Truncated FtsH from A. aeolicus in R32

Experimental Data Snapshot

  • Resolution: 2.95 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.214 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Conformational flexibility of pore loop-1 gives insights into substrate translocation by the AAA+protease FtsH.

Uthoff, M.Baumann, U.

(2018) J Struct Biol 204: 199-206

  • DOI: https://doi.org/10.1016/j.jsb.2018.08.009
  • Primary Citation of Related Structures:  
    6GCN, 6GCO

  • PubMed Abstract: 

    Two crystal structures of a transmembrane helix-lacking FtsH construct from Aquifex aeolicus have been determined at 2.9 Å and 3.3 Å resolution in space groups R32 and P312, respectively. Both structures are virtually identical despite different crystal packing contacts. In both structures, the FtsH hexamer is created from two different subunits of the asymmetric unit by the threefold symmetry of the crystals. Similar to other published structures, all subunits are loaded with ADP and the two subunit in the asymmetric unit resemble the already known open and closed conformations. Within the ATPase cycle while the whole subunit switches from the opened to the closed state, pore loop-1 interacts with the substrate and translocates it into the proteolytic chamber. Unique to our models is a presumably inactive conformation of the pore loop which allows the closed conformation to switch back to the opened state without pushing the substrate out again. Our structures give further insights on how this new pore loop conformation is induced and how it is linked to the intersubunit signalling network.

  • Organizational Affiliation

    Institute of Biochemistry, University of Cologne, Zuelpicher Str. 47, Cologne, North Rhine-Westphalia 50674, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ATP-dependent zinc metalloprotease FtsH
A, B, C, D
479Aquifex aeolicus VF5Mutation(s): 0 
Gene Names: ftsHaq_936
EC: 3.4.24
Find proteins for O67077 (Aquifex aeolicus (strain VF5))
Explore O67077 
Go to UniProtKB:  O67077
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO67077
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on ADP

Download Ideal Coordinates CCD File 
E [auth A],
G [auth B],
K [auth C],
M [auth D]
C10 H15 N5 O10 P2
Query on ALA

Download Ideal Coordinates CCD File 
I [auth B],
J [auth B]
C3 H7 N O2
Query on ZN

Download Ideal Coordinates CCD File 
F [auth A],
H [auth B],
L [auth C],
N [auth D]
Experimental Data & Validation

Experimental Data

  • Resolution: 2.95 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.214 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 197.55α = 90
b = 197.55β = 90
c = 323.92γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-08-22
    Type: Initial release
  • Version 1.1: 2018-08-29
    Changes: Data collection, Database references
  • Version 1.2: 2018-10-10
    Changes: Data collection, Database references
  • Version 1.3: 2024-05-01
    Changes: Data collection, Database references, Derived calculations, Refinement description