Crystal structure of human REDD1, a hypoxia-induced regulator of mTOR

Experimental Data Snapshot

  • Resolution: 2.00 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 

wwPDB Validation   3D Report Full Report

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Structural analysis and functional implications of the negative mTORC1 regulator REDD1.

Vega-Rubin-de-Celis, S.Abdallah, Z.Kinch, L.Grishin, N.V.Brugarolas, J.Zhang, X.

(2010) Biochemistry 49: 2491-2501

  • DOI: https://doi.org/10.1021/bi902135e
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    REDD1 is a conserved stress-response protein that regulates mTORC1, a critical regulator of cell growth and proliferation that is implicated in cancer. REDD1 is induced by hypoxia, and REDD1 overexpression is sufficient to inhibit mTORC1. mTORC1 is regulated by the small GTPase Rheb, which in turn is regulated by the GTPase-activating protein complex, TSC1/TSC2. REDD1 induced-mTORC1 inhibition requires the TSC1/TSC2 complex, and REDD1 has been proposed to act by directly binding to and sequestering 14-3-3 proteins away from TSC2 leading to TSC2-dependent inhibition of mTORC1. Structure/function analyses have led us to identify two segments in REDD1 that are essential for function, which act in an interdependent manner. We have determined a crystal structure of REDD1 at 2.0 A resolution, which shows that these two segments fold together to form an intact domain with a novel fold. This domain is characterized by an alpha/beta sandwich consisting of two antiparallel alpha-helices and a mixed beta-sheet encompassing an uncommon psi-loop motif. Structure-based docking and functional analyses suggest that REDD1 does not directly bind to 14-3-3 proteins. Sequence conservation mapping to the surface of the structure and mutagenesis studies demarcated a hotspot likely to interact with effector proteins that is essential for REDD1-mediated mTORC1 inhibition.

  • Organizational Affiliation

    Department of Developmental Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA-damage-inducible transcript 4 protein
A, B
134Homo sapiensMutation(s): 0 
Gene Names: DDIT4REDD1RTP801
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NX09 (Homo sapiens)
Explore Q9NX09 
Go to UniProtKB:  Q9NX09
GTEx:  ENSG00000168209 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NX09
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
A, B
Experimental Data & Validation

Experimental Data

  • Resolution: 2.00 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.179 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 33.331α = 77.56
b = 36.586β = 89.08
c = 47.97γ = 86.18
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
ADSCdata collection

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-03-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2016-12-21
    Changes: Structure summary
  • Version 1.3: 2017-11-01
    Changes: Refinement description