4ATG

TAF6 C-terminal domain from Antonospora locustae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.89 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

TFIID Taf6-Taf9 Complex Formation Involves the Heat Repeat-Containing C-Terminal Domain of Taf6 and is Modulated by Taf5 Protein.

Scheer, E.Delbac, F.Tora, L.Moras, D.Romier, C.

(2012) J.Biol.Chem. 287: 27580

  • DOI: 10.1074/jbc.M112.379206

  • PubMed Abstract: 
  • The general transcription factor TFIID recognizes specifically the core promoter of genes transcribed by eukaryotic RNA polymerase II, nucleating the assembly of the preinitiation complex at the transcription start site. However, the understanding in ...

    The general transcription factor TFIID recognizes specifically the core promoter of genes transcribed by eukaryotic RNA polymerase II, nucleating the assembly of the preinitiation complex at the transcription start site. However, the understanding in molecular terms of TFIID assembly and function remains poorly understood. Histone fold motifs have been shown to be extremely important for the heterodimerization of many TFIID subunits. However, these subunits display several evolutionary conserved noncanonical features when compared with histones, including additional regions whose role is unknown. Here we show that the conserved additional C-terminal region of TFIID subunit TAF6 can be divided into two domains: a small middle domain (TAF6M) and a large C-terminal domain (TAF6C). Our crystal structure of the TAF6C domain from Antonospora locustae at 1.9 Å resolution reveals the presence of five conserved HEAT repeats. Based on these data, we designed several mutants that were introduced into full-length human TAF6. Surprisingly, the mutants affect the interaction between TAF6 and TAF9, suggesting that the formation of the complex between these two TFIID subunits do not only depend on their histone fold motifs. In addition, the same mutants affect even more strongly the interaction between TAF6 and TAF9 in the context of a TAF5-TAF6-TAF9 complex. Expression of these mutants in HeLa cells reveals that most of them are unstable, suggesting their poor incorporation within endogenous TFIID. Taken together, our results suggest that the conserved additional domains in histone fold-containing subunits of TFIID and of co-activator SAGA are important for the assembly of these complexes.


    Organizational Affiliation

    Département de Biologie Intégrative, Institut de Génétique et Biologie Moléculaire et Cellulaire (IGBMC), Université de Strasbourg (UDS), CNRS, INSERM, 1 rue Laurent Fries, B.P. 10142, 67404 Illkirch Cedex, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TAF6
A
196Antonospora locustaeMutation(s): 0 
Find proteins for I6L8L5 (Antonospora locustae)
Go to UniProtKB:  I6L8L5
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NHE
Query on NHE

Download SDF File 
Download CCD File 
A
2-[N-CYCLOHEXYLAMINO]ETHANE SULFONIC ACID
N-CYCLOHEXYLTAURINE; CHES
C8 H17 N O3 S
MKWKNSIESPFAQN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.89 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.169 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 33.792α = 90.00
b = 50.685β = 100.81
c = 67.293γ = 90.00
Software Package:
Software NamePurpose
BUSTERrefinement
DENZOdata reduction
SCALEPACKdata scaling
SHARPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-05-07 
  • Released Date: 2012-06-20 
  • Deposition Author(s): Romier, C.

Revision History 

  • Version 1.0: 2012-06-20
    Type: Initial release
  • Version 1.1: 2012-07-25
    Type: Database references
  • Version 1.2: 2012-08-22
    Type: Database references, Structure summary