3Q78

Cryptococcus neoformans protein farnesyltransferase in complex with FSPP and DDPTASACNIQ peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structures of Cryptococcus neoformans Protein Farnesyltransferase Reveal Strategies for Developing Inhibitors That Target Fungal Pathogens.

Hast, M.A.Nichols, C.B.Armstrong, S.M.Kelly, S.M.Hellinga, H.W.Alspaugh, J.A.Beese, L.S.

(2011) J Biol Chem 286: 35149-35162

  • DOI: 10.1074/jbc.M111.250506
  • Primary Citation of Related Structures:  
    3Q73, 3Q75, 3Q78, 3Q7A, 3Q7F, 3Q79, 3SFX, 3SFY

  • PubMed Abstract: 
  • Cryptococcus neoformans is a fungal pathogen that causes life-threatening infections in immunocompromised individuals, including AIDS patients and transplant recipients. Few antifungals can treat C. neoformans infections, and drug resistance is increasing ...

    Cryptococcus neoformans is a fungal pathogen that causes life-threatening infections in immunocompromised individuals, including AIDS patients and transplant recipients. Few antifungals can treat C. neoformans infections, and drug resistance is increasing. Protein farnesyltransferase (FTase) catalyzes post-translational lipidation of key signal transduction proteins and is essential in C. neoformans. We present a multidisciplinary study validating C. neoformans FTase (CnFTase) as a drug target, showing that several anticancer FTase inhibitors with disparate scaffolds can inhibit C. neoformans and suggesting structure-based strategies for further optimization of these leads. Structural studies are an essential element for species-specific inhibitor development strategies by revealing similarities and differences between pathogen and host orthologs that can be exploited. We, therefore, present eight crystal structures of CnFTase that define the enzymatic reaction cycle, basis of ligand selection, and structurally divergent regions of the active site. Crystal structures of clinically important anticancer FTase inhibitors in complex with CnFTase reveal opportunities for optimization of selectivity for the fungal enzyme by modifying functional groups that interact with structurally diverse regions. A substrate-induced conformational change in CnFTase is observed as part of the reaction cycle, a feature that is mechanistically distinct from human FTase. Our combined structural and functional studies provide a framework for developing FTase inhibitors to treat invasive fungal infections.


    Organizational Affiliation

    Department of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Farnesyltransferase alpha subunitA349Cryptococcus neoformans var. grubii H99Mutation(s): 0 
Find proteins for Q55S71 (Cryptococcus neoformans var. neoformans serotype D (strain B-3501A))
Explore Q55S71 
Go to UniProtKB:  Q55S71
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Farnesyltransferase beta subunitB520Cryptococcus neoformans var. grubii H99Mutation(s): 0 
EC: 2.5.1.58
Find proteins for Q55QV6 (Cryptococcus neoformans var. neoformans serotype D (strain B-3501A))
Explore Q55QV6 
Go to UniProtKB:  Q55QV6
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
peptide substrateC [auth D]11N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FPS
Query on FPS

Download Ideal Coordinates CCD File 
G [auth B]S-[(2E,6E)-3,7,11-TRIMETHYLDODECA-2,6,10-TRIENYL] TRIHYDROGEN THIODIPHOSPHATE
C15 H28 O6 P2 S
MYMLCRQRXFRQGP-YFVJMOTDSA-N
 Ligand Interaction
3CX
Query on 3CX

Download Ideal Coordinates CCD File 
E [auth B], F [auth B](2S)-3-(cyclohexylamino)-2-hydroxypropane-1-sulfonic acid
C9 H19 N O4 S
INEWUCPYEUEQTN-VIFPVBQESA-N
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
D [auth B]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.184 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 143.02α = 90
b = 143.02β = 90
c = 130.55γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-08-03
    Type: Initial release
  • Version 1.1: 2011-10-19
    Changes: Database references