Macromolecule Content

• Total Structure Weight: 12.94 kDa 
• Atom Count: 907 
• Modelled Residue Count: 109 
• Deposited Residue Count: 109 
• Unique protein chains: 2

1KDX

KIX DOMAIN OF MOUSE CBP (CREB BINDING PROTEIN) IN COMPLEX WITH PHOSPHORYLATED KINASE INDUCIBLE DOMAIN (PKID) OF RAT CREB (CYCLIC AMP RESPONSE ELEMENT BINDING PROTEIN), NMR 17 STRUCTURES

• DOI: 10.2210/pdb1KDX/pdb

• Classification: TRANSCRIPTION REGULATION COMPLEX
• Organism(s): Mus musculus, Rattus norvegicus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 1997-09-16 Released: 1998-11-25 
• Deposition Author(s): Radhakrishnan, I., Perez-Alvarado, G.C., Dyson, H.J., Wright, P.E.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 40 
• Conformers Submitted: 17 
• Selection Criteria: LOWEST CONSTRAINT ENERGIES 

Literature

Solution structure of the KIX domain of CBP bound to the transactivation domain of CREB: a model for activator:coactivator interactions.

Radhakrishnan, I., Perez-Alvarado, G.C., Parker, D., Dyson, H.J., Montminy, M.R., Wright, P.E.

(1997) Cell 91: 741-752

• PubMed: 9413984 
• DOI: 10.1016/s0092-8674(00)80463-8
• Primary Citation of Related Structures:  
  1KDX


• PubMed Abstract: 
  

The nuclear factor CREB activates transcription of target genes in part through direct interactions with the KIX domain of the coactivator CBP in a phosphorylation-dependent manner. The solution structure of the complex formed by the phosphorylated kinase-inducible domain (pKID) of CREB with KIX reveals that pKID undergoes a coil-->helix folding transition upon binding to KIX, forming two alpha helices. The amphipathic helix alphaB of pKID interacts with a hydrophobic groove defined by helices alpha1 and alpha3 of KIX. The other pKID helix, alphaA, contacts a different face of the alpha3 helix. The phosphate group of the critical phosphoserine residue of pKID forms a hydrogen bond to the side chain of Tyr-658 of KIX. The structure provides a model for interactions between other transactivation domains and their targets.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CBP	A	81	Mus musculus	Mutation(s): 0  Gene Names: Crebbp, Cbp EC: 2.3.1.48 (UniProt), 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
CREB	B	28	Rattus norvegicus	Mutation(s): 1  Gene Names: Creb1, Creb-1
UniProt
Find proteins for P15337 (Rattus norvegicus) Explore P15337  Go to UniProtKB:  P15337

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
SEP	B	L-PEPTIDE LINKING	C3 H8 N O6 P		SER

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 40 
• Conformers Submitted: 17 
• Selection Criteria: LOWEST CONSTRAINT ENERGIES 
• OLDERADO: 1KDX Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-09-16 
• Released Date: 1998-11-25 
Deposition Author(s): Radhakrishnan, I., Perez-Alvarado, G.C., Dyson, H.J., Wright, P.E.

Revision History  

• Version 1.0: 1998-11-25
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance