6Y36

CCAAT-binding complex from Aspergillus fumigatus with cccA DNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis of HapE P88L -linked antifungal triazole resistance in Aspergillus fumigatus .

Hortschansky, P.Misslinger, M.Morl, J.Gsaller, F.Bromley, M.J.Brakhage, A.A.Groll, M.Haas, H.Huber, E.M.

(2020) Life Sci Alliance 3

  • DOI: 10.26508/lsa.202000729
  • Primary Citation of Related Structures:  
    6Y35, 6Y36, 6Y37, 6Y39

  • PubMed Abstract: 
  • Azoles are first-line therapeutics for human and plant fungal infections, but their broad use has promoted the development of resistances. Recently, a pan-azole-resistant clinical Aspergillus fumigatus isolate was identified to carry the mutation P88L in subunit HapE of the CCAAT-binding complex (CBC), a conserved eukaryotic transcription factor ...

    Azoles are first-line therapeutics for human and plant fungal infections, but their broad use has promoted the development of resistances. Recently, a pan-azole-resistant clinical Aspergillus fumigatus isolate was identified to carry the mutation P88L in subunit HapE of the CCAAT-binding complex (CBC), a conserved eukaryotic transcription factor. Here, we define the mechanistic basis for resistance in this isolate by showing that the HapE P88L mutation interferes with the CBC's ability to bend and sense CCAAT motifs. This failure leads to transcriptional derepression of the cyp51A gene, which encodes the target of azoles, the 14-α sterol demethylase Cyp51A, and ultimately causes drug resistance. In addition, we demonstrate that the CBC-associated transcriptional regulator HapX assists cyp51A repression in low-iron environments and that this iron-dependent effect is lost in the HapE P88L mutant. Altogether, these results indicate that the mutation HapE P88L confers increased resistance to azoles compared with wt A. fumigatus , particularly in low-iron clinical niches such as the lung.


    Organizational Affiliation

    Center for Integrated Protein Science Munich at the Department Chemistry, Technical University of Munich, Garching, Germany eva.huber@tum.de.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CCAAT-binding transcription factor subunit HAPBA64Aspergillus fumigatus Af293Mutation(s): 0 
Gene Names: AFUA_2G14720
UniProt
Find proteins for Q4X049 (Neosartorya fumigata (strain ATCC MYA-4609 / Af293 / CBS 101355 / FGSC A1100))
Explore Q4X049 
Go to UniProtKB:  Q4X049
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ4X049
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CCAAT-binding factor complex subunit HapCB92Aspergillus fumigatus A1163Mutation(s): 0 
Gene Names: Y699_06893
UniProt
Find proteins for A0A229Y8Y1 (Neosartorya fumigata)
Explore A0A229Y8Y1 
Go to UniProtKB:  A0A229Y8Y1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A229Y8Y1
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
CCAAT-binding factor complex subunit HapEC119Aspergillus fumigatus Af293Mutation(s): 0 
Gene Names: AFUA_6G05300
UniProt
Find proteins for Q4WDM9 (Neosartorya fumigata (strain ATCC MYA-4609 / Af293 / CBS 101355 / FGSC A1100))
Explore Q4WDM9 
Go to UniProtKB:  Q4WDM9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ4WDM9
Protein Feature View
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsLengthOrganismImage
DNA (25-MER)D 25Aspergillus fumigatus A1163
Protein Feature View
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  • Reference Sequence
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Entity ID: 5
MoleculeChainsLengthOrganismImage
DNA (25-MER)E 25Aspergillus fumigatus A1163
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO3
Query on SO3

Download Ideal Coordinates CCD File 
F [auth A]SULFITE ION
O3 S
LSNNMFCWUKXFEE-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.211 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.188 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.48α = 90
b = 83.74β = 90
c = 148.42γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

  • Deposited Date: 2020-02-17 
  • Released Date: 2020-05-27 
  • Deposition Author(s): Groll, M., Huber, E.M.

Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanyGR 1861/8-1
German Research Foundation (DFG)GermanySFB1309-325871075

Revision History  (Full details and data files)

  • Version 1.0: 2020-05-27
    Type: Initial release
  • Version 1.1: 2020-06-10
    Changes: Database references
  • Version 1.2: 2020-09-30
    Changes: Database references