4CAX

Crystal structure of Aspergillus fumigatus N-myristoyl transferase in complex with myristoyl CoA and a pyrazole sulphonamide ligand (DDD85646)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.225 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

N-Myristoyltransferase is a Cell Wall Target in Aspergillus Fumigatus.

Fang, W.Robinson, D.A.Raimi, O.G.Blair, D.E.Harrison, J.R.Lockhart, D.E.A.Torrie, L.S.Ruda, G.F.Wyatt, P.G.Gilbert, I.H.Van Aalten, D.M.F.

(2015) ACS Chem Biol 10: 1425

  • DOI: 10.1021/cb5008647
  • Primary Citation of Related Structures:  
    4CAV, 4CAW, 4CAX

  • PubMed Abstract: 
  • Treatment of filamentous fungal infections relies on a limited repertoire of antifungal agents. Compounds possessing novel modes of action are urgently required. N-myristoylation is a ubiquitous modification of eukaryotic proteins. The enzyme N-myristoyltransferase (NMT) has been considered a potential therapeutic target in protozoa and yeasts ...

    Treatment of filamentous fungal infections relies on a limited repertoire of antifungal agents. Compounds possessing novel modes of action are urgently required. N-myristoylation is a ubiquitous modification of eukaryotic proteins. The enzyme N-myristoyltransferase (NMT) has been considered a potential therapeutic target in protozoa and yeasts. Here, we show that the filamentous fungal pathogen Aspergillus fumigatus possesses an active NMT enzyme that is essential for survival. Surprisingly, partial repression of the gene revealed downstream effects of N-myristoylation on cell wall morphology. Screening a library of inhibitors led to the discovery of a pyrazole sulphonamide compound that inhibits the enzyme and is fungicidal under partially repressive nmt conditions. Together with a crystallographic complex showing the inhibitor binding in the peptide substrate pocket, we provide evidence of NMT being a potential drug target in A. fumigatus.


    Organizational Affiliation

    †Division of Molecular Microbiology, ‡Division of Biological Chemistry and Drug Discovery, §MRC Protein Phosphorylation and Ubiquitylation Unit, College of Life Sciences, University of Dundee, Dundee, DD1 5EH, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GLYCYLPEPTIDE N-TETRADECANOYLTRANSFERASEA411Aspergillus fumigatusMutation(s): 0 
EC: 2.3.1.97
UniProt
Find proteins for Q9UVX3 (Neosartorya fumigata (strain ATCC MYA-4609 / Af293 / CBS 101355 / FGSC A1100))
Explore Q9UVX3 
Go to UniProtKB:  Q9UVX3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UVX3
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MYA
Query on MYA

Download Ideal Coordinates CCD File 
B [auth A]TETRADECANOYL-COA
C35 H62 N7 O17 P3 S
DUAFKXOFBZQTQE-GLTUGWJXDB
 Ligand Interaction
646
Query on 646

Download Ideal Coordinates CCD File 
C [auth A]2,6-dichloro-4-(2-piperazin-1-ylpyridin-4-yl)-N-(1,3,5-trimethyl-1H-pyrazol-4-yl)benzenesulfonamide
C21 H24 Cl2 N6 O2 S
XMBSZPZJLPTFMV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.225 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.985α = 90
b = 58.576β = 90
c = 152.528γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2014-09-17
    Type: Initial release
  • Version 1.1: 2016-03-23
    Changes: Database references