2AGH

Structural basis for cooperative transcription factor binding to the CBP coactivator

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Structural Basis for Cooperative Transcription Factor Binding to the CBP Coactivator

De Guzman, R.N., Goto, N.K., Dyson, H.J., Wright, P.E.

(2006) J.Mol.Biol. 355: 1005-1013

  • DOI: 10.1016/j.jmb.2005.09.059

  • PubMed Abstract: 

    • Regulation of transcription requires interactions between transcriptional activators and transcriptional co-activator CREB binding protein (CBP). The KIX domain of CBP can bind simultaneously to two different proteins, providing an additional mechani ...

    Regulation of transcription requires interactions between transcriptional activators and transcriptional co-activator CREB binding protein (CBP). The KIX domain of CBP can bind simultaneously to two different proteins, providing an additional mechanism for transcriptional regulation. Here we describe the solution structure of the ternary complex formed by cooperative binding of activation domains from the c-Myb and mixed lineage leukemia (MLL) transcription factors to the KIX domain. The MLL and c-Myb domains form helices that bind to two distinct hydrophobic grooves on opposite faces of KIX. Compared to the binary KIX:c-Myb complex, significant changes are observed in the structure of KIX at the MLL binding interface in the ternary complex. Two regions of KIX that are disordered in the binary complex become structured in the ternary complex: a flexible loop forms intimate contacts with bound MLL, and the C-terminal helix is extended and stabilized by MLL binding. This structural change results in the formation of additional electrostatic/polar interactions between KIX and the bound c-Myb, providing a structural basis for the cooperativity observed for the ternary complex.

    Organizational Affiliation: 

    Department of Molecular Biology MB2, The Scripps Research Institute 10550 North Torrey Pines Road, La Jolla, CA 92037, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Myb proto-oncogene protein
A
25Mus musculusMutation(s): 0 
Gene Names: Myb
Find proteins for P06876 (Mus musculus)
Go to UniProtKB:  P06876
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Crebbp protein
B
87Mus musculusMutation(s): 0 
Gene Names: Crebbp (Cbp)
EC: 2.3.1.48
Find proteins for P45481 (Mus musculus)
Go to UniProtKB:  P45481
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Zinc finger protein HRX
C
31Homo sapiensMutation(s): 0 
Gene Names: KMT2A (ALL1, CXXC7, HRX, HTRX, MLL, MLL1, TRX1)
EC: 2.1.1.43
Find proteins for Q03164 (Homo sapiens)
Go to Gene View: KMT2A
Go to UniProtKB:  Q03164
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-11-22
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance