Deposited Residue Count: 1,356 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
GTP-binding nuclear protein RAN	A, C	216	Homo sapiens	Mutation(s): 0  EC: 3.6.5
UniProt & NIH Common Fund Data Resources
Find proteins for P62826 (Homo sapiens) Explore P62826  Go to UniProtKB:  P62826
PHAROS:  P62826 GTEx:  ENSG00000132341

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Importin beta-1 subunit	B, D	462	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for Q14974 (Homo sapiens) Explore Q14974  Go to UniProtKB:  Q14974
PHAROS:  Q14974 GTEx:  ENSG00000108424

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GNP	F [auth A], H [auth C]	PHOSPHOAMINOPHOSPHONIC ACID-GUANYLATE ESTER C10 H17 N6 O13 P3 UQABYHGXWYXDTK-UUOKFMHZSA-N
MG	E [auth A], G [auth C]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.272 
• R-Value Work: 0.245 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 65.7	α = 90
b = 108.95	β = 100.66
c = 114.05	γ = 90

Software Package:

Software Name	Purpose
XDS	data scaling
XSCALE	data scaling
MLPHARE	phasing
CNS	refinement
XDS	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-06-03 
Deposition Author(s): Vetter, I.R., Arndt, A., Kutay, U., Goerlich, D., Wittinghofer, A.

Revision History  

• Version 1.0: 1999-06-03
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-12-27
  Changes: Data collection, Database references, Derived calculations