Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 15.77 kDa 
• Atom Count: 1075 
• Modelled Residue Count: 137 
• Deposited Residue Count: 137 
• Unique protein chains: 2

2KA6

NMR structure of the CBP-TAZ2/STAT1-TAD complex

• PDB DOI: 10.2210/pdb2KA6/pdb
• BMRB: 16015

• Classification: TRANSCRIPTION REGULATOR
• Organism(s): Mus musculus, Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2008-10-30 Released: 2009-04-07 
• Deposition Author(s): Wojciak, J.M., Martinez-Yamout, M.A., Dyson, H.J., Wright, P.E.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Structural basis for recruitment of CBP/p300 coactivators by STAT1 and STAT2 transactivation domains.

Wojciak, J.M., Martinez-Yamout, M.A., Dyson, H.J., Wright, P.E.

(2009) EMBO J 28: 948-958

• PubMed: 19214187 
• DOI: 10.1038/emboj.2009.30
• Primary Citation of Related Structures:  
  2KA4, 2KA6


• PubMed Abstract: 
  

CBP/p300 transcriptional coactivators mediate gene expression by integrating cellular signals through interactions with multiple transcription factors. To elucidate the molecular and structural basis for CBP-dependent gene expression, we determined structures of the CBP TAZ1 and TAZ2 domains in complex with the transactivation domains (TADs) of signal transducer and activator of transcription 2 (STAT2) and STAT1, respectively. Despite the topological similarity of the TAZ1 and TAZ2 domains, subtle differences in helix packing and surface grooves constitute major determinants of target selectivity. Our results suggest that TAZ1 preferentially binds long TADs capable of contacting multiple surface grooves simultaneously, whereas smaller TADs that are restricted to a single contiguous binding surface form complexes with TAZ2. Complex formation for both STAT TADs involves coupled folding and binding, driven by intermolecular hydrophobic and electrostatic interactions. Phosphorylation of S727, required for maximal transcriptional activity of STAT1, does not enhance binding to any of the CBP domains. Because the different STAT TADs recognize different regions of CBP/p300, there is a potential for multivalent binding by STAT heterodimers that could enhance the recruitment of the coactivators to promoters.

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Organizational Affiliation: 

Department of Molecular Biology, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CREB-binding protein	A	92	Mus musculus	Mutation(s): 2  Gene Names: Cbp, Crebbp EC: 2.3.1.48 (PDB Primary Data), 2.3.1 (UniProt)
UniProt
Find proteins for P45481 (Mus musculus) Explore P45481  Go to UniProtKB:  P45481

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Signal transducer and activator of transcription 1-alpha/beta	B	45	Homo sapiens	Mutation(s): 0  Gene Names: STAT1
UniProt & NIH Common Fund Data Resources
Find proteins for P42224 (Homo sapiens) Explore P42224  Go to UniProtKB:  P42224
PHAROS:  P42224

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	C [auth A], D [auth A], E [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2KA6 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-10-30 
• Released Date: 2009-04-07 
Deposition Author(s): Wojciak, J.M., Martinez-Yamout, M.A., Dyson, H.J., Wright, P.E.

Revision History  

• Version 1.0: 2009-04-07
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2020-02-19
  Changes: Data collection, Database references, Derived calculations, Other
• Version 1.3: 2021-10-20
  Changes: Database references, Derived calculations