5NXY

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.193 

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:  

  • 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 tran ...

    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

    Laboratory for Microbiology, Department of Biology, Philipps-University Marburg, Karl-von-Frisch Str. 8, Marburg D-35043, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Osmotically activated L-carnitine/choline ABC transporter substrate-binding protein OpuCC
A, C
284Bacillus subtilis (strain 168)Mutation(s): 0 
Gene Names: opuBC (proX)
Find proteins for Q45462 (Bacillus subtilis (strain 168))
Go to UniProtKB:  Q45462
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1Y8
Query on 1Y8

Download SDF File 
Download CCD File 
A, C
2-(trimethyl-lambda~5~-arsanyl)ethanol
C5 H14 As O
CIHXLIBMYUSRLN-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.193 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 38.200α = 90.00
b = 117.400β = 104.00
c = 68.700γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
XDSdata reduction
XSCALEdata scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-03-14
    Type: Initial release