3BCG

Conformational changes of the AcrR regulator reveal a mechanism of induction

• PDB DOI: https://doi.org/10.2210/pdb3BCG/pdb

• Classification: TRANSCRIPTION regulator
• Organism(s): Escherichia coli K-12
• Expression System: Escherichia coli K-12
• Mutation(s): No 


• Deposited: 2007-11-12 Released: 2008-02-26 
• Deposition Author(s): Gu, R., Li, M., Su, C.C., Long, F., Yang, F., McDermott, G., Yu, E.Y.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.48 Å
• R-Value Free: 0.268 
• R-Value Work: 0.214 

Literature

Conformational change of the AcrR regulator reveals a possible mechanism of induction.

Gu, R., Li, M., Su, C.C., Long, F., Routh, M.D., Yang, F., McDermott, G., Yu, E.W.

(2008) Acta Crystallogr Sect F Struct Biol Cryst Commun 64: 584-588

• PubMed: 18607081 
• DOI: https://doi.org/10.1107/S1744309108016035
• Primary Citation of Related Structures:  
  3BCG


• PubMed Abstract: 
  

  The Escherichia coli AcrR multidrug-binding protein represses transcription of acrAB and is induced by many structurally unrelated cytotoxic compounds. The crystal structure of AcrR in space group P222(1) has been reported previously. This P222(1) structure has provided direct information about the multidrug-binding site and important residues for drug recognition. Here, a crystal structure of this regulator in space group P3(1) is presented. Comparison of the two AcrR structures reveals possible mechanisms of ligand binding and AcrR regulation.

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Organizational Affiliation: 

Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 49.6 kDa 
• Atom Count: 3,428 
• Modelled Residue Count: 414 
• Deposited Residue Count: 430 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HTH-type transcriptional regulator acrR	A, B	215	Escherichia coli K-12	Mutation(s): 0  Gene Names: acrR
UniProt
Find proteins for P0ACS9 (Escherichia coli (strain K12)) Explore P0ACS9  Go to UniProtKB:  P0ACS9

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.48 Å
• R-Value Free: 0.268 
• R-Value Work: 0.214 
• Space Group: P 3₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 46.66	α = 90
b = 46.66	β = 90
c = 166.155	γ = 120

Software Package:

Software Name	Purpose
HKL-2000	data collection
SnB	phasing
CNS	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-02-26 
Deposition Author(s): Gu, R., Li, M., Su, C.C., Long, F., Yang, F., McDermott, G., Yu, E.Y.

Revision History  

• Version 1.0: 2008-02-26
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2024-02-21
  Changes: Data collection, Database references