3WVZ

Crystal structure of Hikeshi, a new nuclear transport receptor of Hsp70


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.88 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.208 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural and functional analysis of Hikeshi, a new nuclear transport receptor of Hsp70s

Song, J.Kose, S.Watanabe, A.Son, S.Y.Choi, S.Hong, H.Yamashita, E.Park, I.Y.Imamoto, N.Lee, S.J.

(2015) Acta Crystallogr D Biol Crystallogr 71: 473-483

  • DOI: 10.1107/S1399004714026881
  • Primary Citation of Related Structures:  
    3WVZ, 3WW0

  • PubMed Abstract: 
  • Hikeshi is a nuclear transport receptor required for cell survival after stress. It mediates heat-shock-induced nuclear import of 70 kDa heat-shock proteins (Hsp70s) through interactions with FG-nucleoporins (FG-Nups), which are proteins in nuclear pore complexes (NPCs) ...

    Hikeshi is a nuclear transport receptor required for cell survival after stress. It mediates heat-shock-induced nuclear import of 70 kDa heat-shock proteins (Hsp70s) through interactions with FG-nucleoporins (FG-Nups), which are proteins in nuclear pore complexes (NPCs). Here, the crystal structure of human Hikeshi is presented at 1.8 Å resolution. Hikeshi forms an asymmetric homodimer that is responsible for the interaction with Hsp70s. The asymmetry of Hikeshi arises from the distinct conformation of the C-terminal domain (CTD) and the flexibility of the linker regions of each monomer. Structure-guided mutational analyses showed that both the flexible linker region and the CTD are important for nuclear import of Hsp70. Pull-down assays revealed that only full-length Hsp70s can interact with Hikeshi. The N-terminal domain (NTD) consists of a jelly-roll/β-sandwich fold structure which contains hydrophobic pockets involved in FG-Nup recognition. A unique extended loop (E-loop) in the NTD is likely to regulate the interactions of Hikeshi with FG-Nups. The crystal structure of Hikeshi explains how Hikeshi participates in the regulation of nuclear import through the recognition of FG-Nups and which part of Hikeshi affects its binding to Hsp70. This study is the first to yield structural insight into this highly unique import receptor.


    Organizational Affiliation

    College of Pharmacy, Chungbuk National University, 48 Gaeshin-dong, Heungduk-gu, Cheongju, Chungbuk 361-763, Republic of Korea.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein HikeshiA, B201Homo sapiensMutation(s): 0 
Gene Names: C11orf73HSPC138HSPC179HSPC248HIKESHI
UniProt & NIH Common Fund Data Resources
Find proteins for Q53FT3 (Homo sapiens)
Explore Q53FT3 
Go to UniProtKB:  Q53FT3
PHAROS:  Q53FT3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ53FT3
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.88 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.208 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 61.138α = 90
b = 137.839β = 90
c = 97.902γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASESphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-03-25
    Type: Initial release