Plasmodium falciparum putative FK506-binding protein PFL2275c, C-terminal TPR-containing domain

Experimental Data Snapshot

  • Resolution: 1.63 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.201 

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This is version 1.3 of the entry. See complete history


Crystallographic structure of the tetratricopeptide repeat domain of Plasmodium falciparum FKBP35 and its molecular interaction with Hsp90 C-terminal pentapeptide.

Alag, R.Bharatham, N.Dong, A.Hills, T.Harikishore, A.Widjaja, A.A.Shochat, S.G.Hui, R.Yoon, H.S.

(2009) Protein Sci 18: 2115-2124

  • DOI: https://doi.org/10.1002/pro.226
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Plasmodium falciparum FK506-binding protein 35 (PfFKBP35) that binds to FK506 contains a conserved tetratricopeptide repeat (TPR) domain. Several known TPR domains such as Hop, PPP5, CHIP, and FKBP52 are structurally conserved and are able to interact with molecular chaperones such as Hsp70/Hsp90. Here, we present the crystal structure of PfFKBP35-TPR and demonstrate its interaction with Hsp90 C-terminal pentapeptide (MEEVD) by surface plasmon resonance and nuclear magnetic resonance spectroscopy-based binding studies. Our sequence and structural analyses reveal that PfFKBP35 is similar to Hop and PPP5 in possessing all the conserved residues which are important for carboxylate clamping with Hsp90. Mutational studies were carried out on positively charged clamp residues that are crucial for binding to carboxylate groups of aspartate, showing that all the mutated residues are important for Hsp90 binding. Molecular docking and electrostatic calculations demonstrated that the MEEVD peptide of Hsp90 can form aspartate clamp unlike FKBP52. Our results provide insightful information and structural basis about the molecular interaction between PfFKBP35-TPR and Hsp90.

  • Organizational Affiliation

    Nanyang Technological University, Singapore.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
70 kDa peptidylprolyl isomerase, putative
A, B
198Plasmodium falciparumMutation(s): 0 
Find proteins for Q8I4V8 (Plasmodium falciparum (isolate 3D7))
Explore Q8I4V8 
Go to UniProtKB:  Q8I4V8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8I4V8
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.63 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.200 
  • R-Value Observed: 0.201 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.239α = 90
b = 62.936β = 90
c = 103.334γ = 90
Software Package:
Software NamePurpose
CrystalCleardata reduction
HKL-2000data scaling
ARP/wARPmodel building
Cootmodel building

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2006-01-24
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references