Crystal structure of dehydrosqualene synthase (crtm) from s. aureus complexed with bph-1112

Experimental Data Snapshot

  • Resolution: 1.98 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.204 

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HIV-1 Integrase Inhibitor-Inspired Antibacterials Targeting Isoprenoid Biosynthesis.

Zhang, Y.Lin, F.-Y.Li, K.Zhu, W.Liu, Y.L.Cao, R.Pang, R.Lee, E.Axelson, J.Hensler, M.Wang, K.Molohon, K.J.Wang, Y.Mitchell, D.A.Nizet, V.Oldfield, E.

(2012) ACS Med Chem Lett 3: 402-406

  • DOI: https://doi.org/10.1021/ml300038t
  • Primary Citation of Related Structures:  
    3TH8, 4F6V, 4F6X

  • PubMed Abstract: 

    We report the discovery of antibacterial leads, keto- and diketo-acids, targeting two prenyl transferases: undecaprenyl diphosphate synthase (UPPS) and dehydrosqualene synthase (CrtM). The leads were suggested by the observation that keto- and diketo-acids bind to the active site Mg(2+)/Asp domain in HIV-1 integrase, and similar domains are present in prenyl transferases. We report the x-ray crystallographic structures of one diketo-acid and one keto-acid bound to CrtM, which supports the Mg(2+) binding hypothesis, together with the x-ray structure of one diketo-acid bound to UPPS. In all cases, the inhibitors bind to a farnesyl diphosphate substrate-binding site. Compound 45 had cell growth inhibition MIC(90) values of ~250-500 ng/mL against S. aureus, 500 ng/mL against Bacillus anthracis, 4 μg/mL against Listeria monocytogenes and Enterococcus faecium, and 1 μg/mL against Streptococcus pyogenes M1, but very little activity against E. coli (DH5α, K12) or human cell lines.

  • Organizational Affiliation

    PrenylX Research Institute, Zhangjiagang, 215600, P.R. China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dehydrosqualene synthase292Staphylococcus aureusMutation(s): 0 
Gene Names: crtM
Find proteins for A9JQL9 (Staphylococcus aureus)
Explore A9JQL9 
Go to UniProtKB:  A9JQL9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA9JQL9
Sequence Annotations
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
ZYL BindingDB:  4F6X Ki: 450 (nM) from 1 assay(s)
IC50: min: 3.30e+4, max: 4.53e+4 (nM) from 2 assay(s)
PDBBind:  4F6X IC50: 8200 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 1.98 Å
  • R-Value Free: 0.238 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.204 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.194α = 90
b = 80.194β = 90
c = 91.333γ = 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: 2012-06-20
    Type: Initial release
  • Version 1.1: 2018-01-31
    Changes: Advisory, Database references
  • Version 1.2: 2023-09-13
    Changes: Advisory, Data collection, Database references, Derived calculations, Refinement description