2Z5J

Free Transportin 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.232 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis for substrate recognition and dissociation by human transportin 1

Imasaki, T.Shimizu, T.Hashimoto, H.Hidaka, Y.Kose, S.Imamoto, N.Yamada, M.Sato, M.

(2007) Mol.Cell 28: 57-67

  • DOI: 10.1016/j.molcel.2007.08.006
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Transportin 1 (Trn1) is a transport receptor that transports substrates from the cytoplasm to the nucleus through nuclear pore complexes by recognizing nuclear localization signals (NLSs). Here we describe four crystal structures of human Trn1 in a s ...

    Transportin 1 (Trn1) is a transport receptor that transports substrates from the cytoplasm to the nucleus through nuclear pore complexes by recognizing nuclear localization signals (NLSs). Here we describe four crystal structures of human Trn1 in a substrate-free form as well as in the complex with three NLSs (hnRNP D, JKTBP, and TAP, respectively). Our data have revealed that (1) Trn1 has two sites for binding NLSs, one with high affinity (site A) and one with low affinity (site B), and NLS interaction at site B controls overall binding affinity for Trn1; (2) Trn1 recognizes the NLSs at site A followed by conformational change at site B to interact with the NLSs; and (3) a long flexible loop, characteristic of Trn1, interacts with site B, thereby displacing transport substrate in the nucleus. These studies provide deep understanding of substrate recognition and dissociation by Trn1 in import pathways.


    Organizational Affiliation

    Field of Supramolecular Biology, International Graduate School of Arts and Sciences, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transportin-1
A
890Homo sapiensMutation(s): 0 
Gene Names: TNPO1 (KPNB2, MIP1, TRN)
Find proteins for Q92973 (Homo sapiens)
Go to Gene View: TNPO1
Go to UniProtKB:  Q92973
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.4 Å
  • R-Value Free: 0.303 
  • R-Value Work: 0.232 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 107.467α = 90.00
b = 107.467β = 90.00
c = 194.772γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
HKL-2000data scaling
HKL-2000data collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-10-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance