Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 13.14 kDa 
• Atom Count: 724 
• Modelled Residue Count: 86 
• Deposited Residue Count: 110 
• Unique protein chains: 1

1X93

NMR Structure of Helicobacter pylori HP0222

• PDB DOI: 10.2210/pdb1X93/pdb

• Classification: TRANSCRIPTION
• Organism(s): Helicobacter pylori 26695
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2004-08-19 Released: 2005-03-22 
• Deposition Author(s): Popescu, A., Karpay, A., Israel, D., Peek Jr., R.M., Krezel, A.M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 80 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Helicobacter pylori protein HP0222 belongs to Arc/MetJ family of transcriptional regulators.

Popescu, A., Karpay, A., Israel, D.A., Peek Jr., R.M., Krezel, A.M.

(2005) Proteins 59: 303-311

• PubMed: 15723352 
• DOI: 10.1002/prot.20406
• Primary Citation of Related Structures:  
  1X93


• PubMed Abstract: 
  

Helicobacter pylori is a widespread human bacterial pathogen responsible for inducing gastric and duodenal ulcers and gastric cancers. To date, only 16 protein structures from this organism have been determined, and more than 30% of its 1500 protein functions remain unknown. We report the biochemical characterization, the tertiary structure determined by solution nuclear magnetic resonance (NMR) methods and the putative function of the previously uncharacterized protein HP0222 (JHP0208) from H. pylori. Recombinant HP0222 behaves as a dimer in crosslinking and size exclusion chromatography experiments. The structure consists of a ribbon-helix-helix fold characteristic of transcription factors of the Arc/MetJ family, which all bind DNA as higher order oligomers. Electrophoretic mobility shift assays reveal that HP0222 binds to double-stranded DNA. Previous studies have shown significant increases in transcription levels of HP0222 in response to acid shock and adherence to gastric epithelial cells. To assess possible involvement of HP0222 in acid resistance, we constructed and assayed an H. pylori HP0222 null mutant. We propose that HP0222 is a novel transcriptional regulator in H. pylori.

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Organizational Affiliation: 

Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee 37232, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
hypothetical protein HP0222	A, B	55	Helicobacter pylori 26695	Mutation(s): 0  Gene Names: HP0222, HP_0222
UniProt
Find proteins for O25010 (Helicobacter pylori (strain ATCC 700392 / 26695)) Explore O25010  Go to UniProtKB:  O25010

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 80 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 1X93 Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-08-19 
• Released Date: 2005-03-22 
Deposition Author(s): Popescu, A., Karpay, A., Israel, D., Peek Jr., R.M., Krezel, A.M.

Revision History  

• Version 1.0: 2005-03-22
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Source and taxonomy, Version format compliance