3QUN

Crystal structure of fosfomycin resistance kinase FomA from Streptomyces wedmorensis complexed with MgATP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural and biochemical insights into the mechanism of fosfomycin phosphorylation by fosfomycin resistance kinase FomA.

Pakhomova, S.Bartlett, S.G.Doerner, P.A.Newcomer, M.E.

(2011) Biochemistry 50: 6909-6919

  • DOI: 10.1021/bi2004334
  • Primary Citation of Related Structures:  
    3QUO, 3QUR, 3QUN, 3QVH, 3QVF

  • PubMed Abstract: 
  • We present here the crystal structures of fosfomycin resistance protein (FomA) complexed with MgATP, with ATP and fosfomycin, with MgADP and fosfomycin vanadate, with MgADP and the product of the enzymatic reaction, fosfomycin monophosphate, and with ...

    We present here the crystal structures of fosfomycin resistance protein (FomA) complexed with MgATP, with ATP and fosfomycin, with MgADP and fosfomycin vanadate, with MgADP and the product of the enzymatic reaction, fosfomycin monophosphate, and with ADP at 1.87, 1.58, 1.85, 1.57, and 1.85 Å resolution, respectively. Structures of these complexes that approximate different reaction steps allowed us to distinguish the catalytically active conformation of ATP and to reconstruct the model of the MgATP·fosfomycin complex. According to the model, the triphosphate tail of the nucleotide is aligned toward the phosphonate moiety of fosfomycin, in contest to the previously published MgAMPPNP complex, with the attacking fosfomycin oxygen positioned 4 Å from the γ-phosphorus of ATP. Site-directed mutagenesis studies and comparison of these structures with that of homologous N-acetyl-l-glutamate and isopentenyl phosphate kinases allowed us to propose a model of phosphorylation of fosfomycin by FomA enzyme. A Mg cation ligates all three phosphate groups of ATP and together with positively charged K216, K9, K18, and H58 participates in the dissipation of negative charge during phosphoryl transfer, indicating that the transferred phosphate group is highly negatively charged, which would be expected for an associative mechanism. K216 polarizes the γ-phosphoryl group of ATP. K9, K18, and H58 participate in stabilization of the transition state. D150 and D208 play organizational roles in catalysis. S148, S149, and T210 participate in fosfomycin binding, with T210 being crucial for catalysis. Hence, it appears that as in the homologous enzymes, FomA-catalyzed phosphoryl transfer takes place by an in-line predominantly associative mechanism.


    Organizational Affiliation

    Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana 70803, United States. sveta@lsu.edu



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
FomA proteinA286Streptomyces wedmorensisMutation(s): 0 
Gene Names: fomAfosfomycin resistance kinase
EC: 2.7.4.26
Find proteins for Q56187 (Streptomyces wedmorensis)
Explore Q56187 
Go to UniProtKB:  Q56187
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ATP
Query on ATP

Download CCD File 
A
ADENOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O13 P3
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.185 
  • R-Value Observed: 0.185 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.876α = 90
b = 85.876β = 90
c = 80.152γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
AMoREphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-07-20
    Type: Initial release
  • Version 1.1: 2012-02-29
    Changes: Database references