6L2C

Crystal structure of Aspergillus fumigatus mitochondrial acetyl-CoA acetyltransferase in complex with CoA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.44 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Characterization ofAspergillus fumigatusmitochondrial acetyl-CoA acetyltransferase as an antifungal target.

Zhang, Y.Wei, W.Fan, J.Jin, C.Lu, L.Fang, W.

(2020) Appl.Environ.Microbiol. --: --

  • DOI: 10.1128/AEM.02986-19
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Ergosterol plays an important role in maintaining cell membrane sterol homeostasis in fungi, and as such, is considered as an effective target in antifungal chemotherapy. In yeast, the enzyme acetyl-CoA acetyltransferase (ERG10) catalyzes the Claisen ...

    Ergosterol plays an important role in maintaining cell membrane sterol homeostasis in fungi, and as such, is considered as an effective target in antifungal chemotherapy. In yeast, the enzyme acetyl-CoA acetyltransferase (ERG10) catalyzes the Claisen condensation of two acetyl-CoA molecules to acetoacetyl-CoA in the ergosterol biosynthesis pathway and is reported critical for cell viability. Using yeast ERG10 for alignment, two orthologues Af ERG10A (AFUB_000550) and Af ERG10B (AFUB_083570) were discovered in opportunistic fungal pathogen Aspergillus fumigatus Despite the essentiality of Af ERG10B has been previously validated, the biological function of Af ERG10A remains unclear. In this study, we have characterized recombinant Af ERG10A as a functional acetyl-CoA acetyltransferase catalyzing both synthetic and degradative reactions. Unexpectedly, Af ERG10A localizes to mitochondria in A. fumigatus as shown by C -terminal GFP-tag fusion. Both knockout and inducible promoter strategies demonstrate that Aferg10A is essential for the survival of A. fumigatus Reduced expression of Aferg10A leads to severe morphological defects and increased susceptibility to oxidative and cell wall stresses. Although the catalytic mechanism of acetyl-CoA acetyltransferase family is highly conserved, the crystal structure of Af ERG10A and its complex with CoA are solved revealing four substitutions within the CoA binding site that are different from human orthologues. Taken together, our combination of genetic and structural studies demonstrates that mitochondrial Af ERG10A is essential for A. fumigatus cell viability and could be a potential drug target to feed antifungal drug development pipeline. Importance A growing number of people worldwide are suffering from invasive aspergillosis, caused by human opportunistic fungal pathogen A. fumigatus Current therapeutic options rely on limited repertoire of antifungals. Ergosterol is an essential component of the fungal cell membrane as well as a target of current antifungals. Approximately 20 enzymes are involved in ergosterol biosynthesis of which acetyl-CoA acetyltransferase (ACAT) is the first enzyme. Two ACATs in A. fumigatus are Af Erg10A and Af Erg10B. However, the biological function of Af Erg10A is yet to be investigated. In this study, we showed that Af Erg10A is localized in the mitochondria, and is essential for A. fumigatus survival and morphological development. In combination with structural studies we validated Af Erg10A as a potential drug target that will facilitate the development of novel antifungals and improve the efficiency of existing drugs.


    Organizational Affiliation

    Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Centre for Microbiology, College of Life Sciences, Nanjing Normal University, Nanjing, China.,National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Guangxi Academy of Sciences, Nanning, China wfang@gxas.cn.,National Engineering Research Center for Non-Food Biorefinery, State Key Laboratory of Non-Food Biomass and Enzyme Technology, Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Guangxi Academy of Sciences, Nanning, China.,School of Life Sciences, University of Science and Technology of China, Hefei, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Acetyl-CoA-acetyltransferase, putative
A, B, C, D
402Neosartorya fumigata (strain CEA10 / CBS 144.89 / FGSC A1163)Mutation(s): 0 
Find proteins for B0XMC1 (Neosartorya fumigata (strain CEA10 / CBS 144.89 / FGSC A1163))
Go to UniProtKB:  B0XMC1
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
COA
Query on COA

Download SDF File 
Download CCD File 
A, B, C, D
COENZYME A
C21 H36 N7 O16 P3 S
RGJOEKWQDUBAIZ-IBOSZNHHSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSO
Query on CSO
A, B, C, D
L-PEPTIDE LINKINGC3 H7 N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.44 Å
  • R-Value Free: 0.257 
  • R-Value Work: 0.203 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 63.254α = 90.00
b = 173.546β = 90.00
c = 180.318γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
REFMACrefinement
SCALAdata scaling
MOLREPphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina31960032
National Natural Science Foundation of ChinaChina31900404

Revision History 

  • Version 1.0: 2020-02-12
    Type: Initial release