1QMP

Phosphorylated aspartate in the crystal structure of the sporulation response regulator, Spo0A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.200 

Starting Model: experimental
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This is version 1.7 of the entry. See complete history


Literature

Phosphorylated aspartate in the structure of a response regulator protein.

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

(1999) J Mol Biol 294: 9-15

  • DOI: https://doi.org/10.1006/jmbi.1999.3261
  • Primary Citation of Related Structures:  
    1QMP

  • PubMed Abstract: 

    Phosphorylation of aspartic acid residues is the hallmark of two- component signal transduction systems that orchestrate the adaptive responses of micro-organisms to changes in their surroundings. Two-component systems consist of a sensor kinase that interprets environmental signals and a response regulator that activates the appropriate physiological response. Although structures of response regulators are known, little is understood about their activated phosphorylated forms, due to the intrinsic instability of the acid phosphate linkage. Here, we report the phosphorylated structure of the receiver/phosphoacceptor domain of Spo0A, the master regulator of sporulation, from Bacillus stearothermophilus. The phosphoryl group is covalently bonded to the invariant aspartate 55, and co-ordinated to a nearby divalent metal cation, with both species fulfilling their electrostatic potential through interactions with solvent water molecules, the protein main chain, and with side-chains of amino acid residues strongly conserved across the response regulator family. This is the first direct visualisation of a phosphoryl group covalently linked to an aspartic acid residue in any protein, with implications for signalling within the response regulator family.


  • Organizational Affiliation

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


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Stage 0 sporulation protein A
A, B, C, D
130Geobacillus stearothermophilusMutation(s): 0 
Gene Names: spo0A
UniProt
Find proteins for P52934 (Geobacillus stearothermophilus)
Explore P52934 
Go to UniProtKB:  P52934
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP52934
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.200 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 69.197α = 90
b = 72.859β = 90
c = 114.297γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1999-11-14
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-07-12
    Changes: Derived calculations
  • Version 1.4: 2018-06-06
    Changes: Data collection, Database references, Derived calculations, Source and taxonomy, Structure summary
  • Version 1.5: 2019-07-10
    Changes: Data collection
  • Version 1.6: 2019-07-24
    Changes: Data collection
  • Version 1.7: 2024-05-01
    Changes: Advisory, Data collection, Database references, Derived calculations, Other, Refinement description