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 

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
  • Primary Citation of Related Structures:  

  • 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 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 tsaMBCD
A, B
305Comamonas testosteroniMutation(s): 0 
Gene Names: tsaR
Find proteins for P94678 (Comamonas testosteroni)
Go to UniProtKB:  P94678
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMT
Query on FMT

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

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Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
BME
Query on BME

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Download CCD File 
A, B
BETA-MERCAPTOETHANOL
C2 H6 O S
DGVVWUTYPXICAM-UHFFFAOYSA-N
 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 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 136.496α = 90.00
b = 51.489β = 110.35
c = 107.754γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
XSCALEdata scaling
XDSdata reduction
SADABSdata scaling
SHARPphasing
RESOLVEphasing
PROTEUM PLUSdata collection
REFMACrefinement
PROTEUMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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