1OJL

Crystal structure of a sigma54-activator suggests the mechanism for the conformational switch necessary for sigma54 binding


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.252 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structure of the Central and C-Terminal Domain of the Sigma(54)-Activator Zrar.

Sallai, L.Tucker, P.A.

(2005) J.Struct.Biol. 151: 160

  • DOI: 10.1016/j.jsb.2005.05.006

  • PubMed Abstract: 
  • The sigma(54)-dependent transcription in bacteria is associated with various stress and growth conditions. Activators of the sigma(54) protein contain a central domain belonging to the AAA+ superfamily of ATPases, members of which function in diverse ...

    The sigma(54)-dependent transcription in bacteria is associated with various stress and growth conditions. Activators of the sigma(54) protein contain a central domain belonging to the AAA+ superfamily of ATPases, members of which function in diverse cellular processes in both prokaryotic and eukaryotic cells. We describe the X-ray structure of an N-terminal domain deletion of the ZraR protein from Salmonella typhimurium, which is a homologue of the general nitrogen regulatory protein NtrC, at 3A resolution. The structure reveals a hexameric ring that is typical for AAA+ containing proteins but which differs from the heptameric ring found in the crystal structure of the AAA+ domain of NtrC1 from Aquifex aeolicus. The dimerisation interface between DNA-binding domains observed in the crystal structure suggests that dodecamers, rather than hexamers, might be the functionally important oligomer.


    Organizational Affiliation

    European Molecular Biology Laboratory Hamburg Outstation, c/o DESY, Notkestrasse 85, D-22603 Hamburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRANSCRIPTIONAL REGULATORY PROTEIN ZRAR
A, B, C, D, E, F
304Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)Gene Names: zraR (hydG)
Find proteins for P25852 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Go to UniProtKB:  P25852
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download SDF File 
Download CCD File 
E
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, B, C, D, F
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.252 
  • Space Group: P 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 107.440α = 90.00
b = 114.740β = 90.00
c = 187.260γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
SCALEPACKdata scaling
REFMACrefinement
DENZOdata reduction
SHELXDphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-05-19
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance