5K0T

Crystal structure of methionyl-tRNA synthetase MetRS from Brucella melitensis in complex with inhibitor Chem 1415

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.258 

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Literature

Brucella melitensis Methionyl-tRNA-Synthetase (MetRS), a Potential Drug Target for Brucellosis.

Ojo, K.K., Ranade, R.M., Zhang, Z., Dranow, D.M., Myers, J.B., Choi, R., Nakazawa Hewitt, S., Edwards, T.E., Davies, D.R., Lorimer, D., Boyle, S.M., Barrett, L.K., Buckner, F.S., Fan, E., Van Voorhis, W.C.

(2016) PLoS One 11: e0160350-e0160350

  • DOI: 10.1371/journal.pone.0160350
  • Primary Citation of Related Structures:  
    4DLP, 4PY2, 5K0S, 5K0T

  • PubMed Abstract: 

    • We investigated Brucella melitensis methionyl-tRNA-synthetase (BmMetRS) with molecular, structural and phenotypic methods to learn if BmMetRS is a promising target for brucellosis drug development. Recombinant BmMetRS was expressed, purified from wild type Brucella melitensis biovar Abortus 2308 strain ATCC/CRP #DD-156 and screened by a thermal melt assay against a focused library of one hundred previously classified methionyl-tRNA-synthetase inhibitors of the blood stage form of Trypanosoma brucei ...

    We investigated Brucella melitensis methionyl-tRNA-synthetase (BmMetRS) with molecular, structural and phenotypic methods to learn if BmMetRS is a promising target for brucellosis drug development. Recombinant BmMetRS was expressed, purified from wild type Brucella melitensis biovar Abortus 2308 strain ATCC/CRP #DD-156 and screened by a thermal melt assay against a focused library of one hundred previously classified methionyl-tRNA-synthetase inhibitors of the blood stage form of Trypanosoma brucei. Three compounds showed appreciable shift of denaturation temperature and were selected for further studies on inhibition of the recombinant enzyme activity and cell viability against wild type B. melitensis strain 16M. BmMetRS protein complexed with these three inhibitors resolved into three-dimensional crystal structures and was analyzed. All three selected methionyl-tRNA-synthetase compounds inhibit recombinant BmMetRS enzymatic functions in an aminoacylation assay at varying concentrations. Furthermore, growth inhibition of B. melitensis strain 16M by the compounds was shown. Inhibitor-BmMetRS crystal structure models were used to illustrate the molecular basis of the enzyme inhibition. Our current data suggests that BmMetRS is a promising target for brucellosis drug development. However, further studies are needed to optimize lead compound potency, efficacy and safety as well as determine the pharmacokinetics, optimal dosage, and duration for effective treatment.

    Organizational Affiliation: 

    Center for Emerging and Re-emerging Infectious Diseases (CERID), Department of Medicine, Division of Allergy and Infectious Diseases, University of Washington, Seattle, Washington, United States of America.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Methionine--tRNA ligaseA, B, C536Brucella suis 1330Mutation(s): 0 
Gene Names: metG, BR0995, BS1330_I0991
EC: 6.1.1.10
UniProt
Find proteins for P59078 (Brucella suis biovar 1 (strain 1330))
Explore P59078 
Go to UniProtKB:  P59078
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP59078
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.286 
  • R-Value Work: 0.257 
  • R-Value Observed: 0.258 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.16α = 110.46
b = 99.65β = 88.09
c = 104.3γ = 99.72
Software Package:
Software NamePurpose
XSCALEdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-05-25
    Type: Initial release
  • Version 1.1: 2016-08-17
    Changes: Database references