1M5N

Crystal structure of HEAT repeats (1-11) of importin b bound to the non-classical NLS(67-94) of PTHrP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.250 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular basis for the recognition of a nonclassical nuclear localization signal by importin beta

Cingolani, G.Bednenko, J.Gillespie, M.T.Gerace, L.

(2002) Mol Cell 10: 1345-1353

  • DOI: 10.1016/s1097-2765(02)00727-x
  • Primary Citation of Related Structures:  
    1M5N

  • PubMed Abstract: 
  • Nuclear import of proteins containing a classical nuclear localization signal (NLS) involves NLS recognition by importin alpha, which associates with importin beta via the IBB domain. Other proteins, including parathyroid hormone-related protein (PTHrP), are imported into the nucleus by direct interaction with importin beta ...

    Nuclear import of proteins containing a classical nuclear localization signal (NLS) involves NLS recognition by importin alpha, which associates with importin beta via the IBB domain. Other proteins, including parathyroid hormone-related protein (PTHrP), are imported into the nucleus by direct interaction with importin beta. We solved the crystal structure of a fragment of importin beta-1 (1-485) bound to the nonclassical NLS of PTHrP. The structure reveals a second extended cargo binding site on importin beta distinct from the IBB domain binding site. Using a permeabilized cell import assay we demonstrate that importin beta (1-485) can import PTHrP-coupled cargo in a Ran-dependent manner. We propose that this region contains a prototypical nuclear import receptor domain, which could have evolved into the modern importin beta superfamily.


    Organizational Affiliation

    Departments of Cell and Molecular Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Importin beta-1 subunit S485Homo sapiensMutation(s): 0 
Gene Names: KPNB1NTF97
Find proteins for Q14974 (Homo sapiens)
Explore Q14974 
Go to UniProtKB:  Q14974
NIH Common Fund Data Resources
PHAROS:  Q14974
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Parathyroid hormone-related protein Q28N/AMutation(s): 0 
Find proteins for P12272 (Homo sapiens)
Explore P12272 
Go to UniProtKB:  P12272
NIH Common Fund Data Resources
PHAROS:  P12272
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.250 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.792α = 90
b = 105.447β = 90
c = 146.738γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-01-21
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance