1DBW

CRYSTAL STRUCTURE OF FIXJ-N

• PDB DOI: https://doi.org/10.2210/pdb1DBW/pdb

• Classification: TRANSCRIPTION
• Organism(s): Sinorhizobium meliloti
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 1999-11-03 Released: 1999-11-26 
• Deposition Author(s): Gouet, P., Fabry, B., Guillet, V., Birck, C., Mourey, L., Kahn, D., Samama, J.P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.224 
• R-Value Work: 0.187 
• R-Value Observed: 0.187 

Literature

Structural transitions in the FixJ receiver domain.

Gouet, P., Fabry, B., Guillet, V., Birck, C., Mourey, L., Kahn, D., Samama, J.P.

(1999) Structure 7: 1517-1526

• PubMed: 10647182 
• DOI: https://doi.org/10.1016/s0969-2126(00)88342-2
• Primary Citation of Related Structures:  
  1DBW, 1DCK, 1DCM


• PubMed Abstract: 
  

  Two-component signal transduction pathways are sophisticated phosphorelay cascades widespread in prokaryotes and also found in fungi, molds and plants. FixL/FixJ is a prototypical system responsible for the regulation of nitrogen fixation in the symbiotic bacterium Sinorhizobium meliloti. In microaerobic conditions the membrane-bound kinase FixL uses ATP to transphosphorylate a histidine residue, and the response regulator FixJ transfers the phosphoryl group from the phosphohistidine to one of its own aspartate residues in a Mg(2+)-dependent mechanism.

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Organizational Affiliation: 

Groupe de Cristallographie Biologique, CNRS-IPBS, Toulouse, France.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 29.29 kDa 
• Atom Count: 2,081 
• Modelled Residue Count: 248 
• Deposited Residue Count: 252 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TRANSCRIPTIONAL REGULATORY PROTEIN FIXJ	A, B	126	Sinorhizobium meliloti	Mutation(s): 2
UniProt
Find proteins for P10958 (Rhizobium meliloti (strain 1021)) Explore P10958  Go to UniProtKB:  P10958

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
15P	C [auth A]	POLYETHYLENE GLYCOL (N=34) C69 H140 O35 VUYXVWGKCKTUMF-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.224 
• R-Value Work: 0.187 
• R-Value Observed: 0.187 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 31.7	α = 93.2
b = 42.2	β = 104.5
c = 44.6	γ = 101.9

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-11-26 
Deposition Author(s): Gouet, P., Fabry, B., Guillet, V., Birck, C., Mourey, L., Kahn, D., Samama, J.P.

Revision History  

• Version 1.0: 1999-11-26
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-01-31
  Changes: Experimental preparation
• Version 1.4: 2021-11-03
  Changes: Database references, Derived calculations
• Version 1.5: 2024-02-07
  Changes: Data collection