Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 28.24 kDa 
• Atom Count: 1813 
• Modelled Residue Count: 228 
• Deposited Residue Count: 248 
• Unique protein chains: 2

1MBV

CRYSTAL STRUCTURE ANALYSIS OF ClpSN HETERODIMER TETRAGONAL FORM

• PDB DOI: 10.2210/pdb1MBV/pdb

• Classification: PROTEIN BINDING
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2002-08-03 Released: 2002-12-11 
• Deposition Author(s): Guo, F., Esser, L., Singh, S.K., Maurizi, M.R., Xia, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free: 0.280 
• R-Value Work: 0.257 

Literature

Crystal Structure of the Heterodimeric Complex of the Adaptor, ClpS, with the N-domain of AAA+ Chaperone ClpA

Guo, F., Esser, L., Singh, S.K., Maurizi, M.R., Xia, D.

(2002) J Biol Chem 277: 46753-46762

• PubMed: 12235156 
• DOI: 10.1074/jbc.M208104200
• Primary Citation of Related Structures:  
  1MBU, 1MBV, 1MBX


• PubMed Abstract: 
  

Substrate selectivity and proteolytic activity for the E. coli ATP-dependent protease, ClpAP, is modulated by an adaptor protein, ClpS. ClpS binds to ClpA, the regulatory component of the ClpAP complex. We report the crystal structure of ClpS in complex with the isolated N-terminal domain of ClpA in two different crystal forms at 2.3- and 3.3-A resolution. The ClpS structure forms an alpha/beta-sandwich and is topologically analogous to the C-terminal domain of the ribosomal protein L7/L12. ClpS contacts two surfaces on the N-terminal domain in both crystal forms; the more extensive interface was shown to be favored in solution by protease protection experiments. The N-terminal 20 residues of ClpS are not visible in the crystal structures; the removal of the first 17 residues produces ClpSDeltaN, which binds to the ClpA N-domain but no longer inhibits ClpA activity. A zinc binding site involving two His and one Glu residue was identified crystallographically in the N-terminal domain of ClpA. In a model of ClpS bound to hexameric ClpA, ClpS is oriented with its N terminus directed toward the distal surface of ClpA, suggesting that the N-terminal region of ClpS may affect productive substrate interactions at the apical surface or substrate entry into the ClpA translocation channel.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ATP-Dependent clp Protease ATP-Binding Subunit clp A	A	142	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P0ABH9 (Escherichia coli (strain K12)) Explore P0ABH9  Go to UniProtKB:  P0ABH9

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Protein yljA	B	106	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P0A8Q6 (Escherichia coli (strain K12)) Explore P0A8Q6  Go to UniProtKB:  P0A8Q6

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.30 Å
• R-Value Free: 0.280 
• R-Value Work: 0.257 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 91.249	α = 90
b = 91.249	β = 90
c = 198.56	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
SCALEPACK	data scaling
MOLREP	phasing
CNS	refinement
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-08-03 
• Released Date: 2002-12-11 
Deposition Author(s): Guo, F., Esser, L., Singh, S.K., Maurizi, M.R., Xia, D.

Revision History  

• Version 1.0: 2002-12-11
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance