1TG6

Crystallography and mutagenesis point to an essential role for the N-terminus of human mitochondrial ClpP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.224 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Crystallography and mutagenesis point to an essential role for the N-terminus of human mitochondrial ClpP

Kang, S.G.Maurizi, M.R.Thompson, M.Mueser, T.Ahvazi, B.

(2004) J.Struct.Biol. 148: 338-352

  • DOI: 10.1016/j.jsb.2004.07.004

  • PubMed Abstract: 
  • We have determined a 2.1 A crystal structure for human mitochondrial ClpP (hClpP), the proteolytic component of the ATP-dependent ClpXP protease. HClpP has a structure similar to that of the bacterial enzyme, with the proteolytic active sites sequest ...

    We have determined a 2.1 A crystal structure for human mitochondrial ClpP (hClpP), the proteolytic component of the ATP-dependent ClpXP protease. HClpP has a structure similar to that of the bacterial enzyme, with the proteolytic active sites sequestered within an aqueous chamber formed by face-to-face assembly of the two heptameric rings. The hydrophobic N-terminal peptides of the subunits are bound within the narrow (12 A) axial channel, positioned to interact with unfolded substrates translocated there by the associated ClpX chaperone. Mutation or deletion of these residues causes a drastic decrease in ClpX-mediated protein and peptide degradation. Residues 8-16 form a mobile loop that extends above the ring surface and is also required for activity. The 28 amino acid C-terminal domain, a unique feature of mammalian ClpP proteins, lies on the periphery of the ring, with its proximal portion forming a loop that extends out from the ring surface. Residues at the start of the C-terminal domain impinge on subunit interfaces within the ring and affect heptamer assembly and stability. We propose that the N-terminal peptide of ClpP is a structural component of the substrate translocation channel and may play an important functional role as well.


    Related Citations: 
    • Sequence and structure of ClpP, the proteolytic component of the ATP-dependent Clp protease of Escherichia Coli
      Maurizi, M.R.,Clark, W.P.,Katayama, Y.,Rudikoff, S.,Pumphrey, J.,Bowers, B.,Gottesman, S.
      (1990) J.Biol.Chem. 265: 12536


    Organizational Affiliation

    Laboratory of Cell Biology, National Cancer Institute, Bethesda, MD 20892-4255, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative ATP-dependent Clp protease proteolytic subunit
A, B, C, D, E, F, G
277Homo sapiensGene Names: CLPP
EC: 3.4.21.92
Find proteins for Q16740 (Homo sapiens)
Go to Gene View: CLPP
Go to UniProtKB:  Q16740
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
B, C, D, E, F
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
FME
Query on FME

Download SDF File 
Download CCD File 
D
N-FORMYLMETHIONINE
C6 H11 N O3 S
PYUSHNKNPOHWEZ-YFKPBYRVSA-N
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A, B, C, D, F, G
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
DIO
Query on DIO

Download SDF File 
Download CCD File 
A, B, D, E, F, G
1,4-DIETHYLENE DIOXIDE
C4 H8 O2
RYHBNJHYFVUHQT-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.224 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 162.570α = 90.00
b = 119.002β = 130.16
c = 118.650γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
SCALEPACKdata scaling
HKL-2000data collection
CNSrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-03-22
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance
  • Version 1.3: 2016-11-30
    Type: Other
  • Version 1.4: 2018-01-31
    Type: Experimental preparation