1QO0

Amide receptor of the amidase operon of Pseudomonas aeruginosa (AmiC) complexed with the negative regulator AmiR.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal Structure and Induction Mechanism of Amic-Amir: A Ligand-Regulated Transcription Antitermination Complex

O'Hara, B.P.Norman, R.A.Wan, P.T.C.Roe, S.M.Barrett, T.E.Drew, R.E.Pearl, L.H.

(1999) Embo J. 18: 5175

  • DOI: 10.1093/emboj/18.19.5175

  • PubMed Abstract: 
  • Inducible expression of the aliphatic amidase operon in Pseudomonas aeruginosa is controlled by an antitermination mechanism which allows production of the full-length transcript only in the presence of small-molecule inducers, such as acetamide. Lig ...

    Inducible expression of the aliphatic amidase operon in Pseudomonas aeruginosa is controlled by an antitermination mechanism which allows production of the full-length transcript only in the presence of small-molecule inducers, such as acetamide. Ligand-regulated antitermination is provided by AmiC, the ligand-sensitive negative regulator, and AmiR, the RNA-binding positive regulator. Under non-inducing or repressing growth conditions, AmiC and AmiR form a complex in which the activity of AmiR is silenced. The crystal structure of the AmiC-AmiR complex identifies AmiR as a new and highly unusual member of the response-regulator family of bacterial signal transduction proteins, regulated by sequestration rather than phosphorylation. Comparison with the structure of free AmiC reveals the subtle mechanism of ligand-induced release of AmiR.


    Related Citations: 
    • Antitermination of Amidase Expression in Pseudomonas Aeruginosa is Controlled by a Novel Cytoplasmic Amide- Binding Protein
      Wilson, S.A.,Wachira, S.J.,Drew, R.E.,Jones, D.,Pearl, L.H.
      (1993) Embo J. 12: 3637
    • Crystal Structure of Amic: The Controller of Transcription Antitermination in the Amidase Operon of Pseudomonas Aeruginosa
      Pearl, L.H.,O'Hara, B.P.,Drew, R.E.,Wilson, S.W.
      (1994) Embo J. 13: 5810
    • Crystallization and Preliminary X-Ray Data for the Negative Regulator (Amic) of the Amidase Operon of Pseudomonas Aeruginosa
      Wilson, S.A.,Chayen, N.E.,Hemmings, A.M.,Drew, R.E.,Pearl, L.H.
      (1991) J.Mol.Biol. 222: 869


    Organizational Affiliation

    Centre for Structural Biology, Institute of Cancer Research, Chester Beatty Laboratories, 237 Fulham Road, London SW3 6JB, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AMIC
A, B
385Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)Mutation(s): 0 
Gene Names: amiC
Find proteins for P27017 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  P27017
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
AMIR
D, E
196Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1)Mutation(s): 0 
Gene Names: amiR
Find proteins for P10932 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Go to UniProtKB:  P10932
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BMD
Query on BMD

Download SDF File 
Download CCD File 
A, B
BUTYRAMIDE
C4 H9 N O
DNSISZSEWVHGLH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.186 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 308.440α = 90.00
b = 67.150β = 103.33
c = 76.410γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
AMoREphasing
MOSFLMdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-12-23
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2019-05-08
    Type: Data collection, Experimental preparation, Other