1KSF

Crystal Structure of ClpA, an HSP100 chaperone and regulator of ClpAP protease: Structural basis of differences in Function of the Two AAA+ ATPase domains


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.221 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of ClpA, an HSP100 chaperone and regulator of ClpAP protease

Guo, F.Maurizi, M.R.Esser, L.Xia, D.

(2002) J Biol Chem 277: 46743-46752

  • DOI: 10.1074/jbc.M207796200
  • Primary Citation of Related Structures:  
    1K6K, 1KSF

  • PubMed Abstract: 
  • Escherichia coli ClpA, an Hsp100/Clp chaperone and an integral component of the ATP-dependent ClpAP protease, participates in regulatory protein degradation and the dissolution and degradation of protein aggregates. The crystal structure of the ClpA subunit reveals an N-terminal domain with pseudo-twofold symmetry and two AAA(+) modules (D1 and D2) each consisting of a large and a small sub-domain with ADP bound in the sub-domain junction ...

    Escherichia coli ClpA, an Hsp100/Clp chaperone and an integral component of the ATP-dependent ClpAP protease, participates in regulatory protein degradation and the dissolution and degradation of protein aggregates. The crystal structure of the ClpA subunit reveals an N-terminal domain with pseudo-twofold symmetry and two AAA(+) modules (D1 and D2) each consisting of a large and a small sub-domain with ADP bound in the sub-domain junction. The N-terminal domain interacts with the D1 domain in a manner similar to adaptor-binding domains of other AAA(+) proteins. D1 and D2 are connected head-to-tail consistent with a cooperative and vectorial translocation of protein substrates. In a planar hexamer model of ClpA, built by assembling ClpA D1 and D2 into homohexameric rings of known structures of AAA(+) modules, the differences in D1-D1 and D2-D2 interfaces correlate with their respective contributions to hexamer stability and ATPase activity.


    Organizational Affiliation

    Laboratory of Cell Biology, Center for Cancer Research, NCI, National Institutes of Health, Bethesda, Maryland 20892, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ATP-DEPENDENT CLP PROTEASE ATP-BINDING SUBUNIT CLPAA [auth X]758Escherichia coliMutation(s): 1 
UniProt
Find proteins for P0ABH9 (Escherichia coli (strain K12))
Explore P0ABH9 
Go to UniProtKB:  P0ABH9
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP (Subject of Investigation/LOI)
Query on ADP

Download Ideal Coordinates CCD File 
G [auth X], H [auth X]ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
PGE
Query on PGE

Download Ideal Coordinates CCD File 
E [auth X], F [auth X]TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
MET
Query on MET

Download Ideal Coordinates CCD File 
D [auth X]METHIONINE
C5 H11 N O2 S
FFEARJCKVFRZRR-BYPYZUCNSA-N
 Ligand Interaction
IPA
Query on IPA

Download Ideal Coordinates CCD File 
I [auth X], J [auth X], K [auth X], L [auth X], M [auth X]ISOPROPYL ALCOHOL
C3 H8 O
KFZMGEQAYNKOFK-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.304 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.221 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 124.107α = 90
b = 124.107β = 90
c = 97.042γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CCP4model building
REFMACrefinement
CCP4phasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-09-27
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance