4LJ9

ClpB NBD2 R621Q from T. thermophilus in complex with AMPPCP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Elements in nucleotide sensing and hydrolysis of the AAA+ disaggregation machine ClpB: a structure-based mechanistic dissection of a molecular motor

Zeymer, C.Barends, T.R.M.Werbeck, N.D.Schlichting, I.Reinstein, J.

(2014) Acta Crystallogr D Biol Crystallogr 70: 582-595

  • DOI: 10.1107/S1399004713030629
  • Primary Citation of Related Structures:  
    4LJ4, 4LJ5, 4LJ6, 4LJ7, 4LJ8, 4LJ9, 4LJA

  • PubMed Abstract: 
  • ATPases of the AAA+ superfamily are large oligomeric molecular machines that remodel their substrates by converting the energy from ATP hydrolysis into mechanical force. This study focuses on the molecular chaperone ClpB, the bacterial homologue of Hsp104, which reactivates aggregated proteins under cellular stress conditions ...

    ATPases of the AAA+ superfamily are large oligomeric molecular machines that remodel their substrates by converting the energy from ATP hydrolysis into mechanical force. This study focuses on the molecular chaperone ClpB, the bacterial homologue of Hsp104, which reactivates aggregated proteins under cellular stress conditions. Based on high-resolution crystal structures in different nucleotide states, mutational analysis and nucleotide-binding kinetics experiments, the ATPase cycle of the C-terminal nucleotide-binding domain (NBD2), one of the motor subunits of this AAA+ disaggregation machine, is dissected mechanistically. The results provide insights into nucleotide sensing, explaining how the conserved sensor 2 motif contributes to the discrimination between ADP and ATP binding. Furthermore, the role of a conserved active-site arginine (Arg621), which controls binding of the essential Mg2+ ion, is described. Finally, a hypothesis is presented as to how the ATPase activity is regulated by a conformational switch that involves the essential Walker A lysine. In the proposed model, an unusual side-chain conformation of this highly conserved residue stabilizes a catalytically inactive state, thereby avoiding unnecessary ATP hydrolysis.


    Organizational Affiliation

    Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Jahnstrasse 29, 69120 Heidelberg, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Chaperone protein ClpBA339Thermus thermophilus HB8Mutation(s): 1 
Gene Names: clpBTTHA1487
UniProt
Find proteins for Q9RA63 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
Explore Q9RA63 
Go to UniProtKB:  Q9RA63
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9RA63
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACP
Query on ACP

Download Ideal Coordinates CCD File 
B [auth A]PHOSPHOMETHYLPHOSPHONIC ACID ADENYLATE ESTER
C11 H18 N5 O12 P3
UFZTZBNSLXELAL-IOSLPCCCSA-N
 Ligand Interaction
MG
Query on MG

Download Ideal Coordinates CCD File 
C [auth A],
D [auth A]
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.64α = 90
b = 74.64β = 90
c = 119.68γ = 120
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
XDSdata reduction
XSCALEdata 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: 2014-02-12
    Type: Initial release
  • Version 1.1: 2014-04-09
    Changes: Database references
  • Version 1.2: 2017-11-15
    Changes: Refinement description