T. Brucei Farnesyl Diphosphate Synthase Complexed with Bisphosphonate BPH-210

Experimental Data Snapshot

  • Resolution: 2.45 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.266 
  • R-Value Observed: 0.266 

Starting Model: experimental
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Structures of a potent phenylalkyl bisphosphonate inhibitor bound to farnesyl and geranylgeranyl diphosphate synthases.

Cao, R.Chen, C.K.Guo, R.T.Wang, A.H.Oldfield, E.

(2008) Proteins 73: 431-439

  • DOI: https://doi.org/10.1002/prot.22066
  • Primary Citation of Related Structures:  
    2P1C, 2Z7H

  • PubMed Abstract: 

    We report the X-ray crystallographic structures of the bisphosphonate N-[methyl(4-phenylbutyl)]-3-aminopropyl-1-hydroxy-1,1-bisphosphonate (BPH-210), a potent analog of pamidronate (Aredia), bound to farnesyl diphosphate synthase (FPPS) from Trypanosoma brucei as well as to geranylgeranyl diphosphate synthase from Saccharomyces cerevisiae. BPH-210 binds to FPPS, together with 3 Mg(2+), with its long, hydrophobic phenylbutyl side-chain being located in the same binding pocket that is occupied by allylic diphosphates and other bisphosphonates. Binding is overwhelmingly entropy driven, as determined by isothermal titration calorimetry. The structure is of interest since it explains the lack of potency of longer chain analogs against FPPS, since these would be expected to have a steric clash with an aromatic ring at the distal end of the binding site. Unlike shorter chain FPPS inhibitors, such as pamidronate, BPH-210 is also found to be a potent inhibitor of human geranylgeranyl diphosphate synthase. In this case, the bisphosphonate binds only to the GGPP product inhibitory site, with only 1 (chain A) or 0 (chain B) Mg(2+), and DeltaS is much smaller and DeltaH is approximately 6 k cal more negative than in the case of FPPS binding. Overall, these results are of general interest since they show that some bisphosphonates can bind to more than one trans-prenyl synthase enzyme which, in some cases, can be expected to enhance their overall activity in vitro and in vivo.

  • Organizational Affiliation

    Center for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Farnesyl pyrophosphate synthase
A, B
390Trypanosoma bruceiMutation(s): 0 
Find proteins for Q86C09 (Trypanosoma brucei)
Explore Q86C09 
Go to UniProtKB:  Q86C09
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ86C09
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on GG3

Download Ideal Coordinates CCD File 
H [auth A],
M [auth B]
C14 H25 N O7 P2
Query on BME

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C2 H6 O S
Query on ACT

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F [auth A],
G [auth A],
L [auth B]
C2 H3 O2
Query on MG

Download Ideal Coordinates CCD File 
C [auth A]
D [auth A]
E [auth A]
I [auth B]
J [auth B]
C [auth A],
D [auth A],
E [auth A],
I [auth B],
J [auth B],
K [auth B]
Binding Affinity Annotations 
IDSourceBinding Affinity
GG3 PDBBind:  2P1C Ki: 21 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.45 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.266 
  • R-Value Observed: 0.266 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.124α = 90
b = 92.124β = 90
c = 177.747γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-03-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.2: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description