4LDZ

Crystal structure of the full-length response regulator DesR in the active state

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Allosteric activation of bacterial response regulators: the role of the cognate histidine kinase beyond phosphorylation.

Trajtenberg, F., Albanesi, D., Ruetalo, N., Botti, H., Mechaly, A.E., Nieves, M., Aguilar, P.S., Cybulski, L., Larrieux, N., de Mendoza, D., Buschiazzo, A.

(2014) mBio 5: e02105-e02105

  • DOI: 10.1128/mBio.02105-14
  • Primary Citation of Related Structures:  
    4LDZ, 4LE0, 4LE1, 4LE2

  • PubMed Abstract: 

    • Response regulators are proteins that undergo transient phosphorylation, connecting specific signals to adaptive responses. Remarkably, the molecular mechanism of response regulator activation remains elusive, largely because of the scarcity of structural data on multidomain response regulators and histidine kinase/response regulator complexes ...

    Response regulators are proteins that undergo transient phosphorylation, connecting specific signals to adaptive responses. Remarkably, the molecular mechanism of response regulator activation remains elusive, largely because of the scarcity of structural data on multidomain response regulators and histidine kinase/response regulator complexes. We now address this question by using a combination of crystallographic data and functional analyses in vitro and in vivo, studying DesR and its cognate sensor kinase DesK, a two-component system that controls membrane fluidity in Bacillus subtilis. We establish that phosphorylation of the receiver domain of DesR is allosterically coupled to two distinct exposed surfaces of the protein, controlling noncanonical dimerization/tetramerization, cooperative activation, and DesK binding. One of these surfaces is critical for both homodimerization- and kinase-triggered allosteric activations. Moreover, DesK induces a phosphorylation-independent activation of DesR in vivo, uncovering a novel and stringent level of specificity among kinases and regulators. Our results support a model that helps to explain how response regulators restrict phosphorylation by small-molecule phosphoryl donors, as well as cross talk with noncognate sensors.

    Organizational Affiliation: 

    alebus@pasteur.edu.uy.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transcriptional regulatory protein DesRA, B203Bacillus subtilis subsp. subtilis str. 168Mutation(s): 0 
Gene Names: desR, yocG, BSU19200
UniProt
Find proteins for O34723 (Bacillus subtilis (strain 168))
Explore O34723 
Go to UniProtKB:  O34723
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO34723
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.31 Å
  • R-Value Free: 0.221 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.612α = 90
b = 77.646β = 90
c = 139.751γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction
MAR345dtbdata collection
XDSdata reduction
BUSTERrefinement

Structure Validation

View Full Validation Report



View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-07-16
    Type: Initial release
  • Version 1.1: 2015-05-06
    Changes: Database references