5ZHI

Apo crystal structure of TrmD from Mycobacterium tuberculosis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.162 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Thienopyrimidinone Derivatives That Inhibit Bacterial tRNA (Guanine37-N1)-Methyltransferase (TrmD) by Restructuring the Active Site with a Tyrosine-Flipping Mechanism.

Zhong, W.Pasunooti, K.K.Balamkundu, S.Wong, Y.H.Nah, Q.Gadi, V.Gnanakalai, S.Chionh, Y.H.McBee, M.E.Gopal, P.Lim, S.H.Olivier, N.Buurman, E.T.Dick, T.Liu, C.F.Lescar, J.Dedon, P.C.

(2019) J Med Chem 62: 7788-7805

  • DOI: 10.1021/acs.jmedchem.9b00582
  • Primary Citation of Related Structures:  
    5ZHL, 5ZHK, 5ZHN, 5ZHM, 5ZHJ, 5ZHI, 6JOF, 6JOE

  • PubMed Abstract: 
  • Among the >120 modified ribonucleosides in the prokaryotic epitranscriptome, many tRNA modifications are critical to bacterial survival, which makes their synthetic enzymes ideal targets for antibiotic development. Here we performed a structure-based design of inhibitors of tRNA-(N 1 G37) methyltransferase, TrmD, which is an essential enzyme in many bacterial pathogens ...

    Among the >120 modified ribonucleosides in the prokaryotic epitranscriptome, many tRNA modifications are critical to bacterial survival, which makes their synthetic enzymes ideal targets for antibiotic development. Here we performed a structure-based design of inhibitors of tRNA-(N 1 G37) methyltransferase, TrmD, which is an essential enzyme in many bacterial pathogens. On the basis of crystal structures of TrmDs from Pseudomonas aeruginosa and Mycobacterium tuberculosis , we synthesized a series of thienopyrimidinone derivatives with nanomolar potency against TrmD in vitro and discovered a novel active site conformational change triggered by inhibitor binding. This tyrosine-flipping mechanism is uniquely found in P. aeruginosa TrmD and renders the enzyme inaccessible to the cofactor S -adenosyl-l-methionine (SAM) and probably to the substrate tRNA. Biophysical and biochemical structure-activity relationship studies provided insights into the mechanisms underlying the potency of thienopyrimidinones as TrmD inhibitors, with several derivatives found to be active against Gram-positive and mycobacterial pathogens. These results lay a foundation for further development of TrmD inhibitors as antimicrobial agents.


    Organizational Affiliation

    Department of Biological Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
tRNA (guanine-N(1)-)-methyltransferaseA, B238Mycobacterium tuberculosis CDC1551Mutation(s): 0 
Gene Names: trmDMT2974
EC: 2.1.1.228
UniProt
Find proteins for P9WFY6 (Mycobacterium tuberculosis (strain CDC 1551 / Oshkosh))
Explore P9WFY6 
Go to UniProtKB:  P9WFY6
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.200 
  • R-Value Work: 0.160 
  • R-Value Observed: 0.162 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 44.17α = 90
b = 113.07β = 110.75
c = 44.21γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Singapore SMART Innovation CentreSingaporeING137070-BIO

Revision History  (Full details and data files)

  • Version 1.0: 2019-03-06
    Type: Initial release
  • Version 1.1: 2019-09-04
    Changes: Data collection, Database references
  • Version 1.2: 2019-09-25
    Changes: Data collection, Database references