2VXK

Structural comparison between Aspergillus fumigatus and human GNA1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.179 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Structural and Kinetic Differences between Human and Aspergillus Fumigatus D-Glucosamine-6- Phosphate N-Acetyltransferase.

Hurtado-Guerrero, R.Raimi, O.G.Min, J.Zeng, H.Vallius, L.Shepherd, S.Ibrahim, A.F.M.Wu, H.Plotnikov, A.N.Van Aalten, D.M.F.

(2008) Biochem J 415: 217

  • DOI: https://doi.org/10.1042/BJ20081000
  • Primary Citation of Related Structures:  
    2VXK

  • PubMed Abstract: 

    Aspergillus fumigatus is the causative agent of aspergillosis, a frequently invasive colonization of the lungs of immunocompromised patients. GNA1 (D-glucosamine-6-phosphate N-acetyltransferase) catalyses the acetylation of GlcN-6P (glucosamine-6-phosphate) to GlcNAc-6P (N-acetylglucosamine-6-phosphate), a key intermediate in the UDP-GlcNAc biosynthetic pathway. Gene disruption of gna1 in yeast and Candida albicans has provided genetic validation of the enzyme as a potential target. An understanding of potential active site differences between the human and A. fumigatus enzymes is required to enable further work aimed at identifying selective inhibitors for the fungal enzyme. In the present study, we describe crystal structures of both human and A. fumigatus GNA1, as well as their kinetic characterization. The structures show significant differences in the sugar-binding site with, in particular, several non-conservative substitutions near the phosphate-binding pocket. Mutagenesis targeting these differences revealed drastic effects on steady-state kinetics, suggesting that the differences could be exploitable with small-molecule inhibitors.


  • Organizational Affiliation

    Division of Biological Chemistry and Drug Discovery, College of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
GLUCOSAMINE 6-PHOSPHATE ACETYLTRANSFERASE190Aspergillus fumigatusMutation(s): 0 
EC: 2.3.1.4
UniProt
Find proteins for Q4WCU5 (Aspergillus fumigatus (strain ATCC MYA-4609 / CBS 101355 / FGSC A1100 / Af293))
Explore Q4WCU5 
Go to UniProtKB:  Q4WCU5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ4WCU5
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
COA
Query on COA

Download Ideal Coordinates CCD File 
D [auth A]COENZYME A
C21 H36 N7 O16 P3 S
RGJOEKWQDUBAIZ-IBOSZNHHSA-N
16G
Query on 16G

Download Ideal Coordinates CCD File 
B [auth A]2-acetamido-2-deoxy-6-O-phosphono-alpha-D-glucopyranose
C8 H16 N O9 P
BRGMHAYQAZFZDJ-PVFLNQBWSA-N
PO4
Query on PO4

Download Ideal Coordinates CCD File 
C [auth A]PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.178 
  • R-Value Observed: 0.179 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.606α = 90
b = 100.826β = 90
c = 55.35γ = 90
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-07-15
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Refinement description, Version format compliance
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Other, Structure summary
  • Version 1.3: 2024-05-08
    Changes: Data collection, Database references, Structure summary