Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 14.84 kDa 
• Atom Count: 1086 
• Residue Count: 123 
• Unique protein chains: 1

1DZ3

DOMAIN-SWAPPING IN THE SPORULATION RESPONSE REGULATOR SPO0A

• DOI: 10.2210/pdb1DZ3/pdb

• Classification: RESPONSE REGULATOR
• Organism(s): Geobacillus stearothermophilus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2000-02-15 Released: 2000-04-10 
• Deposition Author(s): Lewis, R.J., Brannigan, J.A., Muchova, K., Leonard, G., Barak, I., Wilkinson, A.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 0.266 
• R-Value Work: 0.208 
• R-Value Observed: 0.235 

Literature

Domain swapping in the sporulation response regulator Spo0A.

Lewis, R.J., Muchova, K., Brannigan, J.A., Barak, I., Leonard, G., Wilkinson, A.J.

(2000) J Mol Biol 297: 757-770

• PubMed: 10731426 
• DOI: 10.1006/jmbi.2000.3598
• Structures With Same Primary Citation


• PubMed Abstract: 
  

Adaptive responses of micro-organisms, such as chemotaxis and sporulation, are governed by two-component systems consisting of sensor kinases, that interpret environmental signals, and response regulators which activate the appropriate physiological responses. Signal transduction via response regulator proteins is mediated through transient phosphorylation of aspartic acid residues. In Spo0A, the key regulator of development (sporulation) in Bacillus, phosphorylation of the N-terminal receiver domain (N-Spo0A) at aspartate-55 switches on the transcription activation functions residing in the C-terminal effector domain. Here we report the crystal structure of N-Spo0A from Bacillus stearothermophilus at 1.6 A spacing, revealing a dimer formed by an alpha-helix swap. Comparison of this structure with the recently described structure of phosphorylated N-Spo0A shows that dimer formation results from a cis-trans isomerization of the Lys106--Pro107 peptide bond. The quaternary reorganization is associated with alterations in the active site stereochemistry which may have implications for signalling. Remarkably, this 3-D domain swapped N-Spo0A dimer has an identical topology to a hypothetical CheY-like dimer, recently proposed as an intermediate in the evolution of the family of periplasmic substrate binding proteins.

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Organizational Affiliation: 

Structural Biology Laboratory Department of Chemistry, University of York, York, YO10 5DD, UK.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Stage 0 sporulation protein A	A	130	Geobacillus stearothermophilus	Mutation(s): 0  Gene Names: spo0A
Find proteins for P52934 (Geobacillus stearothermophilus) Go to UniProtKB:  P52934

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	A	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 0.266 
• R-Value Work: 0.208 
• R-Value Observed: 0.235 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 59.024	α = 90
b = 59.024	β = 90
c = 66.97	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling
SOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-02-15 
• Released Date: 2000-04-10 
Deposition Author(s): Lewis, R.J., Brannigan, J.A., Muchova, K., Leonard, G., Barak, I., Wilkinson, A.J.

Revision History 

• Version 1.0: 2000-04-10
  Type: Initial release
  
• Version 1.1: 2011-05-07
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-06-20
  Changes: Advisory, Data collection, Database references, Source and taxonomy, Structure summary