1TFB

NMR STUDIES OF HUMAN GENERAL TRANSCRIPTION FACTOR TFIIB: DYNAMICS AND INTERACTION WITH VP16 ACTIVATION DOMAIN, 20 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Human general transcription factor TFIIB: conformational variability and interaction with VP16 activation domain.

Hayashi, F.Ishima, R.Liu, D.Tong, K.I.Kim, S.Reinberg, D.Bagby, S.Ikura, M.

(1998) Biochemistry 37: 7941-7951

  • DOI: 10.1021/bi9801098

  • PubMed Abstract: 
  • Human TFIIB, an essential factor in transcription of protein-coding genes by RNA polymerase II, consists of an amino-terminal zinc binding domain (TFIIBn) connected by a linker of about 60 residues to a carboxy-terminal core domain (TFIIBc). The TFII ...

    Human TFIIB, an essential factor in transcription of protein-coding genes by RNA polymerase II, consists of an amino-terminal zinc binding domain (TFIIBn) connected by a linker of about 60 residues to a carboxy-terminal core domain (TFIIBc). The TFIIB core domain has two internally repeated motifs, each comprising five alpha-helices arranged as in the cyclin box. Compared to the crystal structure of TFIIBc in complex with TBP and a TATA-containing oligonucleotide, the NMR-derived solution structure of free TFIIBc is more compact, with a different repeat-repeat orientation and a significantly shorter first helix in the second repeat. Analysis of backbone 15N relaxation parameters indicates the presence of relatively large amplitude, nanosecond time-scale motions in the TFIIBc interrepeat linker and structural fluctuations throughout the backbone. Interaction of TFIIBc with the acidic activation domain of VP16 or with TFIIBn induces 1H-15N chemical shift and line width changes concentrated in the first repeat, interrepeat linker and the first helix of the second repeat. These results suggest that TFIIB is somewhat pliable and that the conformation of the C-terminal core domain can be modulated by interaction with the N-terminal zinc binding domain. Furthermore, binding of the VP16 activation domain may promote TFIIBc conformations primed for binding to a TBP-DNA complex.


    Related Citations: 
    • Crystal Structure of a TFIIB-TBP-TATA-Element Ternary Complex
      Nikolov, D.B.,Chen, H.,Halay, E.D.,Usheva, A.A.,Hisatake, K.,Lee, D.K.,Roeder, R.G.,Burley, S.K.
      (1995) Nature 377: 119
    • Solution Structure of the C-Terminal Core Domain of Human TFIIB: Similarity to Cyclin a and Interaction with TATA-Binding Protein
      Bagby, S.,Kim, S.,Maldonado, E.,Tong, K.I.,Reinberg, D.,Ikura, M.
      (1995) Cell 82: 857


    Organizational Affiliation

    Division of Molecular and Structural Biology, Ontario Cancer Institute, University of Toronto, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TFIIB
A
208Homo sapiensMutation(s): 0 
Gene Names: GTF2B (TF2B, TFIIB)
EC: 2.3.1.48
Find proteins for Q00403 (Homo sapiens)
Go to Gene View: GTF2B
Go to UniProtKB:  Q00403
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 20 
  • Olderado: 1TFB Olderado
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1996-11-14 
  • Released Date: 1997-03-12 
  • Deposition Author(s): Bagby, S., Ikura, M.

Revision History 

  • Version 1.0: 1997-03-12
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance