5NXX

Crystal structure of OpuAC from B. subtilis in complex with Arsenobetaine


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.189 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Arsenobetaine: an ecophysiologically important organoarsenical confers cytoprotection against osmotic stress and growth temperature extremes.

Hoffmann, T.Warmbold, B.Smits, S.H.J.Tschapek, B.Ronzheimer, S.Bashir, A.Chen, C.Rolbetzki, A.Pittelkow, M.Jebbar, M.Seubert, A.Schmitt, L.Bremer, E.

(2018) Environ Microbiol 20: 305-323

  • DOI: 10.1111/1462-2920.13999
  • Primary Citation of Related Structures:  
    5NXX, 5NXY

  • PubMed Abstract: 
  • Arsenic, a highly cytotoxic and cancerogenic metalloid, is brought into the biosphere through geochemical sources and anthropogenic activities. A global biogeochemical arsenic biotransformation cycle exists in which inorganic arsenic species are transformed into organoarsenicals, which are subsequently mineralized again into inorganic arsenic compounds ...

    Arsenic, a highly cytotoxic and cancerogenic metalloid, is brought into the biosphere through geochemical sources and anthropogenic activities. A global biogeochemical arsenic biotransformation cycle exists in which inorganic arsenic species are transformed into organoarsenicals, which are subsequently mineralized again into inorganic arsenic compounds. Microorganisms contribute to this biotransformation process greatly and one of the organoarsenicals synthesized and degraded in this cycle is arsenobetaine. Its nitrogen-containing homologue glycine betaine is probably the most frequently used compatible solute on Earth. Arsenobetaine is found in marine and terrestrial habitats and even in deep-sea hydrothermal vent ecosystems. Despite its ubiquitous occurrence, the biological function of arsenobetaine has not been comprehensively addressed. Using Bacillus subtilis as a well-understood platform for the study of microbial osmostress adjustment systems, we ascribe here to arsenobetaine both a protective function against high osmolarity and a cytoprotective role against extremes in low and high growth temperatures. We define a biosynthetic route for arsenobetaine from the precursor arsenocholine that relies on enzymes and genetic regulatory circuits for glycine betaine formation from choline, identify the uptake systems for arsenobetaine and arsenocholine, and describe crystal structures of ligand-binding proteins from the OpuA and OpuB ABC transporters complexed with either arsenobetaine or arsenocholine.


    Organizational Affiliation

    LOEWE-Center for Synthetic Microbiology, Philipps-University Marburg, Hans-Meerwein Str. 6, Marburg D-35043, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glycine betaine ABC transport system glycine betaine-binding protein OpuACA [auth C],
B [auth D]
268Bacillus subtilisMutation(s): 0 
Gene Names: B4417_1321SAMN05878487_3340
UniProt
Find proteins for P46922 (Bacillus subtilis (strain 168))
Explore P46922 
Go to UniProtKB:  P46922
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP46922
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
3Q7
Query on 3Q7

Download Ideal Coordinates CCD File 
C, D (trimethylarsonio)acetate
C5 H11 As O2
SPTHHTGLGVZZRH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.189 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.1α = 90
b = 30β = 95.6
c = 106.1γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHENIXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-03-28
    Type: Initial release