1MU4

CRYSTAL STRUCTURE AT 1.8 ANGSTROMS OF THE BACILLUS SUBTILIS CATABOLITE REPRESSION HISTIDINE CONTAINING PROTEIN (CRH)

• PDB DOI: https://doi.org/10.2210/pdb1MU4/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Bacillus subtilis
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2002-09-23 Released: 2003-10-07 
• Deposition Author(s): Juy, M.R., Haser, R.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.197 
• R-Value Work: 0.179 
• R-Value Observed: 0.179 

Literature

Dimerization of Crh by reversible 3D Domain Swapping Induces Structural Adjustments to its monomeric homologue HPR

Juy, M.R., Penin, F., Favier, A., Galinier, A., Montserret, R., Haser, R., Deutscher, J., Bockmann, A.

(2003) J Mol Biol 332: 767-776

• PubMed: 12972249 
• DOI: https://doi.org/10.1016/s0022-2836(03)00918-5
• Primary Citation of Related Structures:  
  1MU4


• PubMed Abstract: 
  

  The crystal structure of the regulatory protein Crh from Bacillus subtilis was solved at 1.8A resolution and showed an intertwined dimer formed by N-terminal beta1-strand swapping of two monomers. Comparison with the monomeric NMR structure of Crh revealed a domain swap induced conformational rearrangement of the putative interaction site with the repressor CcpA. The resulting conformation closely resembles that observed for the monomeric Crh homologue HPr, indicating that the Crh dimer is the active form binding to CcpA. An analogous dimer of HPr can be constructed without domain swapping, suggesting that HPr may dimerize upon binding to CcpA. Our data suggest that reversible 3D domain swapping of Crh might be an efficient regulatory mechanism to modulate its activity.

---

Organizational Affiliation: 

Institut de Biologie et Chimie des Protéines, C.N.R.S UMR 5086, 69367 Cedex 07, Lyon, France.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 19.44 kDa 
• Atom Count: 1,467 
• Modelled Residue Count: 173 
• Deposited Residue Count: 174 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HPr-like protein crh	A, B	87	Bacillus subtilis	Mutation(s): 0
UniProt
Find proteins for O06976 (Bacillus subtilis (strain 168)) Explore O06976  Go to UniProtKB:  O06976

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A], D [auth B], E [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.197 
• R-Value Work: 0.179 
• R-Value Observed: 0.179 
• Space Group: P 4₃ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 68.85	α = 90
b = 68.85	β = 90
c = 119.86	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-10-07 
Deposition Author(s): Juy, M.R., Haser, R.

Revision History  

• Version 1.0: 2003-10-07
  Type: Initial release
  
• Version 1.1: 2008-04-28
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2024-02-14
  Changes: Data collection, Database references, Derived calculations, Refinement description