3WU5

Reduced E.coli Lon Proteolytic domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.07 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A redox switch shapes the Lon protease exit pore to facultatively regulate proteolysis.

Nishii, W.Kukimoto-Niino, M.Terada, T.Shirouzu, M.Muramatsu, T.Kojima, M.Kihara, H.Yokoyama, S.

(2015) Nat. Chem. Biol. 11: 46-51

  • DOI: 10.1038/nchembio.1688
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The Lon AAA+ protease degrades damaged or misfolded proteins in its intramolecular chamber. Its activity must be precisely controlled, but the mechanism by which Lon is regulated in response to different environments is not known. Facultative anaerob ...

    The Lon AAA+ protease degrades damaged or misfolded proteins in its intramolecular chamber. Its activity must be precisely controlled, but the mechanism by which Lon is regulated in response to different environments is not known. Facultative anaerobes in the Enterobacteriaceae family, mostly symbionts and pathogens, encounter both anaerobic and aerobic environments inside and outside the host's body, respectively. The bacteria characteristically have two cysteine residues on the Lon protease (P) domain surface that unusually form a disulfide bond. Here we show that the cysteine residues act as a redox switch of Lon. Upon disulfide bond reduction, the exit pore of the P-domain ring narrows by ∼30%, thus interrupting product passage and decreasing activity by 80%; disulfide bonding by oxidation restores the pore size and activity. The redox switch (E°' = -227 mV) is appropriately tuned to respond to variation between anaerobic and aerobic conditions, thus optimizing the cellular proteolysis level for each environment.


    Organizational Affiliation

    1] RIKEN Systems and Structural Biology Center, Yokohama, Japan. [2] RIKEN Structural Biology Laboratory, Yokohama, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lon protease
A, B, C, D, E, F
200N/AMutation(s): 1 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B, C, D, E, F
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.07 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.183 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 86.350α = 90.00
b = 86.350β = 90.00
c = 124.375γ = 120.00
Software Package:
Software NamePurpose
PHENIXmodel building
PHENIXphasing
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-11-12
    Type: Initial release
  • Version 1.1: 2018-10-17
    Type: Data collection, Database references