3ND2

Structure of Yeast Importin-beta (Kap95p)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Quantitative Structural Analysis of Importin-beta Flexibility: Paradigm for Solenoid Protein Structures

Forwood, J.K.Lange, A.Zachariae, U.Marfori, M.Preast, C.Grubmuller, H.Stewart, M.Corbett, A.H.Kobe, B.

(2010) Structure 18: 1171-1183

  • DOI: 10.1016/j.str.2010.06.015

  • PubMed Abstract: 
  • The structure of solenoid proteins facilitates a higher degree of flexibility than most folded proteins. In importin-β, a nuclear import factor built from 19 tandem HEAT repeats, flexibility plays a crucial role in allowing interactions with a range ...

    The structure of solenoid proteins facilitates a higher degree of flexibility than most folded proteins. In importin-β, a nuclear import factor built from 19 tandem HEAT repeats, flexibility plays a crucial role in allowing interactions with a range of different partners. We present a comprehensive analysis of importin-β flexibility based on a number of different approaches. We determined the crystal structure of unliganded Saccharomyces cerevisiae importin-β (Kap95) to allow a quantitative comparison with importin-β bound to different partners. Complementary mutagenesis, small angle X-ray scattering and molecular dynamics studies suggest that the protein samples several conformations in solution. The analyses suggest the flexibility of the solenoid is generated by cumulative small movements along its length. Importin-β illustrates how solenoid proteins can orchestrate protein interactions in many cellular pathways.


    Organizational Affiliation

    School of Biomedical Sciences, Charles Sturt University, Wagga Wagga, New South Wales 2650, Australia. jforwood@csu.edu.au




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Importin subunit beta-1
A
861Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: KAP95
Find proteins for Q06142 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q06142
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.213 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 58.835α = 90.00
b = 128.272β = 102.68
c = 69.050γ = 90.00
Software Package:
Software NamePurpose
CrystalCleardata collection
REFMACrefinement
d*TREKdata scaling
d*TREKdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance