1F48

CRYSTAL STRUCTURE OF THE ESCHERICHIA COLI ARSENITE-TRANSLOCATING ATPASE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of the ArsA ATPase: the catalytic subunit of a heavy metal resistance pump.

Zhou, T.Radaev, S.Rosen, B.P.Gatti, D.L.

(2000) EMBO J. 19: 4838-4845

  • DOI: 10.1093/emboj/19.17.4838

  • PubMed Abstract: 
  • Active extrusion is a common mechanism underlying detoxification of heavy metals, drugs and antibiotics in bacteria, protozoa and mammals. In Escherichia coli, the ArsAB pump provides resistance to arsenite and antimonite. This pump consists of a sol ...

    Active extrusion is a common mechanism underlying detoxification of heavy metals, drugs and antibiotics in bacteria, protozoa and mammals. In Escherichia coli, the ArsAB pump provides resistance to arsenite and antimonite. This pump consists of a soluble ATPase (ArsA) and a membrane channel (ArsB). ArsA contains two nucleotide-binding sites (NBSs) and a binding site for arsenic or antimony. Binding of metalloids stimulates ATPase activity. The crystal structure of ArsA reveals that both NBSs and the metal-binding site are located at the interface between two homologous domains. A short stretch of residues connecting the metal-binding site to the NBSs provides a signal transduction pathway that conveys information on metal occupancy to the ATP hydrolysis sites. Based on these structural features, we propose that the metal-binding site is involved directly in the process of vectorial translocation of arsenite or antimonite across the membrane. The relative positions of the NBS and the inferred mechanism of allosteric activation of ArsA provide a useful model for the interaction of the catalytic domains in other transport ATPases.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ARSENITE-TRANSLOCATING ATPASE
A
589Escherichia coliMutation(s): 0 
Gene Names: arsA
EC: 3.6.3.16
Find proteins for P08690 (Escherichia coli)
Go to UniProtKB:  P08690
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SB
Query on SB

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A
ANTIMONY (III) ION
Sb
FAWGZAFXDJGWBB-UHFFFAOYSA-N
 Ligand Interaction
SBO
Query on SBO

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A
TRIHYDROXYANTIMONITE(III)
H3 O3 Sb
SZOADBKOANDULT-UHFFFAOYSA-K
 Ligand Interaction
ADP
Query on ADP

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Download CCD File 
A
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
CL
Query on CL

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A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

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A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
CD
Query on CD

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A
CADMIUM ION
Cd
WLZRMCYVCSSEQC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.3 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.206 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 73.523α = 90.00
b = 75.715β = 90.00
c = 222.714γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-09-13
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-04
    Type: Refinement description