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Title: Activator Protein-1: redox switch controlling structure and DNA-binding

Journal Article · · Nucleic Acids Research
DOI:https://doi.org/10.1093/nar/gkx795· OSTI ID:1409105
 [1];  [1];  [2];  [1]
  1. Texas A & M Univ. at Galveston, TX (United States)
  2. Icahn School of Medicine at Mount Sinai, New York, NY (United States)

The transcription factor, activator protein-1 (AP-1), binds to cognate DNA under redox control; yet, the underlying mechanism has remained enigmatic. A series of crystal structures of the AP-1 FosB/JunD bZIP domains reveal ordered DNA-binding regions in both FosB and JunD even in absence DNA. However, while JunD is competent to bind DNA, the FosB bZIP domain must undergo a large conformational rearrangement that is controlled by a ‘redox switch’ centered on an inter-molecular disulfide bond. Solution studies confirm that FosB/JunD cannot undergo structural transition and bind DNA when the redox-switch is in the ‘OFF’ state, and show that the mid-point redox potential of the redox switch affords it sensitivity to cellular redox homeostasis. The molecular and structural studies presented here thus reveal the mechanism underlying redox-regulation of AP-1 Fos/Jun transcription factors and provide structural insight for therapeutic interventions targeting AP-1 proteins.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
R01 DA040621
OSTI ID:
1409105
Journal Information:
Nucleic Acids Research, Vol. 45, Issue 19; ISSN 0305-1048
Publisher:
Oxford University PressCopyright Statement
Country of Publication:
United States
Language:
ENGLISH
Citation Metrics:
Cited by: 32 works
Citation information provided by
Web of Science

References (41)

Redox Control of Protein–DNA Interactions: From Molecular Mechanisms to Significance in Signal Transduction, Gene Expression, and DNA Replication journal November 2010
Redox regulation of fos and jun DNA-binding activity in vitro journal September 1990
AP-1 as a regulator of cell life and death journal May 2002
Crystal structure of the heterodimeric bZIP transcription factor c-Fos–c-Jun bound to DNA journal January 1995
Parallel association of Fos and Jun leucine zippers juxtaposes DNA binding domains journal March 1989
Altered protein conformation on DNA binding by Fos and Jun journal October 1990
Coupling of folding and DNA-binding in the bZIP domains of Jun–Fos heterodimeric transcription factor journal May 2008
N-Terminal Segments Modulate the α-Helical Propensities of the Intrinsically Disordered Basic Regions of bZIP Proteins journal February 2012
Transcriptional mechanisms of addiction: role of ΔFosB journal July 2008
[20] Processing of X-ray diffraction data collected in oscillation mode book January 1997
Phaser crystallographic software journal July 2007
PHENIX: a comprehensive Python-based system for macromolecular structure solution journal January 2010
Coot model-building tools for molecular graphics journal November 2004
PHENIX : building new software for automated crystallographic structure determination journal October 2002
Optimal description of a protein structure in terms of multiple groups undergoing TLS motion journal March 2006
MolProbity : all-atom structure validation for macromolecular crystallography journal December 2009
Presenting your structures: the CCP 4 mg molecular-graphics software journal March 2011
UCSF Chimera?A visualization system for exploratory research and analysis journal January 2004
COBALT: constraint-based alignment tool for multiple protein sequences journal March 2007
Redox Potential and Peroxide Reactivity of Human Peroxiredoxin 3 journal July 2009
Parameters of helix-coil transition theory for alanine-based peptides of varying chain lengths in water journal November 1991
The monomer-dimer equilibrium of stromal cell-derived factor-1 (CXCL 12) is altered by pH, phosphate, sulfate, and heparin journal March 2005
Ligand binding assays at equilibrium: validation and interpretation: Equilibrium binding assays journal February 2010
On the analysis of protein self-association by sedimentation velocity analytical ultracentrifugation journal September 2003
Macromolecular Size-and-Shape Distributions by Sedimentation Velocity Analytical Ultracentrifugation journal June 2006
Structural basis of DNA bending and oriented heterodimer binding by the basic leucine zipper domains of Fos and Jun journal May 1997
Two cysteine residues in the DNA-binding domain of CREB control binding to CRE and CREB-mediated gene expression journal November 2001
Folding transition in the DMA-binding domain of GCN4 on specific binding to DNA journal October 1990
X-ray structure of the GCN4 leucine zipper, a two-stranded, parallel coiled coil journal October 1991
Oxidized redox state of glutathione in the endoplasmic reticulum journal September 1992
Identification and characterization of Ref-1, a nuclear protein that facilitates AP-1 DNA-binding activity. journal February 1992
Redox activation of Fos-Jun DNA binding activity is mediated by a DNA repair enzyme. journal September 1992
Coactivator MBF1 preserves the redox-dependent AP-1 activity during oxidative stress in Drosophila journal August 2004
Differential roles for Fos and Jun in DNA-binding: redoxdependent and independent functions journal January 1993
JunD Reduces Tumor Angiogenesis by Protecting Cells from Oxidative Stress journal September 2004
Small Molecule Inhibitors Targeting Activator Protein 1 (AP-1): Miniperspective journal May 2014
Treatment of arthritis with a selective inhibitor of c-Fos/activator protein-1 journal June 2008
Small Molecule Screening Identifies Regulators of the Transcription Factor ΔFosB journal April 2012
PHENIX: a comprehensive Python-based system for macromolecular structure solution. text January 2010
Size-Distribution Analysis of Macromolecules by Sedimentation Velocity Ultracentrifugation and Lamm Equation Modeling journal March 2000
Redox-Dependent Transcriptional Regulation journal November 2005

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