3FXQ

Crystal structure of the LysR-type transcriptional regulator TsaR


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural studies on the full-length LysR-type regulator TsaR from Comamonas testosteroni T-2 reveal a novel open conformation of the tetrameric LTTR fold

Monferrer, D.Tralau, T.Kertesz, M.A.Dix, I.Sola, M.Uson, I.

(2010) Mol Microbiol 75: 1199-1214

  • DOI: 10.1111/j.1365-2958.2010.07043.x
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • LysR-type transcriptional regulators (LTTRs) constitute the largest family of regulators in prokaryotes. The full-length structures of the LTTR TsaR from Comamonas testosteroni T-2 and its complex with the natural inducer para-toluensulfonate have be ...

    LysR-type transcriptional regulators (LTTRs) constitute the largest family of regulators in prokaryotes. The full-length structures of the LTTR TsaR from Comamonas testosteroni T-2 and its complex with the natural inducer para-toluensulfonate have been characterized by X-ray diffraction. Both ligand-free and complexed forms reveal a dramatically different quaternary structure from that of CbnR from Ralstonia eutropha, or a putative LysR-type regulator from Pseudomonas aeruginosa, the only other determined full-length structures of tetrameric LTTRs. Although all three show a head-to-head tetrameric ring, TsaR displays an open conformation, whereas CbnR and PA01-PR present additional contacts in opposing C-terminal domains that close the ring. Such large differences may be due to a broader structural versatility than previously assumed or either, reflect the intrinsic flexibility of tetrameric LTTRs. On the grounds of the sliding dimer hypothesis of LTTR activation, we propose a structural model in which the closed structures could reflect the conformation of a ligand-free LTTR, whereas inducer binding would bring about local changes to disrupt the interface linking the two compact C-terminal domains. This could lead to a TsaR-like, open structure, where the pairs of recognition helices are closer to each other by more than 10 A.


    Related Citations: 
    • High crystallizability under air-exclusion conditions of the full-length LysR-type transcriptional regulator TsaR from Comamonas testosteroni T-2 and data-set analysis for a MIRAS structure-solution approach
      Monferrer, D., Tralau, T., Kertesz, M.A., Panjikar, S., Uson, I.
      (2008) Acta Crystallogr Sect F Struct Biol Cryst Commun 64: 764

    Organizational Affiliation

    IBMB-CSIC, Baldiri Reixach 15, Barcelona Science Park, 08028, Barcelona, Spain.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LysR type regulator of tsaMBCDA, B305Comamonas testosteroniMutation(s): 0 
Gene Names: tsaR
Find proteins for P94678 (Comamonas testosteroni)
Explore P94678 
Go to UniProtKB:  P94678
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
BME
Query on BME

Download CCD File 
A, B
BETA-MERCAPTOETHANOL
C2 H6 O S
DGVVWUTYPXICAM-UHFFFAOYSA-N
 Ligand Interaction
FMT
Query on FMT

Download CCD File 
A
FORMIC ACID
C H2 O2
BDAGIHXWWSANSR-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.213 
  • R-Value Work: 0.180 
  • R-Value Observed: 0.182 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 136.496α = 90
b = 51.489β = 110.35
c = 107.754γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
PROTEUM PLUSdata collection
XDSdata reduction
PROTEUMdata reduction
XSCALEdata scaling
SADABSdata scaling
SHARPphasing
RESOLVEphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-01-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description