1P4Q

Solution structure of the CITED2 transactivation domain in complex with the p300 CH1 domain


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 25 
  • Conformers Submitted: 17 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural basis for negative regulation of hypoxia-inducible factor-1alpha by CITED2.

Freedman, S.J.Sun, Z.Y.Kung, A.L.France, D.S.Wagner, G.Eck, M.J.

(2003) Nat Struct Biol 10: 504-512

  • DOI: 10.1038/nsb936
  • Primary Citation of Related Structures:  
    1P4Q

  • PubMed Abstract: 
  • Expression of hypoxia-responsive genes is mediated by the heterodimeric transcription factor hypoxia-inducible factor-1 (HIF-1) in complex with the p300/CREB-binding protein (p300/CBP) transcriptional coactivator. The protein CITED2, which binds p300 ...

    Expression of hypoxia-responsive genes is mediated by the heterodimeric transcription factor hypoxia-inducible factor-1 (HIF-1) in complex with the p300/CREB-binding protein (p300/CBP) transcriptional coactivator. The protein CITED2, which binds p300/CBP, is thought to be a negative regulator of HIF-1 transactivation. We show that the CITED2 transactivation domain (TAD) disrupts a complex of the HIF-1alpha C-terminal TAD (C-TAD) and the cysteine-histidine-rich 1 (CH1) domain of p300/CBP by binding CH1 with high affinity. The high-resolution solution structure of the CITED2 TAD-p300 CH1 complex shows that the CITED2 TAD, like the HIF-1alpha C-TAD, folds on a helical, Zn2+-containing CH1 scaffold. The CITED2 TAD binds a different, more extensive surface of CH1 than does the HIF-1alpha C-TAD. However, a conserved 'LPXL' sequence motif in CITED2 and HIF-1alpha interacts with an overlapping binding site on CH1. Mutation of the LPEL sequence in full-length CITED2 abolishes p300 binding in vivo. These findings reveal that CITED2 regulates HIF-1 by competing for a hot spot on the p300 CH1 domain.


    Related Citations: 
    • Structural basis for recruitment of CBP/p300 by hypoxia-inducible factor-1alpha
      (2002) Proc Natl Acad Sci U S A 99: 5367

    Organizational Affiliation

    Division of Hemostasis and Thrombosis, Beth Israel Deaconess Medical Center, 41 Avenue Louis Pasteur, Boston, Massachusetts 02115, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cbp/p300-interacting transactivator 2A52Homo sapiensMutation(s): 0 
Gene Names: CITED2 OR MRG1CITED2MRG1
Find proteins for Q99967 (Homo sapiens)
Explore Q99967 
Go to UniProtKB:  Q99967
NIH Common Fund Data Resources
PHAROS  Q99967
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
E1A-associated protein p300B101Homo sapiensMutation(s): 0 
Gene Names: EP300 OR P300EP300P300
EC: 2.3.1.48 (PDB Primary Data), 2.3.1 (UniProt)
Find proteins for Q09472 (Homo sapiens)
Explore Q09472 
Go to UniProtKB:  Q09472
NIH Common Fund Data Resources
PHAROS  Q09472
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download CCD File 
B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 25 
  • Conformers Submitted: 17 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 1P4Q Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-07-01
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-02-01
    Changes: Structure summary