1H3O

Crystal Structure of the Human TAF4-TAF12 (TAFII135-TAFII20) Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of a Subcomplex of Human Transcription Factor TFIID Formed by TATA Binding Protein-Associated Factors Htaf4 (Htaf(II)135) and Htaf12 (Htaf(II)20).

Werten, S.Mitschler, A.Romier, C.Gangloff, Y.-G.Thuault, S.Davidson, I.Moras, D.

(2002) J.Biol.Chem. 277: 45502

  • DOI: 10.1074/jbc.M206587200

  • PubMed Abstract: 
  • The crystal structure is presented of a complex formed by the interacting domains from two subunits of the general transcription factor TFIID, the human TATA binding protein-associated factors hTAF4 (hTAF(II)135) and hTAF12 (hTAF(II)20). In agreement ...

    The crystal structure is presented of a complex formed by the interacting domains from two subunits of the general transcription factor TFIID, the human TATA binding protein-associated factors hTAF4 (hTAF(II)135) and hTAF12 (hTAF(II)20). In agreement with predictions, hTAF12 forms a histone fold that is very similar to that of histone H2B, yet unexpected differences are observed between the structures of the hTAF12 interaction domain of hTAF4 and histone H2A. Most importantly, the hTAF4 fragment forms only the first two helices of a classical histone fold, which are followed by a 26-residue disordered region. This indicates that either full-length TAF4 contains an unusually long connecting loop between its second and third helix, and this helix is not required for stable interaction with TAF12, or that TAF4 represents a novel class of partial histone fold motifs. Structural models and structure-based sequence alignments support a role for TAF4b and hSTAF42/yADA1 as alternative partners for TAF12 and are consistent with the formation of nucleosome-like histone-fold octamers through interaction of TAF12 with a TAF6-TAF9 tetramer, yet argue against involvement of TAF12-containing histone-fold pairs in DNA binding.


    Related Citations: 
    • The Human TFIID Components Tafii135 and Tafii20 and the Yeast Saga Components Ada1 and Tafii68 Heterodimerize to Form Histone-Like Pairs
      Gangloff, Y.-G.,Werten, S.,Romier, C.,Carre, L.,Poch, O.,Moras, D.,Davidson, I.
      (2000) Mol.Cell.Biol. 20: 340


    Organizational Affiliation

    Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/Université Louis Pasteur, Boîte Postale, B.P. 163 67404 Illkirch Cédex Communauté Urbaine de Strasbourg, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRANSCRIPTION INITIATION FACTOR TFIID 135 KDA SUBUNIT
A, C
75Homo sapiensGene Names: TAF4 (TAF2C, TAF2C1, TAF4A, TAFII130, TAFII135)
Find proteins for O00268 (Homo sapiens)
Go to Gene View: TAF4
Go to UniProtKB:  O00268
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TRANSCRIPTION INITIATION FACTOR TFIID 20/15 KDA SUBUNITS
B, D
76Homo sapiensGene Names: TAF12 (TAF15, TAF2J, TAFII20)
Find proteins for Q16514 (Homo sapiens)
Go to Gene View: TAF12
Go to UniProtKB:  Q16514
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.226 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 112.940α = 90.00
b = 36.825β = 97.85
c = 73.948γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
DENZOdata reduction
CNSrefinement
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-09-26
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance