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
  • Primary Citation of Related Structures:  
    2AGH

  • 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 mechanism for transcriptional regulation ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Myb proto-oncogene proteinA25Mus musculusMutation(s): 0 
Gene Names: Myb
Find proteins for P06876 (Mus musculus)
Explore P06876 
Go to UniProtKB:  P06876
NIH Common Fund Data Resources
IMPC  MGI:97249
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Crebbp proteinB87Mus musculusMutation(s): 0 
Gene Names: CbpCrebbp
EC: 2.3.1.48 (UniProt), 2.3.1 (UniProt)
Find proteins for P45481 (Mus musculus)
Explore P45481 
Go to UniProtKB:  P45481
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Zinc finger protein HRXC31Homo sapiensMutation(s): 0 
Gene Names: MLLALL1HRXHTRXTRX1KMT2ACXXC7MLL1
EC: 2.1.1.354
Find proteins for Q03164 (Homo sapiens)
Explore Q03164 
Go to UniProtKB:  Q03164
NIH Common Fund Data Resources
PHAROS  Q03164
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • OLDERADO: 2AGH Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History 

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