5F74

Crystal structure of ChREBP:14-3-3 complex bound with AMP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Metabolite Regulation of Nuclear Localization of Carbohydrate-response Element-binding Protein (ChREBP): ROLE OF AMP AS AN ALLOSTERIC INHIBITOR.

Sato, S.Jung, H.Nakagawa, T.Pawlosky, R.Takeshima, T.Lee, W.R.Sakiyama, H.Laxman, S.Wynn, R.M.Tu, B.P.MacMillan, J.B.De Brabander, J.K.Veech, R.L.Uyeda, K.

(2016) J.Biol.Chem. 291: 10515-10527

  • DOI: 10.1074/jbc.M115.708982

  • PubMed Abstract: 
  • The carbohydrate-response element-binding protein (ChREBP) is a glucose-responsive transcription factor that plays an essential role in converting excess carbohydrate to fat storage in the liver. In response to glucose levels, ChREBP is regulated by ...

    The carbohydrate-response element-binding protein (ChREBP) is a glucose-responsive transcription factor that plays an essential role in converting excess carbohydrate to fat storage in the liver. In response to glucose levels, ChREBP is regulated by nuclear/cytosol trafficking via interaction with 14-3-3 proteins, CRM-1 (exportin-1 or XPO-1), or importins. Nuclear localization of ChREBP was rapidly inhibited when incubated in branched-chain α-ketoacids, saturated and unsaturated fatty acids, or 5-aminoimidazole-4-carboxamide ribonucleotide. Here, we discovered that protein-free extracts of high fat-fed livers contained, in addition to ketone bodies, a new metabolite, identified as AMP, which specifically activates the interaction between ChREBP and 14-3-3. The crystal structure showed that AMP binds directly to the N terminus of ChREBP-α2 helix. Our results suggest that AMP inhibits the nuclear localization of ChREBP through an allosteric activation of ChREBP/14-3-3 interactions and not by activation of AMPK. AMP and ketone bodies together can therefore inhibit lipogenesis by restricting localization of ChREBP to the cytoplasm during periods of ketosis.


    Organizational Affiliation

    From the Department of Biochemistry, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75390.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
14-3-3 protein beta/alpha
A
246Mus musculusMutation(s): 0 
Gene Names: Ywhab
Find proteins for Q9CQV8 (Mus musculus)
Go to UniProtKB:  Q9CQV8
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Carbohydrate-responsive element-binding protein
B
196Rattus norvegicusMutation(s): 0 
Gene Names: Mlxipl (Wbscr14)
Find proteins for Q8VIP2 (Rattus norvegicus)
Go to UniProtKB:  Q8VIP2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AMP
Query on AMP

Download SDF File 
Download CCD File 
A
ADENOSINE MONOPHOSPHATE
C10 H14 N5 O7 P
UDMBCSSLTHHNCD-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.188 
  • Space Group: P 42 2 2
Unit Cell:
Length (Å)Angle (°)
a = 115.620α = 90.00
b = 115.620β = 90.00
c = 59.372γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
HKL-3000data reduction
HKL-3000data scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2015-12-07 
  • Released Date: 2016-03-23 
  • Deposition Author(s): Jung, H., Uyeda, K.

Revision History 

  • Version 1.0: 2016-03-23
    Type: Initial release
  • Version 1.1: 2016-03-30
    Type: Database references
  • Version 1.2: 2016-06-01
    Type: Database references