4WV6

Heterodimer of Importin alpha 1 with nuclear localization signal of TAF8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.153 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Cytoplasmic TAF2-TAF8-TAF10 complex provides evidence for nuclear holo-TFIID assembly from preformed submodules.

Trowitzsch, S.Viola, C.Scheer, E.Conic, S.Chavant, V.Fournier, M.Papai, G.Ebong, I.O.Schaffitzel, C.Zou, J.Haffke, M.Rappsilber, J.Robinson, C.V.Schultz, P.Tora, L.Berger, I.

(2015) Nat Commun 6: 6011-6011

  • DOI: 10.1038/ncomms7011
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • General transcription factor TFIID is a cornerstone of RNA polymerase II transcription initiation in eukaryotic cells. How human TFIID-a megadalton-sized multiprotein complex composed of the TATA-binding protein (TBP) and 13 TBP-associated factors (T ...

    General transcription factor TFIID is a cornerstone of RNA polymerase II transcription initiation in eukaryotic cells. How human TFIID-a megadalton-sized multiprotein complex composed of the TATA-binding protein (TBP) and 13 TBP-associated factors (TAFs)-assembles into a functional transcription factor is poorly understood. Here we describe a heterotrimeric TFIID subcomplex consisting of the TAF2, TAF8 and TAF10 proteins, which assembles in the cytoplasm. Using native mass spectrometry, we define the interactions between the TAFs and uncover a central role for TAF8 in nucleating the complex. X-ray crystallography reveals a non-canonical arrangement of the TAF8-TAF10 histone fold domains. TAF2 binds to multiple motifs within the TAF8 C-terminal region, and these interactions dictate TAF2 incorporation into a core-TFIID complex that exists in the nucleus. Our results provide evidence for a stepwise assembly pathway of nuclear holo-TFIID, regulated by nuclear import of preformed cytoplasmic submodules.


    Organizational Affiliation

    1] European Molecular Biology Laboratory, Grenoble Outstation, 6 rue Jules Horowitz, 38042 Grenoble, France [2] Unit for Virus Host-Cell Interactions, University Grenoble Alpes-EMBL-CNRS, 6 rue Jules Horowitz, 38042 Grenoble, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Importin subunit alpha-1
A
471Homo sapiensMutation(s): 0 
Gene Names: KPNA2 (RCH1, SRP1)
Find proteins for P52292 (Homo sapiens)
Go to Gene View: KPNA2
Go to UniProtKB:  P52292
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Transcription initiation factor TFIID subunit 8
B, C
14Homo sapiensMutation(s): 0 
Gene Names: TAF8 (TAFII43, TBN)
Find proteins for Q7Z7C8 (Homo sapiens)
Go to Gene View: TAF8
Go to UniProtKB:  Q7Z7C8
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.153 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 54.270α = 90.00
b = 77.720β = 90.00
c = 128.570γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
PHENIXrefinement
XSCALEdata scaling
Cootmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2014-11-04 
  • Released Date: 2015-01-28 
  • Deposition Author(s): Trowitzsch, S.

Funding OrganizationLocationGrant Number
European Commission (EC) Research Executive Agency (REA)France254671

Revision History 

  • Version 1.0: 2015-01-28
    Type: Initial release