Whole cytosolic region of ATP-dependent metalloprotease FtsH (G399L)

Experimental Data Snapshot

  • Resolution: 3.90 Å
  • R-Value Free: 0.342 
  • R-Value Work: 0.299 
  • R-Value Observed: 0.301 

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Structure of the Whole Cytosolic Region of ATP-Dependent Protease FtsH

Suno, R.Niwa, H.Tsuchiya, D.Zhang, X.Yoshida, M.Morikawa, K.

(2006) Mol Cell 22: 575-585

  • DOI: https://doi.org/10.1016/j.molcel.2006.04.020
  • Primary Citation of Related Structures:  
    2DHR, 2DI4, 4EIW

  • PubMed Abstract: 

    An ATP-dependent protease, FtsH, digests misassembled membrane proteins in order to maintain membrane integrity and digests short-lived soluble proteins in order to control their cellular regulation. This enzyme has an N-terminal transmembrane segment and a C-terminal cytosolic region consisting of an AAA+ ATPase domain and a protease domain. Here we present two crystal structures: the protease domain and the whole cytosolic region. The cytosolic region fully retains an ATP-dependent protease activity and adopts a three-fold-symmetric hexameric structure. The protease domains displayed a six-fold symmetry, while the AAA+ domains, each containing ADP, alternate two orientations relative to the protease domain, making "open" and "closed" interdomain contacts. Apparently, ATPase is active only in the closed form, and protease operates in the open form. The protease catalytic sites are accessible only through a tunnel following from the AAA+ domain of the adjacent subunit, raising a possibility of translocation of polypeptide substrate to the protease sites through this tunnel.

  • Organizational Affiliation

    Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Yokohama 226-8503, Japan.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F
499Thermus thermophilusMutation(s): 1 
Find proteins for Q5SI82 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
Explore Q5SI82 
Go to UniProtKB:  Q5SI82
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5SI82
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.90 Å
  • R-Value Free: 0.342 
  • R-Value Work: 0.299 
  • R-Value Observed: 0.301 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 146.153α = 90
b = 146.153β = 90
c = 349.064γ = 120
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
CCP4data scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-06-27
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-11-10
    Changes: Database references, Derived calculations