2Z32

Crystal structure of Keap1 complexed with Prothymosin alpha


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural analysis of the complex of Keap1 with a prothymosin alpha peptide

Padmanabhan, B.Nakamura, Y.Yokoyama, S.

(2008) Acta Crystallogr.,Sect.F 64: 233-238

  • DOI: 10.1107/S1744309108004995

  • PubMed Abstract: 
  • The Nrf2 transcription factor, which plays important roles in oxidative and xenobiotic stress, is negatively regulated by the cytoplasmic repressor Keap1. The beta-propeller/Kelch domain of Keap1, which is formed by the double-glycine repeat and C-te ...

    The Nrf2 transcription factor, which plays important roles in oxidative and xenobiotic stress, is negatively regulated by the cytoplasmic repressor Keap1. The beta-propeller/Kelch domain of Keap1, which is formed by the double-glycine repeat and C-terminal region domains (Keap1-DC), interacts directly with the Neh2 domain of Nrf2. The nuclear oncoprotein prothymosin alpha (ProTalpha) also interacts directly with Keap1 and may play a role in the dissociation of the Keap1-Nrf2 complex. The structure of Keap1-DC complexed with a ProTalpha peptide (amino acids 39-54) has been determined at 1.9 A resolution. The Keap1-bound ProTalpha peptide possesses a hairpin conformation and binds to the Keap1 protein at the bottom region of the beta-propeller domain. Complex formation occurs as a consequence of their complementary electrostatic interactions. A comparison of the present structure with recently reported Keap1-DC complex structures revealed that the DLG and ETGE motifs of the Neh2 domain of Nrf2 and the ProTalpha peptide bind to Keap1 in a similar manner but with different binding potencies.


    Organizational Affiliation

    Genomic Sciences Center, Yokohama Institute, RIKEN, 1-7-22 Suehiro-cho, Tsurumi, Yokohama 230-0045, Japan. paddy@gsc.riken.jp




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Kelch-like ECH-associated protein 1
A
318Mus musculusMutation(s): 0 
Gene Names: Keap1 (Inrf2, Kiaa0132)
Find proteins for Q9Z2X8 (Mus musculus)
Go to UniProtKB:  Q9Z2X8
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Prothymosin alpha
B
16Mus musculusMutation(s): 0 
Gene Names: Ptma
Find proteins for P26350 (Mus musculus)
Go to UniProtKB:  P26350
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.166 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 103.515α = 90.00
b = 103.515β = 90.00
c = 56.160γ = 120.00
Software Package:
Software NamePurpose
MOLREPphasing
SCALEPACKdata scaling
REFMACrefinement
HKL-2000data reduction
ADSCdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-03-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance