Biological Assembly 1  

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

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 17.76 kDa 
• Atom Count: 1285 
• Modelled Residue Count: 163 
• Deposited Residue Count: 163 
• Unique protein chains: 1

1FUE

FLAVODOXIN FROM HELICOBACTER PYLORI

• PDB DOI: 10.2210/pdb1FUE/pdb

• Classification: ELECTRON TRANSPORT
• Organism(s): Helicobacter pylori
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2000-09-15 Released: 2002-02-06 
• Deposition Author(s): Freigang, J., Diederichs, K., Schaefer, K.P., Welte, W., Paul, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.270 
• R-Value Work: 0.198 
• R-Value Observed: 0.198 

Literature

Crystal structure of oxidized flavodoxin, an essential protein in Helicobacter pylori.

Freigang, J., Diederichs, K., Schafer, K.P., Welte, W., Paul, R.

(2002) Protein Sci 11: 253-261

• PubMed: 11790835 
• DOI: 10.1110/ps.28602
• Primary Citation of Related Structures:  
  1FUE


• PubMed Abstract: 
  

The redox protein flavodoxin has been shown earlier to be reduced by the pyruvate-oxidoreductase (POR) enzyme complex of Helicobacter pylori, and also was proposed to be involved in the pathogenesis of gastric mucosa-associated lymphoid-tissue lymphoma (MALToma). Here, we report its X-ray structure, which is similar to flavodoxins of other bacteria and cyanobacteria. However, H. pylori flavodoxin has an alanine residue near the isoalloxazine ring of its cofactor flavin mononucleotide (FMN), while the other previously crystallized flavodoxins have a larger hydrophobic residue at this position. This creates a solute filled hole near the FMN cofactor of H. pylori flavodoxin. We also show that flavodoxin is essential for the survival of H. pylori, and conclude that its structure can be used as a starting point for the modeling of an inhibitor for the interaction between the POR-enzyme complex and flavodoxin.

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Organizational Affiliation: 

Fachbereich Biologie, Universität Konstanz, D-78457 Konstanz, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
FLAVODOXIN	A	163	Helicobacter pylori	Mutation(s): 0
UniProt
Find proteins for Q9ZK53 (Helicobacter pylori (strain J99 / ATCC 700824)) Explore Q9ZK53  Go to UniProtKB:  Q9ZK53

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FMN	B [auth A]	FLAVIN MONONUCLEOTIDE C17 H21 N4 O9 P FVTCRASFADXXNN-SCRDCRAPSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.270 
• R-Value Work: 0.198 
• R-Value Observed: 0.198 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 31.13	α = 90
b = 47.22	β = 97.14
c = 48.31	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-09-15 
• Released Date: 2002-02-06 
Deposition Author(s): Freigang, J., Diederichs, K., Schaefer, K.P., Welte, W., Paul, R.

Revision History  

• Version 1.0: 2002-02-06
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-04-04
  Changes: Data collection