2Q62

Crystal Structure of ArsH from Sinorhizobium meliloti

• PDB DOI: https://doi.org/10.2210/pdb2Q62/pdb

• Classification: FLAVOPROTEIN
• Organism(s): Sinorhizobium meliloti
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2007-06-04 Released: 2007-12-11 
• Deposition Author(s): Ye, J., Yang, H., Bhattacharjee, H., Rosen, B.P.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.212 
• R-Value Work: 0.173 
• R-Value Observed: 0.175 

Literature

Crystal structure of the flavoprotein ArsH from Sinorhizobium meliloti

Ye, J., Yang, H., Rosen, B.P., Bhattacharjee, H.

(2007) FEBS Lett 581: 3996-4000

• PubMed: 17673204 
• DOI: https://doi.org/10.1016/j.febslet.2007.07.039
• Primary Citation of Related Structures:  
  2Q62


• PubMed Abstract: 
  

  Purified ArsH from Sinorhizobium meliloti exhibits NADPH:FMN-dependent reduction of molecular O2 to hydrogen peroxide and catalyzes reduction of azo dyes. The structure of ArsH was determined at 1.8A resolution. ArsH crystallizes with eight molecules in the asymmetric unit forming two tetramers. Each monomer has a core domain with a central five-stranded parallel beta-sheet and two monomers interact to form a classical flavodoxin-like dimer. The N- and C-terminal extensions of ArsH are involved in interactions between subunits and tetramer formation. The structure may provide insight in how ArsH participates in arsenic detoxification.

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Organizational Affiliation: 

Department of Biochemistry and Molecular Biology, Wayne State University, School of Medicine, 540 East Canfield Avenue, Detroit, MI 48201, USA.

Biological Assembly 1  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

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

Biological Assembly 2  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 2 assigned by authors and generated by PISA,PQS (software)

Macromolecule Content

• Total Structure Weight: 224.24 kDa 
• Atom Count: 15,789 
• Modelled Residue Count: 1,778 
• Deposited Residue Count: 1,976 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
arsH	A, B, C, D, E, F, G, H	247	Sinorhizobium meliloti	Mutation(s): 0  Gene Names: arsH EC: 1
UniProt
Find proteins for Q92R45 (Rhizobium meliloti (strain 1021)) Explore Q92R45  Go to UniProtKB:  Q92R45

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	I [auth A], J [auth B], K [auth C], L [auth D], M [auth F], N [auth G], O [auth H]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.212 
• R-Value Work: 0.173 
• R-Value Observed: 0.175 
• Space Group: P 4₂

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 158.534	α = 90
b = 158.534	β = 90
c = 87.953	γ = 90

Software Package:

Software Name	Purpose
SCALA	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
MOSFLM	data reduction
SnB	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-12-11 
Deposition Author(s): Ye, J., Yang, H., Bhattacharjee, H., Rosen, B.P.

Revision History  

• Version 1.0: 2007-12-11
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Derived calculations, Version format compliance
• Version 1.2: 2024-02-21
  Changes: Data collection, Database references, Derived calculations