Biological Assembly 1  

 3D View: Structure

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 12358.09 
• Atom Count: 861 
• Residue Count: 106 
• Unique protein chains: 1

1GXQ

Crystal structure of the PhoB effector domain

• DOI: 10.2210/pdb1GXQ/pdb

• Classification: TRANSCRIPTIONAL ACTIVATOR
• Organism(s): Escherichia coli (strain K12)
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2002-04-08 Released: 2002-04-29 
• Deposition Author(s): Blanco, A.G., Sola, M., Gomis-Ruth, F.X., Coll, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.266 
• R-Value Work: 0.200 

Literature

Tandem DNA Recognition by Two-Component Signal Transduction Transcriptional Activator Phob

Blanco, A.G., Sola, M., Gomis-Ruth, F.X., Coll, M.

(2002) Structure 10: 701

• PubMed: 12015152 
• Primary Citation of Related Structures:  
  1GXP


• PubMed Abstract: 
  

PhoB is a signal transduction response regulator that activates nearly 40 genes in phosphate depletion conditions in E. coli and closely related bacteria. The structure of the PhoB effector domain in complex with its target DNA sequence, or pho box, reveals a novel tandem arrangement in which several monomers bind head to tail to successive 11-base pair direct-repeat sequences, coating one face of a smoothly bent double helix. The protein has a winged helix fold in which the DNA recognition elements comprise helix alpha 3, penetrating the major groove, and a beta hairpin wing interacting with a compressed minor groove via Arg219, tightly sandwiched between the DNA sugar backbones. The transactivation loops protrude laterally in an appropriate orientation to interact with the RNA polymerase sigma(70) subunit, which triggers transcription initiation.

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Organizational Affiliation: 

Institut de Biologia Molecular de Barcelona, CSIC, Jordi Girona, 18-26, E-08034 Barcelona, Spain.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
PHOSPHATE REGULON TRANSCRIPTIONAL REGULATORY PROTEIN PHOB	A	106	Escherichia coli (strain K12)	Mutation(s): 0  Gene Names: phoB
Find proteins for P0AFJ5 (Escherichia coli (strain K12)) Go to UniProtKB:  P0AFJ5

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2 Å
• R-Value Free: 0.266 
• R-Value Work: 0.200 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 84.650	α = 90.00
b = 37.290	β = 90.00
c = 30.510	γ = 90.00

Software Package:

Software Name	Purpose
SCALEPACK	data scaling
CNS	refinement
MOSFLM	data reduction
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-04-08 
• Released Date: 2002-04-29 
• Deposition Author(s): Blanco, A.G., Sola, M., Gomis-Ruth, F.X., Coll, M.

Revision History 

• Version 1.0: 2002-04-29
  Type: Initial release
• Version 1.1: 2015-02-25
  Type: Database references, Derived calculations, Non-polymer description, Other, Refinement description, Source and taxonomy, Structure summary, Version format compliance