4KNH

Structure of the Chaetomium thermophilum adaptor nucleoporin Nup192 N-terminal domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.702 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Evidence for an evolutionary relationship between the large adaptor nucleoporin Nup192 and karyopherins.

Stuwe, T.Lin, D.H.Collins, L.N.Hurt, E.Hoelz, A.

(2014) Proc.Natl.Acad.Sci.USA 111: 2530-2535

  • DOI: 10.1073/pnas.1311081111

  • PubMed Abstract: 
  • Nucleocytoplasmic transport is facilitated by nuclear pore complexes (NPCs), which are massive proteinaceous transport channels embedded in the nuclear envelope. Nup192 is a major component of an adaptor nucleoporin subcomplex proposed to link the NP ...

    Nucleocytoplasmic transport is facilitated by nuclear pore complexes (NPCs), which are massive proteinaceous transport channels embedded in the nuclear envelope. Nup192 is a major component of an adaptor nucleoporin subcomplex proposed to link the NPC coat with the central transport channel. Here, we present the structure of the ∼110-kDa N-terminal domain (NTD) of Nup192 at 2.7-Å resolution. The structure reveals an open ring-shaped architecture composed of Huntingtin, EF3, PP2A, and TOR1 (HEAT) and Armadillo (ARM) repeats. A comparison of different conformations indicates that the NTD consists of two rigid halves connected by a flexible hinge. Unexpectedly, the two halves of the ring are structurally related to karyopherin-α (Kap-α) and β-karyopherin family members. Biochemically, we identify a conserved patch that binds an unstructured segment in Nup53 and show that a C-terminal tail region binds to a putative helical fragment in Nic96. The Nup53 segment that binds Nup192 is a classical nuclear localization-like sequence that interacts with Kap-α in a mutually exclusive and mechanistically distinct manner. The disruption of the Nup53 and Nic96 binding sites in vivo yields growth and mRNA export defects, revealing their critical role in proper NPC function. Surprisingly, both interactions are dispensable for NPC localization, suggesting that Nup192 possesses another nucleoporin interaction partner. These data indicate that the structured domains in the adaptor nucleoporin complex are held together by peptide interactions that resemble those found in karyopherin•cargo complexes and support the proposal that the adaptor nucleoporins arose from ancestral karyopherins.


    Organizational Affiliation

    Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nup192p
A, B
961Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719)Mutation(s): 0 
Gene Names: NUP192
Find proteins for G0S4T0 (Chaetomium thermophilum (strain DSM 1495 / CBS 144.50 / IMI 039719))
Go to UniProtKB:  G0S4T0
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
EDO
Query on EDO

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Download CCD File 
A, B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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Download CCD File 
B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.702 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.192 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 102.874α = 90.00
b = 102.874β = 90.00
c = 443.070γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-02-05
    Type: Initial release
  • Version 1.1: 2014-03-12
    Type: Database references