1SA4

human protein farnesyltransferase complexed with FPP and R115777


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal Structures of the Anticancer Clinical Candidates R115777 (Tipifarnib) and BMS-214662 Complexed with Protein Farnesyltransferase Suggest a Mechanism of FTI Selectivity.

Reid, T.S.Beese, L.S.

(2004) Biochemistry 43: 6877-6884

  • DOI: 10.1021/bi049723b
  • Primary Citation of Related Structures:  1SA5

  • PubMed Abstract: 
  • The search for new cancer therapeutics has identified protein farnesyltransferase (FTase) as a promising drug target. This enzyme attaches isoprenoid lipids to signal transduction proteins involved in growth and differentiation. The two FTase inhibit ...

    The search for new cancer therapeutics has identified protein farnesyltransferase (FTase) as a promising drug target. This enzyme attaches isoprenoid lipids to signal transduction proteins involved in growth and differentiation. The two FTase inhibitors (FTIs), R115777 (tipifarnib/Zarnestra) and BMS-214662, have undergone evaluation as cancer therapeutics in phase I and II clinical trials. R115777 has been evaluated in phase III clinical trials and shows indications for the treatment of blood and breast malignancies. Here we present crystal structures of R115777 and BMS-214662 complexed with mammalian FTase. These structures illustrate the molecular mechanism of inhibition and selectivity toward FTase over the related enzyme, protein geranylgeranyltransferase type I (GGTase-I). These results, combined with previous biochemical and structural analyses, identify features of FTase that could be exploited to modulate inhibitor potency and specificity and should aid in the continued development of FTIs as therapeutics for the treatment of cancer and parasitic infections.


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein farnesyltransferase/geranylgeranyltransferase type I alpha subunit
A
382Homo sapiensGene Names: FNTA
EC: 2.5.1.58, 2.5.1.59
Find proteins for P49354 (Homo sapiens)
Go to Gene View: FNTA
Go to UniProtKB:  P49354
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Protein farnesyltransferase beta subunit
B
437Homo sapiensGene Names: FNTB
EC: 2.5.1.58
Find proteins for P49356 (Homo sapiens)
Go to Gene View: FNTB
Go to UniProtKB:  P49356
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SUC
Query on SUC

Download SDF File 
Download CCD File 
B
SUCROSE
C12 H22 O11
CZMRCDWAGMRECN-UGDNZRGBSA-N
 Ligand Interaction
ZN
Query on ZN

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Download CCD File 
B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
JAN
Query on JAN

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Download CCD File 
B
6-[(S)-AMINO(4-CHLOROPHENYL)(1-METHYL-1H-IMIDAZOL-5-YL)METHYL]-4-(3-CHLOROPHENYL)-1-METHYLQUINOLIN-2(1H)-ONE
R115777; TIPIFARNIB
C27 H22 Cl2 N4 O
PLHJCIYEEKOWNM-HHHXNRCGSA-N
 Ligand Interaction
FPP
Query on FPP

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Download CCD File 
B
FARNESYL DIPHOSPHATE
C15 H28 O7 P2
VWFJDQUYCIWHTN-YFVJMOTDSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.195 
  • R-Value Work: 0.166 
  • Space Group: P 61
Unit Cell:
Length (Å)Angle (°)
a = 178.442α = 90.00
b = 178.442β = 90.00
c = 64.458γ = 120.00
Software Package:
Software NamePurpose
CNSrefinement
HKL-2000data scaling
CNSphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-06-08
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance