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 1.1 of the entry. See complete history


Literature

Structural basis of HapEP88L-linked antifungal triazole resistance inAspergillus 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
  • Structures With Same Primary Citation

  • 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 mut ...

    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 LengthOrganismDetails
CCAAT-binding transcription factor subunit HAPB
A
64Aspergillus fumigatus Af293Mutation(s): 0 
Gene Names: AFUA_2G14720
Find proteins for Q4X049 (Neosartorya fumigata (strain ATCC MYA-4609 / Af293 / CBS 101355 / FGSC A1100))
Go to UniProtKB:  Q4X049
Protein Feature View
  • Reference Sequence

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
CCAAT-binding factor complex subunit HapC
B
92Aspergillus fumigatus A1163Mutation(s): 0 
Gene Names: Y699_06893
Protein Feature View
  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
CCAAT-binding factor complex subunit HapE
C
119Aspergillus fumigatus Af293Mutation(s): 0 
Gene Names: AFUA_6G05300
Find proteins for Q4WDM9 (Neosartorya fumigata (strain ATCC MYA-4609 / Af293 / CBS 101355 / FGSC A1100))
Go to UniProtKB:  Q4WDM9
Protein Feature View
  • Reference Sequence

Find similar nucleic acids by: Sequence  |  Structure

Entity ID: 4
MoleculeChainsLengthOrganism
DNA (25-MER)D25Aspergillus fumigatus A1163

Find similar nucleic acids by: Sequence  |  Structure

Entity ID: 5
MoleculeChainsLengthOrganism
DNA (25-MER)E25Aspergillus fumigatus A1163
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO3
Query on SO3

Download CCD File 
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

View Full Validation Report



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 

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