Phosphoglucose isomerase of Aspergillus fumigatus in complexed with Glucose-6-phosphate

Experimental Data Snapshot

  • Resolution: 1.78 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.155 

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Phosphoglucose Isomerase Is Important for Aspergillus fumigatus Cell Wall Biogenesis.

Zhou, Y.Yan, K.Qin, Q.Raimi, O.G.Du, C.Wang, B.Ahamefule, C.S.Kowalski, B.Jin, C.van Aalten, D.M.F.Fang, W.

(2022) mBio 13: e0142622-e0142622

  • DOI: https://doi.org/10.1128/mbio.01426-22
  • Primary Citation of Related Structures:  
    7OYL, 7U34

  • PubMed Abstract: 

    Aspergillus fumigatus is a devastating opportunistic fungal pathogen causing hundreds of thousands of deaths every year. Phosphoglucose isomerase (PGI) is a glycolytic enzyme that converts glucose-6-phosphate to fructose-6-phosphate, a key precursor of fungal cell wall biosynthesis. Here, we demonstrate that the growth of A. fumigatus is repressed by the deletion of pgi , which can be rescued by glucose and fructose supplementation in a 1:10 ratio. Even under these optimized growth conditions, the Δ pgi mutant exhibits severe cell wall defects, retarded development, and attenuated virulence in Caenorhabditis elegans and Galleria mellonella infection models. To facilitate exploitation of A. fumigatus PGI as an antifungal target, we determined its crystal structure, revealing potential avenues for developing inhibitors, which could potentially be used as adjunctive therapy in combination with other systemic antifungals. IMPORTANCE Aspergillus fumigatus is an opportunistic fungal pathogen causing deadly infections in immunocompromised patients. Enzymes essential for fungal survival and cell wall biosynthesis are considered potential drug targets against A. fumigatus. PGI catalyzes the second step of the glycolysis pathway, linking glycolysis and the pentose phosphate pathway. As such, PGI has been widely considered as a target for metabolic regulation and therefore a therapeutic target against hypoxia-related diseases. Our study here reveals that PGI is important for A. fumigatus survival and exhibit pleiotropic functions, including development, cell wall glucan biosynthesis, and virulence. We also solved the crystal structure of PGI, thus providing the genetic and structural groundwork for the exploitation of PGI as a potential antifungal target.

  • Organizational Affiliation

    Guangxi Biological Sciences and Biotechnology Center, Guangxi Academy of Sciencesgrid.418329.5, Nanning, Guangxi, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Glucose-6-phosphate isomerase558Aspergillus fumigatusMutation(s): 0 
Gene Names: CDV57_05145
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
BG6 (Subject of Investigation/LOI)
Query on BG6

Download Ideal Coordinates CCD File 
J [auth A]6-O-phosphono-beta-D-glucopyranose
C6 H13 O9 P
Query on GOL

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D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A]
C3 H8 O3
Query on CL

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B [auth A],
C [auth A]
Query on NA

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Experimental Data & Validation

Experimental Data

  • Resolution: 1.78 Å
  • R-Value Free: 0.180 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.155 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.251α = 90
b = 85.251β = 90
c = 232.503γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
PDB_EXTRACTdata extraction
XDSdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Medical Research Council (MRC, United Kingdom)United KingdomV001094

Revision History  (Full details and data files)

  • Version 1.0: 2022-07-13
    Type: Initial release
  • Version 1.1: 2023-07-26
    Changes: Database references
  • Version 1.2: 2024-01-31
    Changes: Data collection, Refinement description