5HWC

Aspergillus fumigatus FKBP12 P90G protein bound with FK506 in P212121 space group


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.165 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structures of Pathogenic Fungal FKBP12s Reveal Possible Self-Catalysis Function.

Tonthat, N.K.Juvvadi, P.R.Zhang, H.Lee, S.C.Venters, R.Spicer, L.Steinbach, W.J.Heitman, J.Schumacher, M.A.

(2016) Mbio 7: e00492-e00416

  • DOI: 10.1128/mBio.00492-16
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Invasive fungal infections remain difficult to treat and require novel targeting strategies. The 12-kDa FK506-binding protein (FKBP12) is a ubiquitously expressed peptidyl-prolyl isomerase with considerable homology between fungal pathogens and is th ...

    Invasive fungal infections remain difficult to treat and require novel targeting strategies. The 12-kDa FK506-binding protein (FKBP12) is a ubiquitously expressed peptidyl-prolyl isomerase with considerable homology between fungal pathogens and is thus a prime candidate for future targeting efforts to generate a panfungal strategy. Despite decades of research on FKBPs, their substrates and mechanisms of action remain unclear. Here we describe structural, biochemical, and in vivo analyses of FKBP12s from the pathogenic fungi Candida albicans, Candida glabrata, and Aspergillus fumigatus Strikingly, multiple apo A. fumigatus and C. albicans FKBP12 crystal structures revealed a symmetric, intermolecular interaction involving the deep insertion of an active-site loop proline into the active-site pocket of an adjacent subunit. Such interactions have not been observed in previous FKBP structures. This finding indicates the possibility that this is a self-substrate interaction unique to the A. fumigatus and C. albicans fungal proteins that contain this central proline. Structures obtained with the proline in the cis and trans states provide more data in support of self-catalysis. Moreover, cysteine cross-linking experiments captured the interacting dimer, supporting the idea that it forms in solution. Finally, genetic studies exploring the impact of mutations altering the central proline and an adjacent residue provide evidence that any dimeric state formed in vivo, where FKBP12 concentrations are low, is transient. Taken together, these findings suggest a unique mechanism of self-substrate regulation by fungal FKBP12s, lending further novel understanding of this protein for future drug-targeting efforts.


    Organizational Affiliation

    Department of Pediatrics, Division of Pediatric Infectious Diseases, Duke University School of Medicine, Durham, North Carolina, USA Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, North Carolina, USA.,Department of Pediatrics, Division of Pediatric Infectious Diseases, Duke University School of Medicine, Durham, North Carolina, USA.,Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, North Carolina, USA.,Department of Biochemistry, Duke University School of Medicine, Durham, North Carolina, USA.,Department of Biochemistry, Duke University School of Medicine, Durham, North Carolina, USA maria.schumacher@duke.edu.,Department of Biochemistry, Duke University School of Medicine, Durham, North Carolina, USA Department of Radiology, Duke University School of Medicine, Durham, North Carolina, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
FK506-binding protein 1A
A
115Neosartorya fumigata (strain ATCC MYA-4609 / Af293 / CBS 101355 / FGSC A1100)Mutation(s): 1 
Gene Names: fpr1A
EC: 5.2.1.8
Find proteins for Q4WLV6 (Neosartorya fumigata (strain ATCC MYA-4609 / Af293 / CBS 101355 / FGSC A1100))
Go to UniProtKB:  Q4WLV6
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FK5
Query on FK5

Download SDF File 
Download CCD File 
A
8-DEETHYL-8-[BUT-3-ENYL]-ASCOMYCIN
K506
C44 H69 N O12
QJJXYPPXXYFBGM-LFZNUXCKSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.165 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 37.010α = 90.00
b = 51.138β = 90.00
c = 55.592γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-09-14
    Type: Initial release