Biological Assembly 1  

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: homology

Macromolecule Content

• Total Structure Weight: 43.57 kDa 
• Atom Count: 2,404 
• Modelled Residue Count: 233 
• Deposited Residue Count: 318 
• Unique protein chains: 2
• Unique nucleic acid chains: 1

 5ZKO

Crystal structure of the CRTC2-CREB-CRE complex

• PDB DOI:  https://doi.org/10.2210/pdb5ZKO/pdb
• NDB: 5ZKO

• Classification: TRANSCRIPTION/DNA
• Organism(s): Homo sapiens, synthetic construct, Mus musculus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2018-03-24 Released: 2018-06-20 
• Deposition Author(s): Xiang, S., Zhai, L., Valecia-Swain, J.
• Funding Organization(s): National Natural Science Foundation of China

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.05 Å
• R-Value Free: 0.285 
• R-Value Work: 0.242 
• R-Value Observed: 0.244 

Literature

Structural Insights into the CRTC2-CREB Complex Assembly on CRE.

Song, Y., Zhai, L., Valencia Swain, J., Chen, Y., Wang, P., Chen, L., Liu, Y., Xiang, S.

(2018) J Mol Biol 430: 1926-1939

• PubMed: 29733854 
• DOI: https://doi.org/10.1016/j.jmb.2018.04.038
• Primary Citation of Related Structures:  
  5ZK1, 5ZKO


• PubMed Abstract: 
  

The cAMP response element (CRE) binding protein (CREB) is central in the transcription regulation by cAMP, and the CREB-regulated transcriptional coactivators (CRTCs) play critical roles in CREB-mediated transcription activation. Upon stimulation, CRTCs translocate into the nucleus and complex with CREB on CRE promoters to activate target gene transcription. Their physiological importance is underscored by their function in energy balance, long-term memory, longevity and other processes. The CREB binding domain on CRTCs has been mapped, which interacts with the CREB basic leucine zipper domain that also mediates interaction with CRE-containing DNA. We report here crystal structures of a complex containing the CRTC2 CREB binding domain, the CREB basic leucine zipper domain and a CRE-containing DNA. The structures revealed that CRTC and CREB form a 2:2 complex on CRE-containing DNA, and CRTC interacts with both CREB and DNA through highly conserved residues. Structure-guided functional studies revealed that both interactions are crucial for the complex assembly and CREB stabilization on DNA. Interestingly, we found that the CRTC-DNA interaction confers selectivity toward the intrinsic DNA shape, which may play a role in selective transcription activation of the CRE genes.

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Organizational Affiliation: 

Key Laboratory of Nutrition and Metabolism, Shanghai Institutes for Biological Sciences, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 320 Yueyang Road, Shanghai 200031, P.R. China. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cyclic AMP-responsive element-binding protein 1	A, C	59	Homo sapiens	Mutation(s): 0  Gene Names: CREB1
UniProt & NIH Common Fund Data Resources
Find proteins for P16220 (Homo sapiens) Explore P16220  Go to UniProtKB:  P16220
PHAROS:  P16220

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
CREB-regulated transcription coactivator 2	E [auth G], F [auth H]	80	Mus musculus	Mutation(s): 0  Gene Names: Crtc2, Torc2
UniProt
Find proteins for Q3U182 (Mus musculus) Explore Q3U182  Go to UniProtKB:  Q3U182

Entity ID: 2
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*CP*TP*TP*GP*GP*CP*TP*GP*AP*CP*GP*TP*CP*AP*GP*CP*CP*AP*AP*G)-3')	B, D	20	synthetic construct

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.05 Å
• R-Value Free: 0.285 
• R-Value Work: 0.242 
• R-Value Observed: 0.244 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 50.3	α = 90
b = 41.32	β = 90.61
c = 122.58	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2018-06-20 
Deposition Author(s): Xiang, S., Zhai, L., Valecia-Swain, J.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China	China	31570743

Revision History  

• Version 1.0: 2018-06-20
  Type: Initial release