2D1G

Structure of Francisella tularensis Acid Phosphatase A (AcpA) bound to orthovanadate


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.198 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of Francisella tularensis AcpA: prototype of a unique superfamily of acid phosphatases and phospholipases C

Felts, R.L.Reilly, T.J.Tanner, J.J.

(2006) J Biol Chem 281: 30289-30298

  • DOI: 10.1074/jbc.M606391200
  • Primary Citation of Related Structures:  
    2D1G

  • PubMed Abstract: 
  • AcpA is a respiratory burst-inhibiting acid phosphatase from the Centers for Disease Control and Prevention Category A bioterrorism agent Francisella tularensis and prototype of a superfamily of acid phosphatases and phospholipases C. We report the 1.75-A resolution crystal structure of AcpA complexed with the inhibitor orthovanadate, which is the first structure of any F ...

    AcpA is a respiratory burst-inhibiting acid phosphatase from the Centers for Disease Control and Prevention Category A bioterrorism agent Francisella tularensis and prototype of a superfamily of acid phosphatases and phospholipases C. We report the 1.75-A resolution crystal structure of AcpA complexed with the inhibitor orthovanadate, which is the first structure of any F. tularensis protein and the first for any member of this superfamily. The core domain is a twisted 8-stranded beta-sheet flanked by three alpha-helices on either side, with the active site located above the carboxyl-terminal edge of the beta-sheet. This architecture is unique among acid phosphatases and resembles that of alkaline phosphatase. Unexpectedly, the active site features a serine nucleophile and metal ion with octahedral coordination. Structure-based sequence analysis of the AcpA superfamily predicts that the hydroxyl nucleophile and metal center are also present in AcpA-like phospholipases C. These results imply a phospholipase C catalytic mechanism that is radically different from that of zinc metallophospholipases.


    Organizational Affiliation

    Department of Chemistry, University of Missouri, Columbia, Missouri 65211, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
acid phosphatase AB498Francisella tularensis subsp. novicidaMutation(s): 0 
Gene Names: acpA
EC: 3.1.3.2
Find proteins for A0Q436 (Francisella tularensis subsp. novicida (strain U112))
Explore A0Q436 
Go to UniProtKB:  A0Q436
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DVT
Query on DVT

Download Ideal Coordinates CCD File 
B
DECAVANADATE
O28 V10
WOYKCMUEHQAMTC-UHFFFAOYSA-N
 Ligand Interaction
ETE
Query on ETE

Download Ideal Coordinates CCD File 
A
2-{2-[2-2-(METHOXY-ETHOXY)-ETHOXY]-ETHOXY}-ETHANOL
C9 H20 O5
ZNYRFEPBTVGZDN-UHFFFAOYSA-N
 Ligand Interaction
PGE
Query on PGE

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B
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
VO4
Query on VO4

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A, B
VANADATE ION
O4 V
LSGOVYNHVSXFFJ-UHFFFAOYSA-N
 Ligand Interaction
ETX
Query on ETX

Download Ideal Coordinates CCD File 
A
2-ETHOXYETHANOL
C4 H10 O2
ZNQVEEAIQZEUHB-UHFFFAOYSA-N
 Ligand Interaction
UNX
Query on UNX

Download Ideal Coordinates CCD File 
A, B
UNKNOWN ATOM OR ION
X
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.75 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.198 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 112.081α = 90
b = 144.399β = 90
c = 123.859γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SHARPphasing
CNSrefinement
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-08-15
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description